Just purchased the 12" Dayton sub from Parts Express, but even with the gain turned all the way up, it is still 4-5 db lower than all my other speakers. I read here that most of you have the gain set at 11:00 or so. If I set mine at 11:00 I get virtually nothing on my spl meter(~-10db), with the gain turned all the way up I get (~-6db) while my other speakers are close to 0db. I am testing with the thx setup portion of the Incredibles DVD, it is the only thing I have that will give me a sub signal. I have the following setup. 1 Dayton 12" sub 2 Norman Lab 11's front 1 Klipsch KSC-C1 center 2 Klipsch RS-3 surrounds Yamaha RX-V620 Subwoofer output from the receiver is connected to the red input on the sub. All SWFR and LFE settings on the receiver are set to 0db. All speakers are set to small, which on this receiver gives a cutoff frequency of 90Hz.