I run with this final stage a Magnat Edition BS 30 300mm (800W) subwoofer box and must say I am more than satisfied. The output stage is a bit warm, but never too hot at higher loads. Very good, I find the many options that you can make directly to the final stage anddepending from radio. I would buy it again, because this amp is worth the money in any case. The amplifier is screwed to the subwoofer box. Unlike many warnings that the amplifier is broken by the vibration, happened yet does nothing for me. Can I therefore put each on a budget warmly recommend.