Eden USM-WT550-U World Tour Bass Amplifier Head 300/500/750W RMS power at 8, 4, and 2 ohms 3dB of headroom Low-noise circuitry-12dB input pad Switchable automatic compression 5-way semi-parametric tone control, Mono pre and stereo post tone control effects loops Stereo aux inputs DI out with ground lift Headphone outTuner out Thermostatically controlled fan