Subwoofer Question

Keep in mind that the 60Hz crossover setting isn't a cliff.  There is some slope to that rolloff above 60Hz and those upper frequencies the sub is playing can be additive to the same frequencies the mains are playing.

I'd set the crossover on the sub lower to something like 40Hz and see how it goes first.

Just curious, what speakers are you pairing them with, how big is the room, what gear are you using and are you high pass filtering your mains? Some other info there could help to dial in your setup.

@paradisecom is right in that a xo point @60hz doesn't stop your sub from playing and adding @240hz. Albeit probably 20db down or so, it will still add to what the mains are doing. Combinebthat with the likelihood of a 200hz room mode and you have some extra weight in that region for sure. I'd be willing to bet if you measured on REW a L with sub vs R with sub, the side where the sub is placed will be 1-2db higher under 500hz. Try centering your sub between mains, and perhaps lower your xo point. Other option would be using dsp to hard 4th (or higher) order filter to build that xo point to be a cliff where Gandalf shouts "You Shall Not Pass". After you try that for a weekend, just buy a second sub. I upgraded my single Rythmik 12" sub to a pair of Rythmik F8, and I now have perfect stereo imaging  with very good separation with high pass filter around 150hz and raising spl measured down to 9hz in my small room. With bass notes, it's a strength in numbers thing. 

-Lloyd

Hi Loyd, Check out my virtual system. All the answers to your questions are there. Thank you! Im going to lower my crossover point. My speakers go down to 44Hz so I can go lower.

Two subs are always better than one!!!!   

Yeah given the space and how you have the speakers set up in that doorway so to speak, moving sub to dead center isn't really an option. Now, if you run your system with the sub off, everything is dead center perfect balance? Have you measured your system's response with the left + sub vs right + sub to see if perhaps it's a phase issue on one speaker causing a null at a certain frequency? I've seen that before where sub is perfectly set for one speaker, but absolutely detrimental to the other channel. It's maddening. I'm sure there's an acceptable setup option available. Also try pulling your sub away from the corner a pinch. If it is not only located on one side, but is corner loading that side, it'll be exasperating those heightened frequencies. But worst case scenario there's always another REL t7 on sale somewhere....... lol.