Topp Pro THA-4 4 channels Headphone Amplifier

Model	THA-4 4 CHANNEL HEADPHONE AMPLIFIER
Audio Input	Connectors: XLR and 1/4" jack Type: HF filtered, servo balanced input Impedance: 50 kOhms balanced, 25 kOhms unbalanced Max.input level: +21 dBu balanced and unbalanced(unity gain)
AUX IN andDIRECT IN input	Connectors: 1/4" TRS (tip=left, ring=right, sleeve=ground) Type: Unbalanced Impedance: 25 kOhms Unbalanced Max. gain (CH GAIN & INPUT GAIN): +6 dBu Max input level: +21 dBu unbalanced(unity gain)
Audio Output	Connectors: XLR and 1/4" Jack Max. output level: +21 dBu Balanced and Unbalanced
SystemSpecifications	Frequency response: 10 Hz to 20 kHz,+/-2 dB SNR: >90 dB, Unweighted, 22 Hz to 22 kHz THD: =0.01% typ.@0 dBu, 1kHz
Headphone Out	Max.out: +21 dBm Min.output impedance: 100 Ohms Max voltage gain: +12dB(MAIN IN:0dBu, input & output gain max) Noise(bus noise): =-76dB@1KHz (CH GAIN & MAIN GAIN at max, other at min, SW at up)
Function Controls	Input level: Main input level Output level per CH: Output level per CH Balanced: L/R Mode: Switches channel to mono
Indicators	Input level: 8-digit LED display:-12/-6/0/+6/+12/+18dBu(clip) Output level: 4-digit LED display: -24/0/+12/+18dBu(clip)
Power Supply	AC input: AC 18V/1000mA
PHYSICAL	Dimensions: (WxDxH) 483mmx197mmx44mm Net weight: 1.9kg