I hooked my Peavey Minx 110 practice amp up to it using the FX loop, and an rca-to-1/16'' jack, and its amazing. The KLH sub is an active 150w; 10'' sub, and the minx is a 50-watt 10'' speaker. I can crank the highs and mids on my amp, and turn the lows down, and on the sub, tweak the frequency and gain to what ever i see fit. Its a GREAT way to get missing LOWS that you dont get from a practice amp. I recommend you try it!