I have a Behringer 1400 (mono-bridged) running to an Ampeg 4X10, with an Ampeg SVP-CL Pre-amp. I found that when running my pre-amp at about 65-70%, I was getting a bit of fuzziness, but never any clipping. I attached a Fender 15" woofer to it, and now both cabinets pound the **** out of everything.