Well, I bought a remanufactured one from Cadence off e-bay for $38 shipped. It's supposed to just be a temporary amp for my 12" Boston G5 until I have the extra money to get a better amp. The amp looks absolutely unblemished, I couldn't believe it was refurbished. The rms is rated at 500 at 2 ohm and my sub is rated at 450 rms. the amp pushes the sub to it's absolute limits without clipping. I used an o-scope to check it. I think it's a great amp, especially for the price.