I absolutely love the subliminal messages to buy EMF audio you did there!!! BRILLIANT!!!!! 🤣🤣 (said in a calm smooth voice” 🤣🤣 had me cracking up at the end
Thank you emf .. Im glad you spoke up for EXO.. Hes a great guy and he was doing us all a service with education.. Just as you have as well. No bash just plain out open up eyes where was needed.. I belive with all these faults you and exo pointed out ..You have done more than enough to help them fix and start over .. If the public forgives ... Skilled labor isnt cheap labor and cheap labor isnt skilled labor. EMF compliant only 😂
Rockville done 0 testing or research on their own woofers and it's biting them in the ass.Instead of going at their build house for sending them BS they go at the customers.🤔🤔
Tony Melo the problem with China made products is 98% of raw materials they get is not spect. The materials is not tested because who is making it has no regulations. That’s another reason why they can do it so cheap. For an example, they don’t X-ray their welds. Only because they don’t have to.
I thought I was losing it when a hat popped onto your head during your non-threatening voice portion of the video and then again when it changed colors lol.
Blowville needs to Just eat Crow and go back to the drawing board ...rate their subs at the point of stable and not at the point of where it blows and just Forget about the CEA rating. I have no clue why they're so stuck on that rating that means nothing they need to do some true real tests and give it an honest rating. And this is why the car community is so tough on this industry Because they're tired of getting taken advantage of from companies that pulls stupid ship like this and wasting our damn money on crap! Thank you so much for doing this EMF!
To play devils advocate even this test EMF did is misleading as the Q and resonance of the ported enclosure will have more to do with whether it survives or not. If the enclosure is being driven near its resonance, the sub will experience the least amount of cone movement due to the high Q there, and its impedance will be at its lowest point, and the current conversely at its highest. As the power dissipated increases with the square of the current (P=i^2*r), and theres a lot more of it now at resonance, the voice coil can rapidly overheat due to the relatively small movement of the voice coil combined with the high current draw. Theres a lot more to rating a sub then just what it can handle, and there's no real safe way to actually ensure a speaker will survive rated power in all circumstances. EMF's subs could easily suffer the same fate and fail below their rated power limits if the conditions are right.
If I was having trouble I would have no problem asking a successful company for advice as to why it's not working out but the people at rockville are just stupid plain and simple
CEA is for amps not subs and speakers. My brother used to have 2 ten inch Sony Xplods and he pushed 1000 watts on those 2 subs, it did not blow but made the voice coils hot but not hot enough to cause failure but it would still blow on a road trip. Sony Xplods are budget SPL subs able to handle a lot of abuse for it’s cheap price.
😂😂😂. I got 2 of there 10's. Both have there own amp. I got 2 rockford 600x1 amps they are taking a beating an holding. Now the ones i have are svc 4ohm shallow mount in a seald box. Been beating on them for some time now with no problem i play songs from 15hz to 60hz with no problem. I prefer a different brand but they are doing good so far. Ill putt them in a ported box an see how they hold up.
@@happys104092243 not saying they're stuff is shit... but you have to admit they're just looking worse every single time they try to "justify" their product
That was a very informative video. It was funny when you were summarizing the testing at the end and you kept changing the koozie color and your hat color.
I think on the spec sheet aluminum coil is referencing the coil Former, and the wire itself is OFC. It does look like the former is indeed black. With regards to the cast aluminum basket increasing efficiency you can typically have tighter coil gap due to stiffer structure - so that does improve efficiency.
The gap has nothing to do with the basket. Suggesting you can have a tighter gap because of a basket would mean your top plate is flexible. If anything, the motor would provide the basket with more rigidity, not the other way around.
That would actually likely be incredible for their business. It hits the target demographic while moving enormous volume. Returns would be the only downside.
EMF hat, drink holder, shirt and key chains.... dang you started representing hard at the end lmao. Can I join your squad? You make it look gangsta! We can pull up on Rockville right now and shake their building to the ground, I make the tracks and you bring the Boom lmao Love the video and thanks for sharing!!!
Thank you EMF, I've been in audio for 30 plus years and have never been so ticked at companies like the one you did on tested subwoofer, their are compliant testing and there is other compliant testing, but in the end it all comes down to what the real true power of the driver is really made to handle, true wattage will always prevail in real world settings, given you know the threshold of the units limit, again keep up the awesome work 👍
Off brand product fooling the public by combining two name brands people will say oh that sounds familiar I heard that before let me get one producing inexpensive Chinese garbage without doing any of the research and development themselves basically just Mass producing and copying all this hard work making a huge markup on their brand.
I am glad I subscribed to this channel. Not because or garbageville nonsense, but because of the true knowledge given and how you actually explain stuff. Actually makes me want to buy your products!
It sux rockford fosgate is mentioned with those brands. I've had 2 p3 12's that's rated 600 watts a piece on a taramps hd3000 with the gain well over half wired to 1ohm for well over a year and they still sound amazing. Their amps do rated power to which has been proven.
Gain position IS NOT an indication of power output. You very well could be making 500 watts total in that gain position, or you could be clipping it to death from the gain position being too high.
I know gain is not an indication of power, I'm not trying to pretend I know more than u about this stuff because I don't but I'm not an idiot either . I was only saying wat I've had my taramps on over the years .and no I'm not clipping any of my subs . My whole argument is full bridge can sound good on subs and be reliable. I paid under$300 for both of my taramps and while your amp is better all around, at $500 for a 2k on sale for an EMF amp,the taramps smart 3 will always be a better value. I also have a stetsom vulcan 5k and the EMF 2k is still $100 more than the stetsom vulcan 5k while your amp is on sale. I'm not saying your amp isn't worth it ,it's just to expensive for a lot of us. U can keep speculating on wat u think clda be happening with my systems and my full bridge amps but nobody has ever got in my cars and not been impressed with how loud and how good they sound
I know your a car audio genius and I'm not being sarcastic,but not all of us are complete idiots when it comes to car audio. I'm only saying that because u capitalized IS NOT in your comment. Why can't u admit that a full bridge amp can sound good on subs I admitted your amps are superior and even said I'd trade my taramps for one in a heartbeat . But you keep trying to make me seem like I don't know wat I'm talking about any of this..I've always supported you and I never acted like an ass whatsoever so u don't need to do that
Sounds like Chinese translated. I’m sure it’s black aluminum formers with ofc wire. Either way it’s a junk sub that could’ve been a great bargain if they changed a few things.
Reminded me of the cool professor; we had fun and definitely learned something. This is a historic moment for car audio. There are those with the equipment to verify the quality of their purchases and share it with those who are at the mercy of a company. Those who say the hobby is loosing steam most live under a rock. Keep up the good work my friend and God bless. P.S. those 3 thumbs down must work for rockville.
I think they just don't know and have willful ignorance. Like the info sheets and website. That seems like a translated Chinese manufacture spec with some American editing along with it to make it sound legit. No one talks that way and I would be embarrassed to put my name on a product with a description like that.
@EMF are you subliminally trying to get me to want one of those hats at the end with the color change?? No , well it worked! Lol enjoy your videos and I'm glad I came across you keep up the awesome work!!
240C is 464F. Note my comparison was the coil, not the dustcap. Those are very different numbers you'll get. The claim was coil temperature so I tested the coil.
@@EMFAudio Paaa haaa haaa ha ha! It couldn't take 240 degrees farenheight! They can't even claim a typo as a saving grace. Maybe they can plead dyslexia as a defense and claim they meat 042 deg C.
I just noticed I said 350. I was trying to do quick math in my head while watching the video. I think I meant about 450. 464 is crazy hot. I’d think the paper cone would start smoking at that temp. Lol.
My friend had 2 rockville 15s. Pushing literally 2000 watts to them. 1000 per sub. Set with the correct tools. The subs caught fire and burned his car and everything inside it after an hour of playing. The setup was done correctly. He had the same setup prior to the rockville subs and was running them for a few months. The only thing changed was the rockville subs were put in. Paralleled at 1 ohm final impedence.
Then it was not installed correctly, Any one experienced can hear the subwoofer at its max lol. Or smell the coils. Or check the parameters and see it won't like 1,000 rms
Instead of ripping on Rockville in this comment, (as I usually do) I just want to say, that you guys at EMF are truly doing a great job. Really. Thanks for the time, effort and accurate information. How it should be.
It was badass that you checked the T-S parameters prior to break in. People have been VERY curious and asking for Thiele-Small for a while. Trust no one. I can surmise that the reduced damping of the elevated Qms caused the increased Vas. With time both may increase a little more. At least the sensitivity was a bit higher.
Yeah i would really like to see that TESTS done i heard some ok things about the Rockville Destroyer but that doesn't mean it will take the power that it says Either way i wouldn't buy one il stick with EMF AUDIO and SUNDOWN AUDIO there my go to car AUDIO company AMAZING PRODUCT AND AWESOME CUSTOMER SERVICE [✌🏽💪🏽🔈✌🏽💪🏽🔉✌🏽💪🏽🔊 ]
For some funny reason I want a EMF hat and lanyard now :) :) Exactly why I really like the 12s I have in my trunk build. They come from a great company that took the time to properly test and did not cheap out on the quality of the driver build. I have absolutely Nothing against any other brands (There are a ton of great companies out). But they have to be legit, this was a very nice presentation. I went for popcorn because very entertaining and the facts are there. PS I almost fell out reading the description too.
I believe the intent was to say it's an aluminum former with copper coil, but they also said it was a 240 degree American made coil which isn't not either.
Bruce is an awesome guy and he doesn't sugar coat anything when it comes to his reviews. I tried so many times to buy a Rockville K9 and they were ALL out of stock. I'm glad that they were after seeing Bruce's videos. I have a Rockville 15 in my wife's car, but it's in a tiny box powered by a terrible eBay 1200 watt amp.
EBay does not produce any products neither does Walmart. Both carry excellent equipment and garbage equipment depending on what you purchased from them which is why I don't understand when people say oh I got a garbage Walmart woofer if you go to walmart.com you can get just about any brand name woofer or any other component that you would like at a good discounted price with an honest return policy of 90 days. Just saying🤪
Nice test. I think what is going on is that, because of the constant 60Hz (without rest every second or so ), the voice coil does not get sufficient cooling. It is possible for another brand that it handles cooling different and not go up in smoke. It would be nice If you can give some more in dept background on cooling of a voice coil, would be great, because not much to find on the net about it. Thanks.
10:23 "failed under rated power" was the death knell for this entire brand. They have been exposed. Thanks for this viddy, I had never thought of some of your points. Two thumbs up
I had a W65K9D2 hooked up to a 600w 1ohm amp and bumped it from San Diego to Los Angeles and on the way back the surround ripped halfway off and I glued it back together with E6000 and it still bumps to this day! I got that magnet extremely hot after 6 hours of abuse with rap music. The max rated was 1000w but I'm surprised it can handle half of that.
I thought this too. It still means they aren't very involved in the whole process of designing, making, testing, and doing the paperwork. It all sounds like Chinese something.
Big D does the true test of power. Longevity is another issue. The rockville subs will run 2000 watts for a spl 15 second run so I guess technically they pass .
This is an off-brand company trying to come off like a name brand company the same thing that boss did when they labeled their Chinese merchandise they were trying to fool the public into thinking that they were actually getting Bose. This company is doing the same exact thing they're taking two name brands and combining them in order to fool the public that they're getting a name brand and then they're putting ratings on the box and on the instruction booklet which is an outright lie they sound horrible and that's the bottom line they're looking for maximum profit as when you go to China and have your name put on a product you can have the factory produce something however you like it they're capable of making all different levels of merchandise from the worst to the finest depending on whether you're looking for straight profit and a one-time kill or you want to get customers to keep coming back because they like the way it sounds it's not China's fault it's the companies that go to China and instruct the factories what to do what they're looking for I worked for a wholesale car audio company in Baltimore that got so big that we actually went to China and had their name put on DJ equipment woofers components and so on they got the name by driving past a car parts place that was called AutoZone we named our product A - Zone that's how it works people buyer beware. make sure when you buy something you can get a full refund this way if it blows or if it doesn't sound the way you want it to you can always bring it back and exchange it for a name brand pay the difference.
I loved every second of this vid man thanks for your time EMF and well done on a stand up analysis and breakdown of the speaker ...in a nutshell they're crap 😃😂😃😃😃
What a amazing test with incredible detail.. The amount of work and years of experience shine in this video. Too bad you have a legit business to run.. We need more people doing test like this on other brands but who knows.. Rockville should take you up on that r&d testing. They love your subs apparently.. Thanks for these EMF!
U MY FRIEND ARE AN ABSOLUTE GENIUS I LOVE THE WAY YOU SCHOOL THOSE COMPANY'S THAT TRY TO MISLEAD THE CONSUMERS IT'S SO AWESOME THE WAY U USE UR CALM VOICE I LOVE UR VIDEOS AND ALL UR PRODUCTS I GIVE UR VIDEOS 💯PERCENT 👍🏼👍🏼 [✌🏽💪🏽🔈✌🏽💪🏽🔉✌🏽💪🏽🔊 ]
I loved the changes yo the hat and beercozy. To address the team at Rockville I tend to think there in it for the job meaning there not true audio lovers. I understand as a company you gotta make money but I see the companies who succeed in this industry are guys who are in love with this industry. I loved the video. I thought the sub would let go around 600 watts on a tone. I still am left wondering if they will make changes or continue with this farce. Next we will see there boxes are cea rated.
You know Rockville will continue this K9 dick dance. They are in too deep now. They fucked up and now have to stand by subwoofers that were apparently not tested correctly before release. The refunds have to be epic scale.
Great idea, genius ways to upgrade your bad buying mistakes......they just need to duplicate the garbage and fix the problems, then they can profit on recone kits......all day long, night too
Lol, good god who wrote that crap??!! 😂😭ROFL Thank God 🙌 I never bought one!! How do you build a "black aluminum coil made out of OFC"???????? Lol, love it. I can't believe people don't see this stuff instantly. I guess they're aiming for the beginner bassheads!
As the old adage goes, you get what you pay for. Rockville is a flea market brand pushed my non-technical muppets which you can tell have never actually designed or installed a car audio system. The only reason that people buy their shit is because Amazon pushes them as a recommendation. In my opinion they are one notch above Boss Audio, which is not saying much.
So what I learned is on around 300 to 500 watts this subs good to go and sounds good as well. So know this going in and you're golden. Still not bad for just over 100 bucks. 🤷♂️👍
Brilliant....Relaxing AND informative. Good job calling them on their nonsense. Rockville Guys are business students trying to sell an inferior product to some bassheads who wont stand for their subs Fuckery. #emfratingstandard
So, it's basically a 600~750(?)W 12" sub for US$114? That's not too bad. Bear in mind that an Alpine Type R with the same RMS rating will set you back another $100 on top of that. Had they marked the K9 as a 600W sub, it's likely none of this bruhaha would be going on. (Interestingly enough, the Alpine Type R "black cone" version went through something similar, being a "1000W RMS" rated subwoofer that turned out to be more of a "750W RMS" subwoofer). Your measured t/s parameters for the K9 actually look better IMO than the published ones (lower Qts, lower Fs, higher efficiency). That high Le is a bit horrible though, and I'm going to bet that "28mm" Xmax rating is p-p rather than the more common peak rating (so "real" Xmax is likely half that). Excellent video BTW. I thought you were going to relate coil temperature to coil impedance and use that to determine when power compression started to exceed 3dB (at which point it makes little sense driving the speaker with more power), but that might have been a bit too technical for the crowd here, plus it's likely that coil's insulation failed before that point was reached.
Yup, nothing about this testing was good or bad it was facts vs claims. Though, power handling doesn't indicate performance either, it may sound like garbage, didn't get to critical listening.
EMF Audio that's crazy! They lowered the price I haven't check it in like a month but for a month these were higher in price! Maybe they came to their senses
@@jOhnVd0e yes i'd be curious if someone made a custom setup using the Rockville subs and seeing if a great or decent system is possible example Amp: 2X Orion XTR 2500.1's 3000watts@1ohm(tested by BigDwiz) each. Subs: 12 X Rockville K9 D2's only at 300watts each or 3600watts total all in an 35hz tuned 4th order. i mean they have done 137-142DB from a single sub so what would 12 do on low as hell power?
SA12D2** You said SA15. I know that doesn't matter and was petty to point out, just dont want anyone to hear that and try to discredit anything you said... you know the internet these days. Thanks for this video, though. Really enjoy all of your videos. I'm here every time you post a video. Love the information you share. Keep on keeping on. "Be excellent to each other and bass on, dudes!"
The Rockville employees had a bunch of opened beers scattered around them in their video. So they're drunk. I'm not mad now knowing that they're simply drunk while designing and testing their equipment. "Rockville, made by drunk's"
#emfaudiostandard every manufacturer should be testing how you test your equipment. Far and few between have the passion for audio like emf. Been a fan since the first batch!
Great video, very informative and helps those with limited knowledge gain more knowledge. Also the dude in the middle of the rockville video has his head down like he was embarrassed to be on the video.
Thanks for your honesty buddy I really really would have liked to like Rockville it'd be nice to have a company they had a fordable good subs for people that don't have the money to buy the expensive real Subs but do you want the good stuff you know what it is a dollar a watt
I'm late...I pretty sure you are right...but there are always little changes that make me question....There was an original 40Hz to 60Hz switch because it was "harder on subs". I get that in a certain enclosure it would move less and thus heat up more, but you never quantified why it was "harder". Then in this test you switched to a ported box...maybe you mentioned tuning...I don't know I had to fast forward alot...there was alot of exposition versus data. But what I don't see is you taking a your Lowballer sub and putting in the same enclosure, running the same test and it coming out unscathed at the point where the rockville dies. Overall, it really doesn't matter to me...I'm not buying a Rockville sub, the CEA/RMS/Peak BS simply ensures I will never buy one. But I might buy an EMF Lowballer if and when I take out my Sundown E15 v2 with my Skar 1500.1. But these videos give me no motivation to do such, because to the outsider they still only seem to be trashing a competitor and not actually proving your subs are better. Show me your subs performing the same test better and this 40 min video will mean something...
60 hz the sub moves less than 40 hz in nearly every application, the less it moves, the less it cools. I'm pretty sure that was mentioned in the video. The box is tuned to 30 hz I think, which again may have been mentioned in the video. To your own admission, you're bringing up things that can be answered by actually watching the video. In regards to doing the same thing with the Lowballer, you might notice the video isn't titled "which is better, a Lowballer or K9". The point of the video is focused on that sub and the claims of 2 other people, us being a third party. The Lowballer was mentioned as a point of reference in regards to what Rockville said COULDN'T be done, which can be, and it did. You didn't see us trying to show our subs are better because that isn't what the video is about. I'd recommend watching the entire video, starting with part 1 in it's entirety so you might understand why this video exists.
I wish Sean would stay with EMF. I liked the guy and his videos. Very informative and a straight shooter. I bet Sean could rebuild that bastard into something awesome.
So basically rockville subs might take that 1000watt cea rating but only with normal music not heavy bass stuff or you risk blowing it so there stuff is good for probly 70% of the car stereo market but not for the serious audiophile. Thanks for all your work on this Sean!!!! My little girl now want me to get her the pink emf hat when i order her lowballer for her civic lol
Oh snap, time to break out the fire extinguisher. Where there's Rockvilles, there's smoke!
Right, they should include one in the box
But they don't.... only thing that might have saved them lol
I absolutely love the subliminal messages to buy EMF audio you did there!!! BRILLIANT!!!!! 🤣🤣 (said in a calm smooth voice” 🤣🤣 had me cracking up at the end
Lmao!!
Did you notice him changing his emf hats color between cuts at the end.
I've got EXOs back all day long he's an awesome guy and I could watch his videos all day long❤👍🇬🇧
Thank you emf ..
Im glad you spoke up for EXO..
Hes a great guy and he was doing us all a service with education.. Just as you have as well.
No bash just plain out open up eyes where was needed.. I belive with all these faults you and exo pointed out ..You have done more than enough to help them fix and start over .. If the public forgives ... Skilled labor isnt cheap labor and cheap labor isnt skilled labor. EMF compliant only 😂
This is Bassotronics and I aproove this video!
Well done EMF! 👍🏻😎👍🏻
wait wait wait, didn't you make bass i love you?
@ *Bake Master*
A long time ago in a galaxy far far away...
@@Bassotronics 🤣🤣🤣
Rockville done 0 testing or research on their own woofers and it's biting them in the ass.Instead of going at their build house for sending them BS they go at the customers.🤔🤔
I told them a long time ago to get a test bench and test their shit.🤣😭😂😅😂🤣
They did testing, they tested if it fits in the box
Because it China 💩
@@jasonneal Sundown audio is from China and isn't junk. But Rockville is a scam
Tony Melo the problem with China made products is 98% of raw materials they get is not spect. The materials is not tested because who is making it has no regulations. That’s another reason why they can do it so cheap. For an example, they don’t X-ray their welds. Only because they don’t have to.
I broke out laughing when the emf audio hat just shows up on your head.
And changes colour =D
And changes colors lol
And the lanyard.
I thought I was losing it when a hat popped onto your head during your non-threatening voice portion of the video and then again when it changed colors lol.
Blowville needs to Just eat Crow and go back to the drawing board ...rate their subs at the point of stable and not at the point of where it blows and just Forget about the CEA rating. I have no clue why they're so stuck on that rating that means nothing they need to do some true real tests and give it an honest rating. And this is why the car community is so tough on this industry Because they're tired of getting taken advantage of from companies that pulls stupid ship like this and wasting our damn money on crap! Thank you so much for doing this EMF!
Blowville LOL
To play devils advocate even this test EMF did is misleading as the Q and resonance of the ported enclosure will have more to do with whether it survives or not. If the enclosure is being driven near its resonance, the sub will experience the least amount of cone movement due to the high Q there, and its impedance will be at its lowest point, and the current conversely at its highest. As the power dissipated increases with the square of the current (P=i^2*r), and theres a lot more of it now at resonance, the voice coil can rapidly overheat due to the relatively small movement of the voice coil combined with the high current draw. Theres a lot more to rating a sub then just what it can handle, and there's no real safe way to actually ensure a speaker will survive rated power in all circumstances. EMF's subs could easily suffer the same fate and fail below their rated power limits if the conditions are right.
If I was having trouble I would have no problem asking a successful company for advice as to why it's not working out but the people at rockville are just stupid plain and simple
CEA is for amps not subs and speakers. My brother used to have 2 ten inch Sony Xplods and he pushed 1000 watts on those 2 subs, it did not blow but made the voice coils hot but not hot enough to cause failure but it would still blow on a road trip. Sony Xplods are budget SPL subs able to handle a lot of abuse for it’s cheap price.
Buyer beware! You can only run boss amps on Rockville subs!!!
😂😂😂. I got 2 of there 10's. Both have there own amp. I got 2 rockford 600x1 amps they are taking a beating an holding. Now the ones i have are svc 4ohm shallow mount in a seald box. Been beating on them for some time now with no problem i play songs from 15hz to 60hz with no problem. I prefer a different brand but they are doing good so far. Ill putt them in a ported box an see how they hold up.
@@happys104092243 not saying they're stuff is shit... but you have to admit they're just looking worse every single time they try to "justify" their product
@@happys104092243 what model fosgate 600.1 amp?
they should merge and call themselves rockville bossfake
but power suckoustik!?!?
That was a very informative video.
It was funny when you were summarizing the testing at the end and you kept changing the koozie color and your hat color.
I think on the spec sheet aluminum coil is referencing the coil Former, and the wire itself is OFC. It does look like the former is indeed black. With regards to the cast aluminum basket increasing efficiency you can typically have tighter coil gap due to stiffer structure - so that does improve efficiency.
The gap has nothing to do with the basket. Suggesting you can have a tighter gap because of a basket would mean your top plate is flexible. If anything, the motor would provide the basket with more rigidity, not the other way around.
Next week Rockville will be available at all Walmart stores haha
That would actually likely be incredible for their business. It hits the target demographic while moving enormous volume. Returns would be the only downside.
EMF Audio ha!
@@EMFAudio Nah, the junk Pioneer amplifiers sitting next to them on the shelf would never have the power to blower them! Win Win!
@@KenMileyJr the Sony amps would....
At are Walmart in Missouri they sell them along with kickers
My underwear is cea rated, but only after I add homebrew racing stripes
😂😂😂
It adds 500 watts...
😂😂🤣
If you have two stripes that’s good for 1000watts CEA rated
EMF hat, drink holder, shirt and key chains.... dang you started representing hard at the end lmao. Can I join your squad? You make it look gangsta! We can pull up on Rockville right now and shake their building to the ground, I make the tracks and you bring the Boom lmao
Love the video and thanks for sharing!!!
Someone from Rockville already viewed the video, judging by the swiftness of a thumbs down. EMF Rollins has gotten under their skin.
Well looks like we’re up to 3 Rockville representatives at this point. That would cover the 3 q&a buffoons
/EnterTheGreyArea/ they have 32 employees I guessing of amount of likes under your comment they are clearly honest about that lol
Lol....emf Rollins , good one, cause I'm a liar!!!!
Thank you EMF, I've been in audio for 30 plus years and have never been so ticked at companies like the one you did on tested subwoofer, their are compliant testing and there is other compliant testing, but in the end it all comes down to what the real true power of the driver is really made to handle, true wattage will always prevail in real world settings, given you know the threshold of the units limit, again keep up the awesome work 👍
Off brand product fooling the public by combining two name brands people will say oh that sounds familiar I heard that before let me get one producing inexpensive Chinese garbage without doing any of the research and development themselves basically just Mass producing and copying all this hard work making a huge markup on their brand.
I am glad I subscribed to this channel. Not because or garbageville nonsense, but because of the true knowledge given and how you actually explain stuff. Actually makes me want to buy your products!
Apparently all that Rockville knows is imported beer...
It sux rockford fosgate is mentioned with those brands. I've had 2 p3 12's that's rated 600 watts a piece on a taramps hd3000 with the gain well over half wired to 1ohm for well over a year and they still sound amazing. Their amps do rated power to which has been proven.
Gain position IS NOT an indication of power output. You very well could be making 500 watts total in that gain position, or you could be clipping it to death from the gain position being too high.
I know gain is not an indication of power, I'm not trying to pretend I know more than u about this stuff because I don't but I'm not an idiot either . I was only saying wat I've had my taramps on over the years .and no I'm not clipping any of my subs . My whole argument is full bridge can sound good on subs and be reliable. I paid under$300 for both of my taramps and while your amp is better all around, at $500 for a 2k on sale for an EMF amp,the taramps smart 3 will always be a better value. I also have a stetsom vulcan 5k and the EMF 2k is still $100 more than the stetsom vulcan 5k while your amp is on sale. I'm not saying your amp isn't worth it ,it's just to expensive for a lot of us. U can keep speculating on wat u think clda be happening with my systems and my full bridge amps but nobody has ever got in my cars and not been impressed with how loud and how good they sound
I know your a car audio genius and I'm not being sarcastic,but not all of us are complete idiots when it comes to car audio. I'm only saying that because u capitalized IS NOT in your comment. Why can't u admit that a full bridge amp can sound good on subs I admitted your amps are superior and even said I'd trade my taramps for one in a heartbeat . But you keep trying to make me seem like I don't know wat I'm talking about any of this..I've always supported you and I never acted like an ass whatsoever so u don't need to do that
Sounds like Chinese translated. I’m sure it’s black aluminum formers with ofc wire. Either way it’s a junk sub that could’ve been a great bargain if they changed a few things.
Yea that what I said black aluminum former with ofc windings
Reminded me of the cool professor; we had fun and definitely learned something. This is a historic moment for car audio. There are those with the equipment to verify the quality of their purchases and share it with those who are at the mercy of a company. Those who say the hobby is loosing steam most live under a rock. Keep up the good work my friend and God bless. P.S. those 3 thumbs down must work for rockville.
I think they just don't know and have willful ignorance. Like the info sheets and website. That seems like a translated Chinese manufacture spec with some American editing along with it to make it sound legit. No one talks that way and I would be embarrassed to put my name on a product with a description like that.
Scosche is worse
@EMF are you subliminally trying to get me to want one of those hats at the end with the color change?? No , well it worked! Lol enjoy your videos and I'm glad I came across you keep up the awesome work!!
Not to mention emf builds some of the most bad ass subs you can buy.
240c is about 350f. 🔥 they were freaking out when the sa12 was warming up over 100f
240C is 464F. Note my comparison was the coil, not the dustcap. Those are very different numbers you'll get. The claim was coil temperature so I tested the coil.
@@EMFAudio Paaa haaa haaa ha ha! It couldn't take 240 degrees farenheight! They can't even claim a typo as a saving grace. Maybe they can plead dyslexia as a defense and claim they meat 042 deg C.
I just noticed I said 350. I was trying to do quick math in my head while watching the video. I think I meant about 450. 464 is crazy hot. I’d think the paper cone would start smoking at that temp. Lol.
Maybe they meant farenheit, instead of Celsius , its still junk sub
@@michaelwhouse46 paper burns at 451°F. It would most definitely be on fire.
My friend had 2 rockville 15s. Pushing literally 2000 watts to them. 1000 per sub. Set with the correct tools. The subs caught fire and burned his car and everything inside it after an hour of playing. The setup was done correctly. He had the same setup prior to the rockville subs and was running them for a few months. The only thing changed was the rockville subs were put in. Paralleled at 1 ohm final impedence.
Then it was not installed correctly,
Any one experienced can hear the subwoofer at its max lol. Or smell the coils.
Or check the parameters and see it won't like 1,000 rms
"Here we meet again in a non-threatening voice" Love that shit brother LMFAO! KEEP ON KEEPING ON
Instead of ripping on Rockville in this comment, (as I usually do) I just want to say, that you guys at EMF are truly doing a great job. Really. Thanks for the time, effort and accurate information. How it should be.
It was badass that you checked the T-S parameters prior to break in. People have been VERY curious and asking for Thiele-Small for a while. Trust no one. I can surmise that the reduced damping of the elevated Qms caused the increased Vas. With time both may increase a little more. At least the sensitivity was a bit higher.
Exactly
I appreciate that honest people like you shut the mouth of people who lies and lies. Thank you.
You have to test the rockville destroyer next to see if it destroys itself or others lol 😃😂😂😂😂😂
That would be awesome. Get the fire department on stand by.
The weird thing is that the destroyer does rated power, its only the K9 subs that are over rated.
Yeah i would really like to see that TESTS done i heard some ok things about the Rockville Destroyer but that doesn't mean it will take the power that it says Either way i wouldn't buy one il stick with EMF AUDIO and SUNDOWN AUDIO there my go to car AUDIO company AMAZING PRODUCT AND AWESOME CUSTOMER SERVICE [✌🏽💪🏽🔈✌🏽💪🏽🔉✌🏽💪🏽🔊 ]
For some funny reason I want a EMF hat and lanyard now :) :) Exactly why I really like the 12s I have in my trunk build. They come from a great company that took the time to properly test and did not cheap out on the quality of the driver build. I have absolutely Nothing against any other brands (There are a ton of great companies out). But they have to be legit, this was a very nice presentation. I went for popcorn because very entertaining and the facts are there. PS I almost fell out reading the description too.
Do they maybe mean it's an OFC coil on an aluminum former?
Wouldn't change much,
I'm just curious though...
Bernhard Ire , I’m almost certain that is what they meant. Somewhat poor wording on their part, but that’s not surprising.
I believe the intent was to say it's an aluminum former with copper coil, but they also said it was a 240 degree American made coil which isn't not either.
Yes they use a black aluminum coil former wound with ofc wire
Bruce is an awesome guy and he doesn't sugar coat anything when it comes to his reviews. I tried so many times to buy a Rockville K9 and they were ALL out of stock. I'm glad that they were after seeing Bruce's videos. I have a Rockville 15 in my wife's car, but it's in a tiny box powered by a terrible eBay 1200 watt amp.
EBay does not produce any products neither does Walmart. Both carry excellent equipment and garbage equipment depending on what you purchased from them which is why I don't understand when people say oh I got a garbage Walmart woofer if you go to walmart.com you can get just about any brand name woofer or any other component that you would like at a good discounted price with an honest return policy of 90 days. Just saying🤪
Damn bro! You had a Rockville sub shipped to your front door!? I hope none of your neighbors saw that! LOL!
These videos on youtube are starting to get really fun guys.
Lmao u will never get a t shirt
I honestly didn't think he wanted one or maybe to try and put out the fire from the stinkwoofer lol
Nice test. I think what is going on is that, because of the constant 60Hz (without rest every second or so ), the voice coil does not get sufficient cooling. It is possible for another brand that it handles cooling different and not go up in smoke. It would be nice If you can give some more in dept background on cooling of a voice coil, would be great, because not much to find on the net about it. Thanks.
I could probably do an entire Tech Stuff Tuesday video on that, which would be a good topic for next week, considering.
I knew Rockville was smoking Rocks. The way it exhaled that Smoke. #Crackville
Methville
EMF THE SUB WHISPERER. I hope one day to learn as much about subs as you know my friend I could listen to you allday lmao.
LOL, great low-key way to subliminally show off your merch at the end.
10:23 "failed under rated power" was the death knell for this entire brand. They have been exposed. Thanks for this viddy, I had never thought of some of your points. Two thumbs up
dude please do the same test on the rockville destroyer sub
I had a W65K9D2 hooked up to a 600w 1ohm amp and bumped it from San Diego to Los Angeles and on the way back the surround ripped halfway off and I glued it back together with E6000 and it still bumps to this day! I got that magnet extremely hot after 6 hours of abuse with rap music. The max rated was 1000w but I'm surprised it can handle half of that.
I think they meant black aluminum former the wire is ofc.
I thought this too. It still means they aren't very involved in the whole process of designing, making, testing, and doing the paperwork. It all sounds like Chinese something.
The wire is CCA, the former is cardboard.
Big D does the true test of power. Longevity is another issue. The rockville subs will run 2000 watts for a spl 15 second run so I guess technically they pass .
You mean a burp, which means nothing for power handling? Do you listen for 15 seconds at a time?
This is an off-brand company trying to come off like a name brand company the same thing that boss did when they labeled their Chinese merchandise they were trying to fool the public into thinking that they were actually getting Bose.
This company is doing the same exact thing they're taking two name brands and combining them in order to fool the public that they're getting a name brand and then they're putting ratings on the box and on the instruction booklet which is an outright lie they sound horrible and that's the bottom line they're looking for maximum profit as when you go to China and have your name put on a product you can have the factory produce something however you like it they're capable of making all different levels of merchandise from the worst to the finest depending on whether you're looking for straight profit and a one-time kill or you want to get customers to keep coming back because they like the way it sounds it's not China's fault it's the companies that go to China and instruct the factories what to do what they're looking for I worked for a wholesale car audio company in Baltimore that got so big that we actually went to China and had their name put on DJ equipment woofers components and so on they got the name by driving past a car parts place that was called AutoZone we named our product A - Zone that's how it works people buyer beware. make sure when you buy something you can get a full refund this way if it blows or if it doesn't sound the way you want it to you can always bring it back and exchange it for a name brand pay the difference.
@Rockvilleaudio, Where you at? Nothing to say? lmao
I've purchased 4 Rockville products from Amazon, all refurbished and all products exceeded my expectations
I loved every second of this vid man thanks for your time EMF and well done on a stand up analysis and breakdown of the speaker ...in a nutshell they're crap 😃😂😃😃😃
Another video, that was well put together. All the facts were laid out, then tested.
Lol. No more than 5% change in fs or it fails, but off by more than 5% out of the box.
What a amazing test with incredible detail.. The amount of work and years of experience shine in this video. Too bad you have a legit business to run.. We need more people doing test like this on other brands but who knows.. Rockville should take you up on that r&d testing. They love your subs apparently.. Thanks for these EMF!
You might notice a few different shirts, it's because I recorded footage over 4 days. Videos like this take enormous amounts of time to create.
@@EMFAudio My favorite was the ending with a new EMF item showing up in each screen cut. Those soothing talks always get me dien laughing..
@@EMFAudio and man we truly appreciate the time you took!!!
I wonder if Rockville or audio savings has any correlation with rock wood from back n the day
Rock wood is American HiFi out of California
Don't forget Kenford!
U MY FRIEND ARE AN ABSOLUTE GENIUS I LOVE THE WAY YOU SCHOOL THOSE COMPANY'S THAT TRY TO MISLEAD THE CONSUMERS IT'S SO AWESOME THE WAY U USE UR CALM VOICE I LOVE UR VIDEOS AND ALL UR PRODUCTS I GIVE UR VIDEOS 💯PERCENT 👍🏼👍🏼 [✌🏽💪🏽🔈✌🏽💪🏽🔉✌🏽💪🏽🔊 ]
I laughed out loud when I heard "black glue matters" 🤣😂🤣😂🖤
Youer insensitive to blm!..... But damn your comment is funny😂😂😂😂😂
Very educational. Wanted to laugh when out of no where a hat popped up on your head lol.
Here it comes can't wait, lmao cea rated made in USA
Great. Video was awesome wish UD bring back test Tuesday.
I loved the changes yo the hat and beercozy.
To address the team at Rockville I tend to think there in it for the job meaning there not true audio lovers. I understand as a company you gotta make money but I see the companies who succeed in this industry are guys who are in love with this industry. I loved the video. I thought the sub would let go around 600 watts on a tone. I still am left wondering if they will make changes or continue with this farce. Next we will see there boxes are cea rated.
In the live stream they talked about doing an "SPL rating" when nobody is using them for SPL and they're missing the point all together.
You know Rockville will continue this K9 dick dance. They are in too deep now. They fucked up and now have to stand by subwoofers that were apparently not tested correctly before release. The refunds have to be epic scale.
Thanks for putting the work into exposing them trying to lie to us .. good work man 🙂
BUILD A RECONE FOR IT!!
ROCKMF E9 12"
YES!
Yes!! Yess!!! Yesss!!!!
Great idea, genius ways to upgrade your bad buying mistakes......they just need to duplicate the garbage and fix the problems, then they can profit on recone kits......all day long, night too
Luv the shameless merch plug at the end while never missing a beat during the conclusion 😂😂😂
Lol, good god who wrote that crap??!! 😂😭ROFL Thank God 🙌 I never bought one!! How do you build a "black aluminum coil made out of OFC"???????? Lol, love it. I can't believe people don't see this stuff instantly. I guess they're aiming for the beginner bassheads!
As the old adage goes, you get what you pay for. Rockville is a flea market brand pushed my non-technical muppets which you can tell have never actually designed or installed a car audio system. The only reason that people buy their shit is because Amazon pushes them as a recommendation. In my opinion they are one notch above Boss Audio, which is not saying much.
Well I'm just glad you exposed their lack of knowledge misleading customers just to make a quick buck
A nice and informative video, loads of fun to watch. and nice product changes and kind of promotion at the end!
I need to sell my hcca and recone kit and buy some emf audio.
Sell it to me. On the cheap of coarse.
"Black glue matters" had me rolling!😂
He should rebuild it and show them how it's done
So true .as he said they nt paying him l
I have been thinking the same thing for months!!!
Emf Audio you are hilarious I loved this. I love your review of the spec sheet lol
Rockville may as well have made a video lighting them selves on fire. Because they committed suicide. I need to get some EMF!
So what I learned is on around 300 to 500 watts this subs good to go and sounds good as well. So know this going in and you're golden. Still not bad for just over 100 bucks. 🤷♂️👍
I would like to see the destroyer
Went from no hat to wearing a hat, I was like, WHOA. Not prepared for that.
Brilliant....Relaxing AND informative. Good job calling them on their nonsense. Rockville Guys are business students trying to sell an inferior product to some bassheads who wont stand for their subs Fuckery. #emfratingstandard
the petty and shameless brand plug was the best part.. going to your website now
Double Dare you to do more flea market tests.
I love the different types of merch!! Good touch!
CEA ratings mean ..
🙈⚡🔊🔥💨🔈❌
I like how your hat kept changing colors at the end there lol 😂😂😂
So, it's basically a 600~750(?)W 12" sub for US$114? That's not too bad. Bear in mind that an Alpine Type R with the same RMS rating will set you back another $100 on top of that. Had they marked the K9 as a 600W sub, it's likely none of this bruhaha would be going on. (Interestingly enough, the Alpine Type R "black cone" version went through something similar, being a "1000W RMS" rated subwoofer that turned out to be more of a "750W RMS" subwoofer).
Your measured t/s parameters for the K9 actually look better IMO than the published ones (lower Qts, lower Fs, higher efficiency). That high Le is a bit horrible though, and I'm going to bet that "28mm" Xmax rating is p-p rather than the more common peak rating (so "real" Xmax is likely half that).
Excellent video BTW. I thought you were going to relate coil temperature to coil impedance and use that to determine when power compression started to exceed 3dB (at which point it makes little sense driving the speaker with more power), but that might have been a bit too technical for the crowd here, plus it's likely that coil's insulation failed before that point was reached.
Yup, nothing about this testing was good or bad it was facts vs claims. Though, power handling doesn't indicate performance either, it may sound like garbage, didn't get to critical listening.
You make great vids sir. Had me laughing. Love it :-) nice hats and drinkcoolers?! though 👌
I can't believe they raised the price on these they should put it back to their 114$ and take away how much they raised the price haha
They're still $114 on their website, I bought at $114 through Amazon, not sure where you're seeing it higher.
EMF Audio that's crazy! They lowered the price I haven't check it in like a month but for a month these were higher in price! Maybe they came to their senses
i say $90 to $115 is reasonable if the sub was rated 300watts RMS & 800watts peak
Erik Britz true
@@jOhnVd0e yes i'd be curious if someone made a custom setup using the Rockville subs and seeing if a great or decent system is possible example
Amp: 2X Orion XTR 2500.1's 3000watts@1ohm(tested by BigDwiz) each.
Subs: 12 X Rockville K9 D2's only at 300watts each or 3600watts total all in an 35hz tuned 4th order.
i mean they have done 137-142DB from a single sub so what would 12 do on low as hell power?
SA12D2** You said SA15. I know that doesn't matter and was petty to point out, just dont want anyone to hear that and try to discredit anything you said... you know the internet these days. Thanks for this video, though. Really enjoy all of your videos. I'm here every time you post a video. Love the information you share. Keep on keeping on. "Be excellent to each other and bass on, dudes!"
Rockville's "will it blow" was an SA15, the live stream was an SA12.
Black Glue Matters
Dead ☠😂☠
Same!!
The Rockville employees had a bunch of opened beers scattered around them in their video. So they're drunk. I'm not mad now knowing that they're simply drunk while designing and testing their equipment. "Rockville, made by drunk's"
I think you're wrong. They don't design or test anything 😁
That’s why you don’t buy junky rockville
#emfaudiostandard every manufacturer should be testing how you test your equipment. Far and few between have the passion for audio like emf. Been a fan since the first batch!
If a company uses "beautiful" in their own description, stay away
Great video, very informative and helps those with limited knowledge gain more knowledge. Also the dude in the middle of the rockville video has his head down like he was embarrassed to be on the video.
He was reading comments, looking for questions I believe. There weren't too many questions being asked.
i will NOT use this subs ever even if i get them for free
Thanks for your honesty buddy I really really would have liked to like Rockville it'd be nice to have a company they had a fordable good subs for people that don't have the money to buy the expensive real Subs but do you want the good stuff you know what it is a dollar a watt
Rockville is a freakn joke dont buy it or any of it lmfao
Love the bottles of beers in the background in the Rockville video 😂😂😂
Wao, wao, wahaoooo! Awesome Video! Truthful to the Core!!! Love it! Keep up the good work Buddy! You're doing an awesome job!
I'm late...I pretty sure you are right...but there are always little changes that make me question....There was an original 40Hz to 60Hz switch because it was "harder on subs". I get that in a certain enclosure it would move less and thus heat up more, but you never quantified why it was "harder". Then in this test you switched to a ported box...maybe you mentioned tuning...I don't know I had to fast forward alot...there was alot of exposition versus data. But what I don't see is you taking a your Lowballer sub and putting in the same enclosure, running the same test and it coming out unscathed at the point where the rockville dies. Overall, it really doesn't matter to me...I'm not buying a Rockville sub, the CEA/RMS/Peak BS simply ensures I will never buy one. But I might buy an EMF Lowballer if and when I take out my Sundown E15 v2 with my Skar 1500.1. But these videos give me no motivation to do such, because to the outsider they still only seem to be trashing a competitor and not actually proving your subs are better. Show me your subs performing the same test better and this 40 min video will mean something...
60 hz the sub moves less than 40 hz in nearly every application, the less it moves, the less it cools. I'm pretty sure that was mentioned in the video. The box is tuned to 30 hz I think, which again may have been mentioned in the video. To your own admission, you're bringing up things that can be answered by actually watching the video. In regards to doing the same thing with the Lowballer, you might notice the video isn't titled "which is better, a Lowballer or K9". The point of the video is focused on that sub and the claims of 2 other people, us being a third party. The Lowballer was mentioned as a point of reference in regards to what Rockville said COULDN'T be done, which can be, and it did.
You didn't see us trying to show our subs are better because that isn't what the video is about. I'd recommend watching the entire video, starting with part 1 in it's entirety so you might understand why this video exists.
I wish Sean would stay with EMF. I liked the guy and his videos. Very informative and a straight shooter.
I bet Sean could rebuild that bastard into something awesome.
dude has a tea in a coozy ahahahah, best part, direct shot at those Stella swilling meatheads, bravo sir
So basically rockville subs might take that 1000watt cea rating but only with normal music not heavy bass stuff or you risk blowing it so there stuff is good for probly 70% of the car stereo market but not for the serious audiophile. Thanks for all your work on this Sean!!!! My little girl now want me to get her the pink emf hat when i order her lowballer for her civic lol
I'd like to see the Rockville Destroyer 15 tested with 4000 watts of 'program power'