Listening Room Dimensions... I'm building one and need your help


Sounds simple but I'm having a hard time coming up with most 'ideal' dimensions for this dual -purpose room that I'm building this year (hopefully).  



Purpose #1:
listening room for 2-ch hi-fi 
I have BIG speakers- several pairs 
*ideal is approx 25'x40'x12'
*want to sit 6-10 people in prime listening area 

Purpose #2: (other side of the room)
band rehearsal area (loud guitars, drums, keys, PA system, lots of 
*ideal is...bigger the better 

- I've read really good threads about general guidelines especially from Doctor Fine- hope he jumps in...
- I know the Cardas, and other rule ratios. But this room is a combination room so I'm not sure how much that changes anything 
- I know I'll probably have to use quite a bit of sound treatment 


My first inclination before research was 30' x 50' x 11'. 

What dimensions would you recommend and why??



ramoneo14

Showing 1 response by cbrents73

The ratios still apply regardless of how big you want to make the space.  Since this isn’t going to be dedicated, which you’re alluding to it being multipurpose, work the ratios the best you can based on what you want to do with it.  Most people who strive for a “great sounding room” rarely get it. They end up over-damped and dead sounding or there’s not enough damping and things are too reflective with more modern hard surfaces.  Odd walls and dimensions can help break things up and with furniture, rugs, carpet, wall hangings, there’s a lot that can help.  This is an area that can easily be overthought.  
https://www.stereophile.com/content/listening-room-forgotten-factor-page-2

https://audiophilereview.com/room-acoustics/ideal-room-size-dimensions-and-ratios-for-audiophile-listening.html

https://www.psaudio.com/pauls-posts/critical-room-dimensions/