I would like to preface this by explaining I get VERY nice base with my current setup. The only thing I wish to change is when I watch a movie I want to feel like I am in the middle of the explosion rather than the explosion being forward of me so my thought is to place a subwoofer on either side of the sofa.
I just had an interesting conversation with a Rythmik representative discussing my room and my desire to achieve a more fuller bass. I am contemplating purchasing a second T-9 and placing them both next to the sofa and maybe a R-528SE behind the television (where the T-9 is now) or possibly keeping the T-9 in its current location and looking into a pair of Rythmik D15SE's. http://www.rythmikaudio.com/D15SE.html
The Rythmik rep in SoCal made some profound statements I do not necessarily agree with such as:
using a high level connection is like double amplifying the sound since your tapping off from the speaker output, amplified and the sub has its own amplifier causing phase issues and distortion.
use the subwoofer output (LFE) from my Integra, allow Audyssey to set the crossover on the REL to approx 80 Hz and dont use the high level connection at all.
a front firing sub vs a down firing sub makes no difference other than cosmetics.
the REL T-9 may play to 30 Hz but at a low db level.
the Rythmik is pretty flat down to 14Hz.
a 3 db increase is like doubling the sub volume.
These are just a few comments I found controvercial. The way I understand is the high level connection is only using millivolts of power so ther is no "double amplification" going on. Further since your tapping off the speaker output terminals the subwoofer physicly must be in phase with the main speakers since they are both receiving the same signal. Also my Paradigm Signature S2's are rated down to 52 Hz so I set my REL's crossover to about 45 Hz and its very musical. Sounds awesome!
Am I off here, missinformed or did I talk to someone who knows more or less than I?
What I would like is to discuss in detail my room, set-up and what I'm attempting to achieve with no bias to any specific brand.
Below is a scale diagram of my room followed by photographs showing what the room accoustics are like. The numbers in the diagram are decible levels from the subwoofer in those locations with the microphone placed in my "sweet spot" in the middle of the sofa. The microphone stayed in the one location and I moved the subwoofer around the room.
05-25-2013 06;25;00PM.JPG 1045k .JPG file
007.JPG 260k .JPG file
008.JPG 258k .JPG file
011.JPG 257k .JPG file
012.JPG 258k .JPG file
013.JPG 261k .JPG file