GIK Vicoustic and others

@ei001h

Double drywall does work (Quiet rock is the bomb, Home Depot) I did that and used green glue between the layers. I also had spray foam installed and then rock wool on top of that on all walls and ceiling before drywall. Prior to drywall going up it was eerily so quiet that it was actually disturbing because of no reflections at all.

If you’re going to do it might as well do it right. BTW I have more than a case of Green Glue left over if your interested.

Regards,

barts

@barts 

why double dry wall if you’re already using rock wool ? Where did you instal spray foam ? Why is glue important?

@ei001h 

I just finished my basement room a few weeks ago. I was in the same situation as you with not knowing the best way to build the room but wanted to do it right to achieve the best sound I could. I ended up going with an acoustician to design the room for me and I built it. His price was VERY reasonable. I recommend consulting a professional to at least get their thoughts. Jeff at hdacoustics is great to work with   He I’d very thorough and knowledgeable. Good luck! 
 

Ron

I'm in the middle of  a project treating a room exactly the same size as yours.

I went DIY for a couple of reasons.  Delayed shipping from vendors, mostly.  There's a lot of info on YouTube regarding treating mastering rooms/studios.  All the same applies to 2-channel.

Basically, use as much broad-band absoption in the room as you can reasonably fit.  Maybe diffusion on the front wall between the speakers.

Place your speakers on the short wall (short wall is front and back, long wall on the sides).

Do the bass traps first.  Front corners, wall to ceiling.

I purchased Owens Corning 703 and 705 directly from an insulation company.  Arrived in two days.

Stuff the ceiling joists.  I used 9" R-30.  Took about $250 to do the ceiling.  I covered the ceiling with natural cotton canvas (painters drop cloth).

For cloth, I can't recommend Guileford of Maine enough.  It's expensive, but it does not wrinkle (no ironing...).  Has a great hand and is easy to work with.

Do your own research and plan well.  Lots of info out there.  You can spend $10k easily in that room if you follow someone like Denis Foley (Acoustic Fields).  I checked them out.  I'm sure the pro stuff works, but I'm a low-budget guy.  My system is only worth $10k or so, I can't afford to double it for room treatments.

Hello,

Years ago I was in the same boat. I researched insulation for audio with rock wool. Try to leave a 2” gap between the Rockwool and the space above it. It is better than stuffing the whole space with the insulation. Please call the companies about a referral of what to get. As said above try not to have skyline defuse panels behind you if you are close. It sounds really weird. First reflection points first. You can try this out with a small blanket or towel pined on the wall. I love the idea of the bass traps but you are very limited do to room size. In most cases you are going to have the speakers on a short wall so you can get some space in the front and back. Otherwise you will be dealing with slap back from the rear wall. Since you are doing this from scratch I know their are ways to do some of this by actually using the wall and ceiling cavity. I know plywood is so expensive but I am thinking of doing a plywood room/ drilling holes and maybe using some carbon fill. Great for bass control. Then, worry about reflection points. I want to do the carbon fill in my room since I have a 12” raised platform for stadium seating. Just to let you know. After you get the room done you can control the rest with power cables. I would call Straightwire and get their recommendations for cables. One your room and gear is in. Anything you need to tweak or correct the sound they can help. Most people would be surprised by how good even their affordable lines cost. If you are doing subs please stick to sealed box with good brands like JL Audio, Rel, and a few others that are more specialized but are designed for two channel. I hope this and one of these acoustic companies can make your room great.