I have 2 amp setups: My 'old faithful' is a SWR Bass 350 old style red and black fascia. My rack consists of a Tech21 PSA-1, MAM parametric EQ, ART Dual Levellar and SOundtech 800W Digital power amp. I use 2 SWR Triads Now, I took the SWR to rehearsals after replacing the fan and was blown away by how much louder it is than the Soundtech. I usually run both channels of the soundtech at nearly full - the clipping LEDs always on, yet the SWR was only at halfway with the Gain just past 12 o'clock. I can;t work why it's so much more powerful. I've tried bypassing the compressor and EQ and going preamp to power amp. Even when the clipping LEDs showing up, it's powerful as anything, but never that Loud!