I’ve watched dozens of videos on this exact topic, and always wondered why no one was trying to cover the rigid fibreglass without a frame. You get my subscription based on that alone, but then the fact that you went way over and above and were so thorough and so detailed and did such an excellent analysis that I’d get two subscriptions if I could! This was the first video of yours that I’ve seen. I will be watching more. Thank you so much!
Disagree. The corning 703 NRC is only good if unfaced, and you're left with dealing with naked fibreglass that you need to paint to make safe. Even in his own video, look at 12:45. There's a ton of loose fibres all over the weed barrier. That's a big red flag that could lead to lung and eye irritation in the future. I agree this is one way to create frameless panels, but other materials exist. Open cell foam is a much better material, in both performance and safety, but it's incredibly expensive compared to fibreglass. Another option is recycled cotton, which is already very stiff and has amazing NRC properties. You could sure it up with simple precut battons and glue if you don't want to use any tools. Again, I think he's made a good video and this is certainly a good option for a no-tool project, but I don't think it's the best as fibreglass is quite a hazardous material which is often glossed over.
I'm an aspiring VO artist, and I'm getting ready to rebuild my vocal booth into a legit booth. I knew how I was going to do the actual construction, but I was really on the fence about how to sound treat it - I felt I wanted a better solution than the cheap foam tiles I used for the original build. The 705 panels look like they are going to be the answer I was looking for to get me where I want to go - no framing, no messing with Rockwool, (that will go in the walls) and something I can do easily on my own in my garage. Thanks for this!
this is probably the most honest and optimal review which gets straight to the point, but gives all the technical detail you can go back to. we appreciate you Walt.
This is the only DIY acoustic panels that I would actually consider making. Like idk why so many other TH-camrs are like "Hey you can do this yourself!" but then go to their professionally equipped workshop and wip out their table saws, staple guns, and work benches. Like bro I don't have any of that and never will.
Regarding at time 9:30, NRC is the noise reduction coefficient. Reason conflicting data is that in ASTmC423 the RC rating is always rounded up to nearest 0.5, reason why it has NRC 1.05. Anything above 1 is 100% absorbing average, between 250 Hz to 2000 hertz. First NRC results, 250 Hz was at 0.71, whereby the 2nd NRC detail 250 Hz was at 0.78 which is why the first detail has a lower NRC at 0.95. This most likely from two different tests, showing that test retest reliability is off by about 10 but in reality the difference is negligible. Depending on the application, I look at the lower frequencies, with the thicker the absorptive material, the better it has at lower the frequencies. AS you had the panels on standoffs also increased their absorptive efficiency and NRC.
You make good points. I was impressed that you were not steered by opinion and bias towards mineral wool for sound absorbing panels (where fireproofing and soundproofing density it's not a strong factor), but use the NRC rating for sound absorbing quality. I liked your idea of keeping things simple, for a garage or working shop area, where bumps and rigidity for moving around isn't needed.
Really good video. I'm building a large garage, 30' x 40', with 10' walls. We used a scissor truss to give us a vaulted ceiling. The walls and ceiling are plastered. You would not believe the echo. I'm going to have to do something to address it. This looks like an excellent solution.
Wow, thank you. This is exactly what I'm looking to do. My kids are starting up a garage band in our garage and I need some simple diy sound panels that I can make myself without tools, so this is awesome. You explained everything so well, thank you!
GREAT! Thanks so much. I finished my (rockwool) traps , now moving to panels. You just convinced me to skip the frames & go with rigid boards. Much easier.
Going with the 703, but have an idea to fix the imperfections or at least hide them...frame the panels with Cardboard. Salute to you Walt, I've done overly extensive research on and off for the last few years, never quite finding a perfect/cheap DIY solution...until watching this video. You answered every question I had before i got a chance to google it. Thank you Thank you Thank you
Great content man. My 2cents from experience: the frameless coating works. Yes u gonna need more than suggested. Also 705 dont come in 4 in thick from most sellsers...i coulbe wrong but its hard to find. . Also u sprayed the whole panel with adhesive. 😂. Spay just the sides with adhesive.
This is an excellent video, i am going to make a cheaper version right now as each panel currently is looking at 25$ for just the OC 705 but this is a phenomenal idea
Cool video if you don't mind my suggestion but when your working with spray glue you must let it tack up prior to adhering it for future reference and for others let it sit for a few min and then put it on it will last much much longer appreciate your time making the video great ideer frameless
Agree with others this is the best video on this topic. Where can I find information on the impact of distance from wall or ceiling? I need to place panels on a ceiling to reduce standing waves, but space is limited.
Great video! The black fabric you put on the back, is that acoustically transparent too? One huge thing (you may have mentioned) is when you put these away from the wall/ceiling surface you can get twice the absorption as the sound passes through twice (provided that black fabric is breathable)
Hey Walt, thanks for an awesome video! I'm thinking of making some for my new place but I have one fear: Do the panels "leak" any glassfiber/stonewool through the fabric over time?
Amazing. Absolutely awesome. Thanks to you, I just purchased two packs of 705 from acoustimac! I can't thank you enough. I have one question, what size print did you buy from Big Wall Decor? The fabric you got from them fit your panel perfectly.
Approximately how much does each panel weigh? Do you think they would stay up using a few of those 3M plastic velcro type tabs to avoid the need to put holes in the wall? Thanks! Great video!
Been thinking of DIY acoustic panels, and wondered why there couldn’t be a solution without a frame. Not that I couldn’t make one, but why would I mess with it if I don’t have to? Thank you!
Hello Walt Could you test out how to Reduce the DB levels on a mitre Saw one Source besides the motor is the Blade which is like a Cymbal from a Drumkit which rings every time you lift the Blade after cutting your cut.
Please clarify a mistake made around the 12:12 time of the video comparing the edges of two different panels, when you call them both OC705. Did you mean to say the panel on the left is OC705 without edge coating and the panel on the right is OC703 with edge coating?
And thank you @Waltsreviews for the correction; I noticed there were a couple of other slip ups that you didn't correct too. Just a friendly suggestion to listen critically before final uploading. Cheers and thank you for the weekend project!
This is a really helpful video! I have textiles from all over. Is it possible to use hand woven cotton textiles, for example, something like bogolan mud cloth from Mali or Kente cloth from Ghana?
You mentioned puncturing with spikes for hanging. Are you puncturing all the way into the slab and is it sufficient to hold the panel from falling from the ceiling? Thanks
A note for anyone making this in the future (Especially if you arent in USA) once you factor in price of Impaler clips, Cloud anchors, a few cans of Spray adhesive and the Fibreglass paint this isnt cheaper than going the wood panel route
How is the smell? I have noisy apartment neighbors and want to make some for my bedroom. Does this method result in a panel with a strong "chemical" smell?
Sooo... how safe is this, though? Fibreglass is nasty stuff. I can see a ton of yellow fibres that are stuck to the outside of the weed barrier at 12:45. You don't want those loose fibres in your space. Also, since the boards are very stiff, doesn't this cause some high-frequency reflections and reduce it's performance as a good studio panel? Looking at the NRC, over 2k has a big drop in performance. I've seen people using recycled cotton (jeans) as a high-density filler that offers the same properties as fibreglass. It's more expensive, but it also comes in quite rigid boards. I imagine you could glue some thick card to the corners and achieve a similar build with no hazardous materials and no need to paint it.
Thanks for the video. I want to make a frameless acoustic panel like yours but I'm thinking of sewing the fabric onto the fiberglass, rather than glueing it with adhesive spray. I know it will be a lot of work with the needle and the thread, but wouldn't it be better that way? Because glueing all sides of the fiberglass would make it stiffer and maybe reduce its absorbing quality... What do you think??
I don't think stiffness effects the acoustic properties. I say that because fiberglass boards and way stiffer than mineral wool but comparable in noise absorption. So not sure if the extra time is worth it for functionality, but if you prefer the look or method, its not a bad idea.
GREAT video! I will be building panels this weekend based on this video. Question - I would like 4" panels for better low frequency treatment. Can I sandwich two Owen's Corning 705 2'x4'x2" panels or would I be better off with Owens Corning 703 4" panels? I am unable to find 705 panels 4" wide, but I'm thinking the 705 panels being more dense would be better than a 4" 703 panel?
The cost of these has more than doubled since this great video was made. Amazon has the 703 at $125 for 12 one inch with free shipping. Considering gluing two together making it two inches thick. Any thoughts on this?
Opens with "save money while being lazy" I'm in. I'm building a frame type because and I've come to find out you can usually ask the lumber department in your local lows-type store if they have any scraps for sale on discount... Step zero: material acquisition XD
Is it safe to install these panels in a bedroom? I noticed that you were wearing a mask when handling the fiberglass panels. Does the fabric do a good job at containing the fibers?
We didn't notice much fiberglass getting kicked up. Masks were largely worn because we were using spray adhesive. It's still probably a good idea to wear a mask when dealing with fiberglass panels, but you should be safe once they have fabric wrapped around them.
Do your health a favor and don't use unsealed fibre glass in your living room. You can also achieve great results with natural dampening materials like hamp or coconut.
Theres alot of bullshit out there. This isnt that. Thanks for the video. Guys even building your own plan on spending around 1k to get any results in a big room plan on spending 2k. Sound management is expensive..if u have a 3k system. You can pretty much plan on spending close to that to get the room right. If you dont....you might as well have a 300$ bluetooth speaker crank it up and call it a day... ......! if your trying to build cheap panels they dont exist. ! Youll waste your money with skimpy foam shit.. You wanna learn acoustics. Soundproof the laundry room door. Youll have a hundred in it before you realize your not doing shit...hell it costs about a 100 just to isolate the washer and dryer from the floor. In a 2 channel hifi or theator room (mines 19x40x9) with a 7x10 knook in the middle of one of thelong wall. Room acoustics are pretty good with the furnishings and no treatment. Im blessed with a good basement mancave. And im looking at spending $2500 total .....to safe and sound the open joists for 350 square feet. And just use insulation the rest of the way. Then another 150 or so square feet of panels for the walls. Good heavy Rugs for the concrete floor (2 big ones for front wall and two little for rear wall bass traps.) And thats not really paying any attn to looks. Just wrapping pannels in generic thin cloth. Cheapest way thatcwould almost be free. Get all your old coats and clothes. hang clothes rods and hang all your clothes along the walls. 2 for one deal. Then u free up your closet for a grow-op. Lol
I’ve watched dozens of videos on this exact topic, and always wondered why no one was trying to cover the rigid fibreglass without a frame. You get my subscription based on that alone, but then the fact that you went way over and above and were so thorough and so detailed and did such an excellent analysis that I’d get two subscriptions if I could! This was the first video of yours that I’ve seen. I will be watching more. Thank you so much!
Same
Hear here! This is a terrific explainer. Nicely done.
This is better and cheaper th-cam.com/video/pABvTWSxOes/w-d-xo.htmlsi=nJErYN4eOJlyCAam
You have captured the essence of being a genuine youtuber. Thank you, I’m going to try this method.
Commenting for the algorithm cause this is by far the best video out there on sound panels.
Agreed. And I’ll be using the methods at the start of the video for ceiling panels cause it just makes sense.
Agreed, commenting for the same reason
Disagree. The corning 703 NRC is only good if unfaced, and you're left with dealing with naked fibreglass that you need to paint to make safe. Even in his own video, look at 12:45. There's a ton of loose fibres all over the weed barrier. That's a big red flag that could lead to lung and eye irritation in the future.
I agree this is one way to create frameless panels, but other materials exist. Open cell foam is a much better material, in both performance and safety, but it's incredibly expensive compared to fibreglass. Another option is recycled cotton, which is already very stiff and has amazing NRC properties. You could sure it up with simple precut battons and glue if you don't want to use any tools.
Again, I think he's made a good video and this is certainly a good option for a no-tool project, but I don't think it's the best as fibreglass is quite a hazardous material which is often glossed over.
I'm an aspiring VO artist, and I'm getting ready to rebuild my vocal booth into a legit booth. I knew how I was going to do the actual construction, but I was really on the fence about how to sound treat it - I felt I wanted a better solution than the cheap foam tiles I used for the original build. The 705 panels look like they are going to be the answer I was looking for to get me where I want to go - no framing, no messing with Rockwool, (that will go in the walls) and something I can do easily on my own in my garage. Thanks for this!
this is probably the most honest and optimal review which gets straight to the point, but gives all the technical detail you can go back to. we appreciate you Walt.
This is the only DIY acoustic panels that I would actually consider making.
Like idk why so many other TH-camrs are like "Hey you can do this yourself!" but then go to their professionally equipped workshop and wip out their table saws, staple guns, and work benches. Like bro I don't have any of that and never will.
🤣 i thought the exact same thing. Like bro I dont have a Pro Angle-grinder
Indeed, best video on the subject on the internet right now! Impressive! Thank you!
This video was excellent on all fronts... From the cost analysis to the how-to section. Thanks for this!
Regarding at time 9:30, NRC is the noise reduction coefficient. Reason conflicting data is that in ASTmC423 the RC rating is always rounded up to nearest 0.5, reason why it has NRC 1.05. Anything above 1 is 100% absorbing average, between 250 Hz to 2000 hertz. First NRC results, 250 Hz was at 0.71, whereby the 2nd NRC detail 250 Hz was at 0.78 which is why the first detail has a lower NRC at 0.95. This most likely from two different tests, showing that test retest reliability is off by about 10 but in reality the difference is negligible. Depending on the application, I look at the lower frequencies, with the thicker the absorptive material, the better it has at lower the frequencies. AS you had the panels on standoffs also increased their absorptive efficiency and NRC.
Thanks for the video! I love the idea of not using wood frames so they are a lot lighter weight for hanging on my ceiling.
The most valuable DIY acoustic panels vid I have found. I am not using the frames for sure. Too much hassle 😌
You're a Godsend brother...this is exactly what I'm going to do. I appreciate you.
Glad I could help
You make good points. I was impressed that you were not steered by opinion and bias towards mineral wool for sound absorbing panels (where fireproofing and soundproofing density it's not a strong factor), but use the NRC rating for sound absorbing quality. I liked your idea of keeping things simple, for a garage or working shop area, where bumps and rigidity for moving around isn't needed.
Really good video. I'm building a large garage, 30' x 40', with 10' walls. We used a scissor truss to give us a vaulted ceiling. The walls and ceiling are plastered. You would not believe the echo. I'm going to have to do something to address it. This looks like an excellent solution.
Excellent video - you did all the research and work - layed it out brilliantly. Super appreciate you/this video! Thank you SO MUCH!!!
Glad it was helpful!
Wow, thank you. This is exactly what I'm looking to do. My kids are starting up a garage band in our garage and I need some simple diy sound panels that I can make myself without tools, so this is awesome. You explained everything so well, thank you!
Hands down, best video in this category! I will be using these materials and techniques in my upcoming project. THANK YOU
GREAT! Thanks so much. I finished my (rockwool) traps , now moving to panels. You just convinced me to skip the frames & go with rigid boards. Much easier.
I really appreciate you putting this video together. Super helpful.
Brilliant!. Could I used these as Bass Traps by mounting them in a corner at a diagonal leaving the air space behind? Thank you.
Going with the 703, but have an idea to fix the imperfections or at least hide them...frame the panels with Cardboard.
Salute to you Walt, I've done overly extensive research on and off for the last few years, never quite finding a perfect/cheap DIY solution...until watching this video. You answered every question I had before i got a chance to google it. Thank you Thank you Thank you
Thanks . For sure the best and most cost effective method .
Great content man. My 2cents from experience: the frameless coating works. Yes u gonna need more than suggested. Also 705 dont come in 4 in thick from most sellsers...i coulbe wrong but its hard to find. . Also u sprayed the whole panel with adhesive. 😂. Spay just the sides with adhesive.
I see 705 in 4 inch in stock online, plenty of it
@@stevesells9545 where? What's the website?
@@stevesells9545 where? definitly would love a link!
Awesome job, I dig the fabric wrap and custom designs.
Amazing...never thought simply covering a panel like this!
This is an excellent video, i am going to make a cheaper version right now as each panel currently is looking at 25$ for just the OC 705 but this is a phenomenal idea
What measurements did you use for the fabric on those panels? I was confused when you were saying by the yard, is that the width?
Cool video if you don't mind my suggestion but when your working with spray glue you must let it tack up prior to adhering it for future reference and for others let it sit for a few min and then put it on it will last much much longer appreciate your time making the video great ideer frameless
An excellent informative video. All the info anyone would need so subscribed & will using for my panels. 💯
I am wondering if the spray glue on the front might impact the sound absorption.
Probably a miniscule amount.
You don’t need to spray the front. Just pull it tight and glue it to itself along the sides and back edges
Agree with others this is the best video on this topic. Where can I find information on the impact of distance from wall or ceiling? I need to place panels on a ceiling to reduce standing waves, but space is limited.
Great video! The black fabric you put on the back, is that acoustically transparent too? One huge thing (you may have mentioned) is when you put these away from the wall/ceiling surface you can get twice the absorption as the sound passes through twice (provided that black fabric is breathable)
Was also thinking about this.. maskes sense. very good !
Hey Walt, thanks for an awesome video! I'm thinking of making some for my new place but I have one fear: Do the panels "leak" any glassfiber/stonewool through the fabric over time?
Amazing. Absolutely awesome. Thanks to you, I just purchased two packs of 705 from acoustimac! I can't thank you enough. I have one question, what size print did you buy from Big Wall Decor? The fabric you got from them fit your panel perfectly.
Same question. Was just on their site and it looks like the sizes don’t align exactly.
Approximately how much does each panel weigh? Do you think they would stay up using a few of those 3M plastic velcro type tabs to avoid the need to put holes in the wall? Thanks! Great video!
Thanks bud , very helpful and well done.
No problem 👍
Great video but really tough to find this stuff in western Canada.
Been thinking of DIY acoustic panels, and wondered why there couldn’t be a solution without a frame. Not that I couldn’t make one, but why would I mess with it if I don’t have to? Thank you!
Great video! How far does a can of 77 on average?
Hello Walt Could you test out how to Reduce the DB levels on a mitre Saw one Source besides the motor is the Blade which is like a Cymbal from a Drumkit which rings every time you lift the Blade after cutting your cut.
Excellent vid full of useful info. The best I have come across. Thank You!
new sub here!
I saw you had a OC 703 4" panel in there at 18:06. Is that also frameless? Can it be hung to the ceiling?
Please clarify a mistake made around the 12:12 time of the video comparing the edges of two different panels, when you call them both OC705. Did you mean to say the panel on the left is OC705 without edge coating and the panel on the right is OC703 with edge coating?
Thanks for pointing that out. Yes the softer one was the 703 with edge coating on it, and the firmer one was the 705 without edge coating.
Thank you, was just going to ask for clarification on this!
And thank you @Waltsreviews for the correction; I noticed there were a couple of other slip ups that you didn't correct too. Just a friendly suggestion to listen critically before final uploading. Cheers and thank you for the weekend project!
No1 hidden factor is safety. Rockwool is fibrous & you defo don't want loose fibres floating in the air to breathe in.
Isn't fiberglass also fibrous? Wouldn't it have the exact same issue?
This is a really helpful video! I have textiles from all over. Is it possible to use hand woven cotton textiles, for example, something like bogolan mud cloth from Mali or Kente cloth from Ghana?
Can you send the link to solid gray fabric and for the black on the back you used to make it, please ?
Holy hell where do they have awesome garages like this? Those on exist in multimillion dollar homes where I live.
You mentioned puncturing with spikes for hanging. Are you puncturing all the way into the slab and is it sufficient to hold the panel from falling from the ceiling? Thanks
Good information.
Thanks
A note for anyone making this in the future (Especially if you arent in USA) once you factor in price of Impaler clips, Cloud anchors, a few cans of Spray adhesive and the Fibreglass paint this isnt cheaper than going the wood panel route
Beyond Excellent 😊
The 703 / 705 edges are always damaged so this works if you're ok with janky edges that aren't clean
How is the smell? I have noisy apartment neighbors and want to make some for my bedroom. Does this method result in a panel with a strong "chemical" smell?
Sooo... how safe is this, though? Fibreglass is nasty stuff. I can see a ton of yellow fibres that are stuck to the outside of the weed barrier at 12:45. You don't want those loose fibres in your space. Also, since the boards are very stiff, doesn't this cause some high-frequency reflections and reduce it's performance as a good studio panel? Looking at the NRC, over 2k has a big drop in performance.
I've seen people using recycled cotton (jeans) as a high-density filler that offers the same properties as fibreglass. It's more expensive, but it also comes in quite rigid boards. I imagine you could glue some thick card to the corners and achieve a similar build with no hazardous materials and no need to paint it.
Great tips!
Thanks for the video. I want to make a frameless acoustic panel like yours but I'm thinking of sewing the fabric onto the fiberglass, rather than glueing it with adhesive spray. I know it will be a lot of work with the needle and the thread, but wouldn't it be better that way? Because glueing all sides of the fiberglass would make it stiffer and maybe reduce its absorbing quality... What do you think??
I don't think stiffness effects the acoustic properties. I say that because fiberglass boards and way stiffer than mineral wool but comparable in noise absorption. So not sure if the extra time is worth it for functionality, but if you prefer the look or method, its not a bad idea.
GREAT video! I will be building panels this weekend based on this video. Question - I would like 4" panels for better low frequency treatment. Can I sandwich two Owen's Corning 705 2'x4'x2" panels or would I be better off with Owens Corning 703 4" panels? I am unable to find 705 panels 4" wide, but I'm thinking the 705 panels being more dense would be better than a 4" 703 panel?
Hey what did you end up going with and how'd it work out?
I posted what I did in another comment a few days later. I did build 4” panels. They seem to work well but I don’t have a way to validate with data.
Did you compare this to using a 3" EPS insulation board? Also rigid and fairly inexpensive...
Thinking of building a wall above a wall lots of notching maybe tape maybe paint after? foil backed might look ok Easier than fabric
Can you paraphrase? I think you doubled up some words.
The cheapest and best at absorbing sound are folded towls in a simple timber frame.
Where do you get the wall mount brackets?
That´s great. Let me as you something. It´s a good idea to put it in the ceiling to reduce echo? =)
What's the Black backing on those Owens Corning panels?? Is that material allow sound through it
Weed barrier fabric
So no need for the edge coating on the 705?
About how many spray cans of adhesive did you need?
is the fiberglass board more rigid than the rockwool board?
Does the glue decrease the acoustic performance at all?
That's a good question. I have a hunch that it does affect it.
Thanks for the video. Will it help insulate your house too?
a little bit, but not much IMO
The cost of these has more than doubled since this great video was made. Amazon has the 703 at $125 for 12 one inch with free shipping. Considering gluing two together making it two inches thick. Any thoughts on this?
It would work just as well as single 2” thick pieces. And if you’re thinking of using frames you wouldn’t need to bother gluing it.
is this same with rockwool ?
How many cans of 77 for say...5 panels do ya think?
Opens with "save money while being lazy"
I'm in.
I'm building a frame type because and I've come to find out you can usually ask the lumber department in your local lows-type store if they have any scraps for sale on discount...
Step zero: material acquisition XD
They stopped doin that I was just there
Is it safe to install these panels in a bedroom? I noticed that you were wearing a mask when handling the fiberglass panels. Does the fabric do a good job at containing the fibers?
We didn't notice much fiberglass getting kicked up. Masks were largely worn because we were using spray adhesive. It's still probably a good idea to wear a mask when dealing with fiberglass panels, but you should be safe once they have fabric wrapped around them.
I like this video
🔥🔥🔥
Couldn't you just mix black dye with alcohol and spray it! The glue for wrapping it will block the absorption to some degree
Is this Viggo Mortensen's son or brother ? 😀
Its been my experience that you are going to have to use at least2 coats of M77
Nicee
The info is great. Oddly, the sound quality in the video isn’t great. Still tinny.
Do your health a favor and don't use unsealed fibre glass in your living room. You can also achieve great results with natural dampening materials like hamp or coconut.
No way rockwool or fibreglass are the top choice..the cheapest and have highest nrr is the humble EPE or polyester fiber
Theres alot of bullshit out there. This isnt that. Thanks for the video. Guys even building your own plan on spending around 1k to get any results in a big room plan on spending 2k.
Sound management is expensive..if u have a 3k system. You can pretty much plan on spending close to that to get the room right. If you dont....you might as well have a 300$ bluetooth speaker crank it up and call it a day...
......! if your trying to build cheap panels they dont exist. !
Youll waste your money with skimpy foam shit..
You wanna learn acoustics. Soundproof the laundry room door. Youll have a hundred in it before you realize your not doing shit...hell it costs about a 100 just to isolate the washer and dryer from the floor.
In a 2 channel hifi or theator room (mines 19x40x9) with a 7x10 knook in the middle of one of thelong wall. Room acoustics are pretty good with the furnishings and no treatment. Im blessed with a good basement mancave. And im looking at spending $2500 total .....to safe and sound the open joists for 350 square feet. And just use insulation the rest of the way. Then another 150 or so square feet of panels for the walls. Good heavy Rugs for the concrete floor (2 big ones for front wall and two little for rear wall bass traps.)
And thats not really paying any attn to looks. Just wrapping pannels in generic thin cloth.
Cheapest way thatcwould almost be free. Get all your old coats and clothes. hang clothes rods and hang all your clothes along the walls. 2 for one deal. Then u free up your closet for a grow-op. Lol
That room has a lot of echo LoL
It’s not meant to be acoustically treated. It’s a shop
Ikea finnsby + rockwool sonorock eco + fabric = bargain broadband absorber
This stuff is prohibitively expensive.