Best Cheap Oscilloscope for Car Audio in 2021? Liumy LM2001 vs LM2020
ฝัง
- เผยแพร่เมื่อ 2 ส.ค. 2024
- Is newer better? Let's find out! In this video I compare the newest version of the Liumy Oscilloscope (the LM2020) to the original (The LM2020). After watching you will know everything you need to use a cheap oscilloscope to set your gains.
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Affiliate* links to products used in the video
LM2020: amzn.to/2O5Ofuz
Cheap Oscilloscope: amzn.to/2MMC8SO
Expensive Oscilloscope: amzn.to/3aBDVC4
If you need a coupon code to use at Parts Express you can find one at my blog: www.diysubwoofer.net
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Chapters:
0:00 Introduction
0:20 What's in the box?
1:00 Old Vs. New
3:10 Display
4:20 Oscilloscope Mode
6:40 Using the Oscilloscope
11:00 Should you buy the LM2020
*As an amazon associate marketer I may earn a small commission on qualified purchases. As an affiliate marketer I may earn a small commission when you make a purchase at parts express. - แนวปฏิบัติและการใช้ชีวิต
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Get an Oscilloscope here: LM2020: amzn.to/2O5Ofuz
Cheap Oscilloscope: amzn.to/2MMC8SO
Expensive Oscilloscope: amzn.to/3aBDVC4
I already bought the LM2020. Apparently I didn't know how to shorten the wave. Trying again brings experience. Thanks for the experience!
I'm glad you showed this video with these kind of scope! I have the Mustool brand and it looks like version 2.0 but it's autoranging, different layout up close. Top video. Cheers from Australia. Love your tutorials. Subbed and liked.
Yeah, these are great tools.
Great vid my friend, keep up the good work ! 😁
Thanks!
Great video and honestly seeing the video makes me more apt to buy this one lol.
Or grab one that looks just like it for half the price.
@@DIYAudioGuy i did this and it has worked a treat for gain setting to the point if an extra 2.5 volts over the ohms law and multimeter method and my system and others I've helped sound 👌
Great video
Thanks!
I ordered this scope because i needed to read more than 40 volts and the cheaper ones will not do that. I found that holding the f3 key will sort of auto adjust the scale. I get the wave to fit the screen to begin with, the wave is usually smaller on the screen at 49 volts using the 10x and 1x/3x buttons. Then i hold the f3 and it shows the wave form going off the screen. When i cycle through the scales this time, the wave form ends up fitting much better. I do have to cycle through the 10x and 1x/3x option to get a good fit. Only this time the wave form is scaled much better. I noticed that this works for reading smaller voltages . When reading the rca voltage that is under 2 volts. That method seems to make the wave form easier to read. My amp has a clip light and i cant see clipping on this o scope until the light is solid and is in hard clipping. The 1% clipping that my amp detects does not show up on this scope. I dont think you could see 1% on any scope. At least i know the flashing clip light is a "soft clip" and a solid light is well into clipping.
I bought the Mustool scope meter a while back. It would probably be similar to the 2.0 version. Not bad for 50 bucks on banggood. Perfectly fine for setting gains. Like most of these scope meters the battery doesn't last long, but for occasional use it isn't too bad.
Back in the day oscilloscopes were expensive machines that sat on laboratory benches. I find it amazing that for under 200 bucks there's a wide selection of perfectly fine functional handheld oscilloscopes.
Great demonstration! Are these True RMS volt meters or not? Also the screen resolution on both is the same? 320x240?
They are supposed to be True RMS, but I don't really trust that they are. The screens are about the same size, but the new one has more pixels, much higher resolution.
rms is just as good as a fluke on the 2001
I picked up this Metter a month or so ago.. it will auto range if you press the S button while in o-scope mode and give it about 10-15 seconds and it'll auto range.. glad to see someone made a video on this model
Now that is a pro tip right there!
Awesome video I have a handheld fluke multimeter but I have been looking for a smaller easier unit.
I think it's really cool that we've got all these cheap oscilloscopes on the market. I just don't see the reason why you'd pay $80 or $90 for this one when there's another one that looks to be exactly the same for 40 or 50.
@@DIYAudioGuy I agree. And at $40 or $50 you cant go wrong. I dont mind dropping a $50 o scope vs the $1300 fluke lol.
Would it be better to invest into a DATs 3? Considering it's mainly for audio measurement
@@st170ish A DATS cannot detect clipping.
@@DIYAudioGuy Dats has an oscilloscope built in, I can't vouch how good it is
I've actually been looking at one of these and this exact model.
Heard this is like a copy of a copy of a copy but it should be good enough for setting gains and looking for distortion.
It's like a movie about a dude playing a dude that's disguised as another dude.
Liumy is the first company to make them.. buy some good leads if your gonna use it daily mine fell apart day 4 but I reached out to the company and they said they wanted to make it right.. but besides that I've been happy
@@lagginlycan159 Good to know they stand behind their product.
@@DIYAudioGuy I need to pick up this device soon so I can check my iNuke3000DSP and see how clean it is.
I just did some measurements using my microphone and found the distortion is pretty tame to 25v on a single channel. Any harmonic distortion is over 30dB lower than the sine wave. This matches up with attaching a capacitor to a speaker and listening for distortion so I'm pretty happy these match up quite closely.
Increasing the volume by 1dB to 28v harmonic distortion (2nd and 3rd) is now within 30dB of the fundamental tone.
Increasing the volume by 1dB again to 30v 2nd and 3rd order harmonic distortion is now 24dB and 27dB from the fundamental tone.
And one last time pushing it up to 32.5v (+1dB) 2nd order harmonic distortion is within 18dB of the fundamental tone. And pretty noticeable at this point. I stopped here because the Subwoofer was making unhappy noises because the amp was out of gas.
This was done on my Ultimax 18 and was well under 1/4th the subs rated power so this should be all Amplifier distortion. Curious what the scope would show at those voltages and wonder where clipping actually is.
Id much rather use this then do all the math on the other vid that made my head spin especially when it damn near exploded trying to make sense of the cross over points vid. very helpful dont get me wrong but those vids were a bit too much for me. maybe in person itd be easier, just not my learning style so this oscilloscope vid was a big relief.
Thanks for watching.
Thanks for the review! I picked one up after watching your review. I was just wondering if you can help me with a few things as I haven't used a multi meter in a long time. Measuring DCV on a router, and you want to set the limit of voltage is it possible to limit it to max voltage at 10 Volts? The only way I can explain it is with an analog meter (This model: de-960tr). I just need it to be more precise. I couldn't find any settings to manually change it.
I don't know if it set in 'Auto' will perform in that way or not. Last question is, I had both leads setup on the 2 far right ports from a different review I seen. I'm really confused at which ports I use for things that are low voltage / low amps. Can you recommend the correct way to have those setup? Either that, or if you know of a guide / tutorial that can teach me about it. Much appreciated.
The LM2020 is auto-ranging so so you just set it to the type of voltage (AC or DC) and you should be fine.
Looks like a nice scope. What is the maximum peak-to-peak voltage that the stock probes support?
I would have to look that up -- hope I saved the owner's manual.
I have version "2.0" and reading distortion on the waves can be tricky just like shown on version "1.0". The display on "3.0" seems to be a good improvement over the others.
I'm still a little bit perplexed by it. As you saw in the video right before the wave went square it started to get fuzzy at the tops and bottoms of the wave. I'm not 100% certain how flat the top needs to be before I can call it clipping. At this point the only thing that the scope has going for it is that it is a lot cheaper than a DD1.
@@DIYAudioGuy yea if you aren't doing much amp installs then a DD1 is a real luxury. As much as I'd like one I still can't justify the cost just yet... especially when for me the cost is double in my local currency.
@@dna59 Ouch!
yeah on my 2.0 i feel like im still guessing but on a more professional level of guessing
@@mcf3778 hahaha you are correct. Usually I workout the maths of doing it with just the multimeter and then cross reference that with the oscilloscope and it's wave and voltage reading. Gives a better idea than just using 1 or the other.
For the oscilloscope vertical sensitivity, you can also use the X1/X3 choice to get a three times change for sensitivity no matter which of the X10 settings you are on. This gives you more choices to have the waveform more fully fill the screen. The X1/X3 button toggles back and forth between the two choices and the volts per division indication changes accordingly. Most scopes have a "1, 2, 5" sequence for this. This has a "1, 3".
Yeah, you you have to fiddle around with it a bit.
Great video, just getting into the technical side of car audio (been installing since early 2000s) and building my own subwoofers etc and this video is exactly what I needed, ty! Do you also have a video on a cheap diy Gaussmeter? Trying to measure the magnetism on my Alpine SWX-1243D motors, and maybe find a place in Central NY to charge them (anyone know a place?) def subscribing, this info is golden!
That is a cool idea. I would not even know where to begin.
I have the 2001 version and works fine but the screen is so low on resolution that sometimes i cant tell if it is in fact clipping or it's just a lack of pixels to visualize the round curve. But overall does the job
I had the exact same problem. I had planned to do some videos on setting gains with the 2001 but they came out looking like crap. The 2020 is not perfect, but it shows up better on camera.
@@DIYAudioGuy oh well,i think i'll have to buy the 2020 then 😂
Do you know a method to spot clipping without any instrument? Years ago i saw someone use a filtered twitter that would make noise whenever the amp reached clipping,i don't know if i remember right but it could be an idea for another video 😁
@@ilfaraone58 That was Sam, his TH-cam channel is barevids. That method will work. It's basically a harmonic distortion detector. When the amp clips it will produce stray signal and all of its harmonic frequencies. The bass blocker on small speaker keeps it from blowing from playing bass. I could probably build one from spare parts I have lying around, just would need a capacitor of the right value.
@@DIYAudioGuy wow nice! Thanks for the info!
MUST-TOOL DO AN IDENTICAL VERSION OF BOTH THESE METERS. I HAVE THE MUSTTOOL VERSION MYSELF. GOOD METER BUT IT CAN ONLY SHOW YOU AN AC WAVEFORM WITH NEXT TO NO INFO. SO WILL BE LOOKING FORWARD TO SEE WHAT THE UPGRADE CAN DO..
👍
i just got a car and i'm upgrading the audio last owner upgraded the head unit and i found a 600w sub amp for cheap that i'm thinking of using but i'm wondering if i can for example mount some a pair of 6" subs underneath the driver and pasanger seat. i think i canf it a box the correct size unde there. my car is really small and i dont want to use up my small trunk so i was wondering if putting them closer and smaller would make them good enough. so to make it more clear i wand 4 6" subwoofers or would i rather want to figure out a way to mount 1 10" sub per seat
It all depends on how much airspace you have underneath the seat. It takes space to make bass. If you can get half a cubic foot per side that would work really well with a small driver. I would not try to cram anything bigger than a single eight under a seat. I think the woofer that I used in this video here along with the passive radiator might give You the results you're looking for. th-cam.com/video/xip5zUoZsQY/w-d-xo.html
They also sell 5 and 1/4-in version that might work even better. If you order from Parts Express make sure you check out my blog, I've got a few discount codes posted over there.
have you considered a compressor for your microphone?
I will look into it, thanks.
Hey DIY guy. Has anyone told you look like Captain Spalding from the Rob Zombie movies.
Yes, I have heard that before! I take that as a complement. SId Haig was a badass.
What's the matter kid, don't you like clowns?
The one that you have linked is a different brand, will this work as the one you showed or no? I need one asap cause I just can't hear distortion period. Idk why but in my 20+ plus years of doing car audio I've never been able to tune. I can install it all day long but someone else has to tune it when I'm done lmao.
According to amazon that is the one I bought -- from what I can tell they all work the same.
@@DIYAudioGuy awesome I'll get it shipped out and do mine when it arrives!
I tried setting my gains using this oscilloscope. I set all my settings on my stereo to the required settings and used a 40hz test tone off of TH-cam. As I adjusted the gain up the waveform went completely out of the screen and I don't know how to adjust the oscilloscope so that i can see the waveform flatten at clipping while still inside of the screen. What do I need to do?
I watched this video and apparently I didn't know how to change the waveform, but this video helped tremendously. Thanks DIY Guy!!!!
Version 1 the frequency range will jump around
I noticed that!
he doesnt show you where on the amplifier to cannect the oscilloscope, so its pretty much just a bunch of jibberish if you have never done this, so i guess my question is does it connect to the speaker terminals on the back, or inside the amp somewhere?
th-cam.com/video/oBNETr9AHwA/w-d-xo.html
Well, I cannot find this scope available for sale anywhere. Can you recommend a similar scope for amp and speaker tuning only? Any thoughts on the PICOSCOPE 2204A?
According to Amazon this is the one I bought.
amzn.to/3yBbscW
It appears to have a different name this time. Not sure what to make of that.
@@DIYAudioGuy Excellent. Thank you. Do you have an opinion on whether it is worth a DSP in a portable box for the beach, or just tune it well with the scope? Thank you again for all the wonderful information.
@@seanyounk1 Probably not, but if you want to go that route then this is what you want: bit.ly/3PZ2ixD They have battery boards that plug into the amp boards. Perfect for portable boomboxes.
@@DIYAudioGuy Wow! Those are really neat. I would have definitely gone that route accept that I already bought an NVX VADM4.
I have book marked that board for future projects. Thank you so much for all your wonderful infomation. I will send you pics when my project is done.
@@seanyounk1 Awesome!
Why the hantek 2d72 over the liumy 2020?
Two input channels and a signal generator output.
PLEASE tell me why I can’t get my oscilloscope to give a clipped signal!??? I have done bought 2 different O-Scopes and neither will show! I’m running a taramps big boss 3 with a resilient sounds 15 dvc 2ohm with 1/0 gauge OFC power/ground and ground is good! I just can’t seem to get a clipped signal on neither O-scope! I bought the FNIRSI 2C23T & AUKUYEE Updated 2.4" TFT Digital Oscilloscope! My amp and bass knob shows clipping but won’t show a clipped/squared-signal! I was running a KICKER LOC and bought another, the PAC LP7-2 because you can control the gain on it, itself! But I can’t even get a clipped signal on it/head unit ALL the way up on a factory Bose HU/system! PLEASE ANYONE, ANYTHING HELPS!?
I'm not sure what to tell you. If I could physically put my hands on the equipment I might be able to sort it out, but it's hard to troubleshoot across the internet.
What's the best subwoofer you've owned to date ?
That's a really hard question. For starters I have not really owned that many subwoofers. I tend to hold on to my gear for a very long time before I upgrade or replace it. I've really enjoyed my Polk Audio DXi 10s, my Dayton Audio Ultimax 10 with the passive radiator sounds fantastic. But, my favorite always has been and always will be the 12-inch Blue Thunder I had in college. That has nothing to do with sound quality or SPL, it's all nostalgia.
@@DIYAudioGuy I had some MTX Blue Thunders back in the 90's 2 12's in the back of a Ford Escort I was pushing them with a Rockford Fosgate Punch -150 with Pioneer 6 1/2's in the doors I absolutely loved that little set up I had it for a good 5 yrs lots of keg parties out in the middle of nowhere That system put in some MAJOR entertainment hours 🔊🔊🔊👍🏽
@@redman4076 Hell yeah!
Is there one of these for 2023
Not that I know of.
These days you need an o scope to set your Gains. Even top quality company’s will have over rated output claims. You can set your gains by voltage but only if you really trust that specific manufacturers ratings. All electrical systems will be different as well some cars don’t charge at the 14.4 that amps are rated at . O scopes will tell the truth with no guessing. Everyone needs one
And they've gotten pretty cheap, so if you're going to set up more than one amp ever in your life you may as well grab one.
Why did you so no to both? How would you see clipping on a factory radio if you're doing an integrated system?
Because you can get one that is just as good for under $50. You just need to probe the factory speaker wires to check the factory source for clipping.
@@DIYAudioGuy this is true. Thanks for the response ♥️
@@SuperHondaFitDriver Thanks for watching! Hope that you got something useful out of the video.
@@DIYAudioGuy I always do! Love your content and I live that you price conscious! Value is everything!
@@SuperHondaFitDriver for real man, money does not grow on trees!
How about the DSO nano? Is it any better?
I have not tried it.
I have the version 1.0 But its the MUST-TOOL VERSION (the MT 8205) good meter but biggest problem is when the batteries start to run low it can give readings off by up to 3 volts. {"SO LOOK OUT FOR THAT IF YOU HAVE ONE"} Plus it's not a proper scope. It only lets you are an A.C. wave form.. and badly at that. No time form, vpp, trigger of any kind, (unless you count the auto button.) But with fresh batteries its a bang acurrate meter. Don't know anything about the 2.0 version in this video. Sorry. Hope this helps.
P.S. that was the first meter I bought when I first started learning electronics. By the time it arrived I already need a proper scope. And was sorry I bought it. (My little DSO shell 15001K serpassed it a 1000 times😅 & that's saying something for a scope that only cost me €14 & 60ç)
The wave will always be flat bro.. the pixel is flat lmao and very large on that device. I like the screen on V3 but I love that ruggedness of the V1. I think most people buying will go for the cheaper version
Are those really worth the price
I give my opinion in the video.
i paid $80 for my 2.0 so ill say yes... i also have the liumy ac/dc clamp i paid $100 and they make a great team
I did not know they made a clamp meter, I may need to check that out!
cmon DIY Audio guy, your audio seems to be bad in most videos. This one is only going into my left ear, and sounds like you are behind me
After watching more, it only appears in part of the video. Maybe a different cam/mic?
I'm going to blame it on a bad patch cable. I was trying something different and it did not work well, lesson learned.
And in this video he admits later he was wrong. There are some pros to the digital multimeter way. But the oscilloscope liumy is so much better. I have found out my sub amp puts out 2000 rms per sub even max 2500 if I'm competing and everyone feels it and hears it. Without this device and basic math I thought I had to upgrade to 2000rms sub.
Was I really wrong or was I just trying to make it dramatic for the camera?
@@DIYAudioGuy U got me, Dramatic, but its personal preference u ask me. The liumy seems better. Multimeter is safe, but it has one to 2 to be on safe side.
2.0 version is better it has the hold button
Also a lot easier to read.
i also still cant read it.... top of the wave still gets wonky
Audio to low
Bad, bad,bad option
Affordable and effective.
Great video
Thanks!