Hi there thanks for taking the time to read this...
My theatre is (4) Cerwin Vega MX-400 towers (each is a siren, midrange 4.75", and a 15" subwoofer). They are connected to my Yamaha Rx-V667 and I used the preouts, preamping them with two seperate Crown XLS amps.
Here is my problem, I think. They are different, and have slightly different output. The Vegas are 400rms, it was difficult for me to find amps exactly on 400 at 4ohms with 2 channels. One is the XLS1000 (350X2 @ 4ohm). The other is the XLS402 (450X2 @ 4ohm).
I have many questions and theorys, but my problem is basically that I dont get enough bass response, especially from the two plugged into the xls1000. There are many varaibles in this, from the fact that my 402 uses rca/XLR whereas my xls uses rca/rca.
My Receiver has "large" as an option for the front speakers only. The manual says it diverts the rest of the bass from the other speakers to the large. But, I want all four of my towers to bump, I have friends with smaller subs in and out of towers that arent getting nearly as much power, and are booming.
Ill post pictures if anyone wants to see.
IMPORTANT: My room is VERY small for these speakers. They are vertically stacked on either side of my tv. inB4 "thats not proper positioning... cancelling... or anything else. I know."