Compact 4-channel stereo headphone amplifierCan be used for up to four headphones at the time thomann . for simultaneous listening of main mix with separate volume control.Comes with four stereo amplifiers deliver outstanding performance at any volume. Clear sound with ultra low-noise 4580 operational amplifiers are used in 19inch studio equipment.Separate volume control for each channel1 Input with 6.3 thomann mm stereo Input impedance 100 Ohm4 outputs with 6.3 mm stereo jakcsOutput impedance 80 OhmDimensions (W x H x D): 103 x 46.5 x 57.2 mmPlug Type:EU Plug,it applies to Indonesia, Germany, , Spain, and so onVoltage:DC12VType: HA400 Headphone Amplifiercolor:BlackMaterial:Metalsize:103 x 46.5 x 57.2 mmPackage Contents:1 x Headphone Amplifier1 x AdapterOnly the above package content, other products are not included.Note: Light reflection and different displays may the color of the item in the a little different from the real thing. The measurement allowed error is +/- 1-3cm.