I bought this amp used for some backyard speakers, but ended up building myself a portable speaker instead, so barely using it. I have noted a scratchy knob or 2, but nothing was cutting out, and I had no issues with it. 325w, 6 inputs Mixer/Amp The MP6D six channel powered mixer solves problems! 325 Watts at 4 Ohms means that you get better than 160 Watts of power to each of your 8-ohm speakers. This means more power where you need it! The 32-preset switchable digital effects processor has more than just basic reverb. Effects include seven rooms, seven halls, six chambers and plates, seven delays and five special effects!! Pick the effects that works best for you http://www.yorkville.com/legacy/powered_mixers/product/mp6d/