Customer returned and claimed not fully functional, but this has not been tested or confirmed. Still in very good cosmetic condition. One gain switch on the back panel is visibly broken. Includes only the amplifier; no accessories are included.Sold as is for parts or repair; all sales are final ............................... DescriptionBring audio inputs to perfect volume levels with this Arcam four-channel power amplifier. Four channels can be handled at once, powering audio equipment at up to 270W. Use stereo, dual mono and bridged modes for greater control of drive output on each channel. This Arcam four-channel power amplifier features an acoustically damped chassis for reducing low-frequency interference during use.Features500W total powerRMS rating of 125W x 4 at 4 ohms or 90W x 4 at 8 ohms, 20-20,000Hz, 0.2% THD; 4 channels driven for robust audio.Up to 8 ohms of speakers impedanceEfficiently conducts power.112dB signal-to-noise ratioReproduces music with all its original authority and detail.Class-G designCombines efficiency with fidelity for high-powered operation.Network connectionCan be easily controlled and monitored remotely. General SpecProduct NameFMJ 500W 4.0-Ch. Power AmplifierBrandArcamModel NumberP429SeriesFMJColorBlackColor CategoryBlackAudioContinuous Watts x Channel @ Ohms90W x 4 x 8 ohms; 125W x 4 x 4 ohms; 180W x 1 x 4 ohms; 110W x 1 x 8 ohmsTotal Power Handling500 wattsNumber of Channels4Total Harmonic Distortion0.002 percentMinimum Frequency Response20 hertzMaximum Frequency Response20 kilohertzSignal-to-Noise Ratio (SNR)112 decibelsFeatureBridgeableYesConnectivitySpeaker-Level InputsYesInputInput(s)Ethernet, Pre-amp, RS 232, Speaker, USBOutputPreamp OutputsYesDimensionProduct Height4.13 inchesProduct Width17 inchesProduct Depth16.7 inchesProduct Weight31.7 pounds