Ever hear of stacking subwoofers?

I have tried this exact scenario (among many others) you describe with a pair of M&K 350THXs. It actually works quite well and basically doubles the output. However, I get smoother and more balanced sound with my two subs placed in each rear corner behind me. Although, I could go balls out like Steve and aquire two more units to then stack them. http://www.avsforum.com/ubb/wink.gif

Interesting. My room configuration would not permit me to try subs behind me (long story--long room).


Deniz, did you invert the second sub, as described?


What did you use for isolation between the two?


I assume volume, crossover, etc. were set identically?

I did invert the sub as you mentioned and the xover and gain was set by my processor to identical values.


For isolation I use 1/8" thick strips of Sorbathane in all four corners. I buy this in 12" x 12" sheets, and also use it to isolate the satalite portion of my towers from the bass section.


BTW, I also placed the sub in its normal position (upright) because of the driver config with its two 12s and didn't notice a difference.


[This message has been edited by Deniz Mutlu (edited July 01, 2000).]

I stack 3 THX Subs next to my Mits 65905


Heres some Pic's of the setup

http://community.webtv.net/truckforce/hometheater

Deniz,

Where do you purchase sorbothane sheets and what is the price?


Dave

I'm a Sorbathane dealer. I really don't remember what I paid for it but it is relatively inexpensive.

actually, stacking the subs is recommended by Boston Acoustics for their 595x subs... i have tried them in both separate locations and stacked and have to say that stacking provides a much tighter and more defined bass...

Stacking is a common practice in maximizing subwoofer output. This is because placing more than one sub in a room invites some very nasty interactions between subs. These interactions are avoided by placing the subs in the same location. Unless you have a real-time analyzer and the appropriate software, stacking subs is your best bet for maximizing performance. It is virtually impossible to properly place two subwoofers in a room using only a SPL meter and test disc (although you're welcome to try, I recommend a dolly and weight-lifting belt). However, don't think that stacking two subs will not give you twice as much output. You will normally only see a gain of about 3 dB or so.