ART Pro Audio HeadAMP 4 Pro - Five Channel Headphone Amplifier with Talkback - Manual (Page 19)

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SPECIFICATIONS:
Input Connections: ........................................................................................1/4" stereo TRS (except Main Right input
which is TS only)
Input Impedance: 1/4" ....................................................................................>10K Ohms
XLR input........................................................................................................2K Ohm
Maximum Input Level: 1/4".............................................................................+18 dBu
Maximum external mic input .......................................................................... +2dBu (balanced)
Output Connections: .....................................................................................1/4" stereo
Output Impedance: ........................................................................................47 Ohms
Max Output Level: ..........................................................................................+15dBu unloaded, 100mW/channel @ 30 to
100 Ohm load
Frequency Response: ....................................................................................10 Hz – 60 kHz +1 dB
Maximum Gain line in to any output: .............................................................+13 dB
Maximum external mic gain ...........................................................................+58dB
THD: ...............................................................................................................<.02% @ 20-20kHz, <0.005% @ 1k Hz
Equivalent Input Noise: ..................................................................................-100 dBu typical (“A” wtd., gain @ max)
Phantom Power: .............................................................................................+48Volts DC, filtered, current limited
Chassis Type: ................................................................................................All aluminum black anodized with integral
rubber sides
Power Requirements: ....................................................................................9VAC @ 1000mA (external)
Dimensions: ...................................................................................................1.75”H x 5.9”W x 6.5”D (44.5mm x 150mm x
165mm)
Weight: ...........................................................................................................2.9 lbs. (1.32 kg) with power supply and
packaging
Note: 0 dBu = 0.775Vrms