Tweaks when building a listening room?

If you need isolation of the sound from adjoining rooms, I suggest you read the information on the Green Glue web site.

http://www.greengluecompany.com/

Their testing indicates that two layers of drywall are essentially no better than one when trying to reduce sound transmission through a wall. The articles on this site are very informative.

A drywall surface on studs resonates with acoustic energy just like a drum head. You need something to damp that resonance, or the whole wall vibrates and transfers sound into the adjacent room. Adding another layer of drywall adds mass, which lowers the resonant frequency, but doesn't lower the sound transmission much. According to Green Glue, adding this product between the two layers of drywall provides the needed damping and the test results show a dramatic improvment. I tried this on the ceiling of my dedicated room and it worked extremenly well.

My experience with building to Fibonacci (Golden Mean)ratios is very similar to Sarcher above. I ended up at 8ft H x 13ft W x 21ft L. The room response is remarkable.

Now is the time to consider the AC dedicated circuits and conditioning as well. Consider a dedicated circuit to each component and a large iso transformer on a subpanel just outside the room.

See details in my system.