Ultra-Compact 4-Channel Stereo Headphone Amplifier. The AMP800 features 4 totally independent stereo high-power amplifier sections, each with dual outputs. You can use the Phones Level control plus the accurate 6-digit LED output meter per channel for easy level monitoring. There are 2 balanced Stereo Main Inputs with independent Level and Balance controls for individual mixes, selectable for all 4 of the headphone amplifiers. If you need to accommodate more than 8 listeners, the convenient Link Out A enables cascading additional AMP800s.Package Contents: AdapterTHD: < 0.007%DA Conversion: NoBluetooth: NoNumber of Channels: 4Inputs: Jack 6,3 mm TRSDisplay: NoPower Supply: AdapterFrequency Range: 10 Hz - 20 kHzHeight (cm): 4.8Type: Headphone AmpOutputs: Jack 6,3 mm TRSWidth (cm): 24.2Depth (cm): 12.0USB: NoSensitivity (dB): 108.0Headphone Output: YesColour: Silver