HM400

Form Factor: Rackmount
Number of Headphone Channels : 4-Channel
Headphone Output Power: 550 mW per Side into 47 Ohms (Max)
EQ : 2-Band EQ per Channel
Display : 5 x Multi-Segment LED Meter

Connectivity
Analog Audio:
I/O 2 x XLR 3-Pin Balanced Input (1 Stereo Pair)
2 x 1/4" TRS Balanced/Unbalanced Input (1 Stereo Pair)
1 x 1/4" TRS Unbalanced Stereo Input
4 x 1/4" TRS Unbalanced Stereo Aux Input
2 x XLR 3-Pin Balanced Output (1 Stereo Pair)
2 x 1/4" TRS Balanced Output (1 Stereo Pair)
12 x 1/4" TRS Unbalanced Headphone Output

Performance
Frequency Response : 20 Hz to 20 kHz ±1 dB
Gain/Trim Range:
Inputs: -66 to +18 dBu
Max Input Level: Line Inputs +15 dBu / Aux Inputs +20 dBu
Max Output Level : Headphone Outputs +21 dBu
Impedance : Headphone Outputs 3 Ohms (Unbalanced) / Inputs 20 Kilohms (Balanced) 10 Kilohms (Unbalanced) / Aux Inputs 10 Kilohms (Unbalanced)
THD: < 0.01% (at +4 dBu, 1 kHz, Unity Gain)
Noise: -66 dB
CMRR: Line Inputs > 42 dB (1 kHz)

Power
Power Requirements : AC Input
AC Input Power: 100 to 120 VAC, 50 / 60 Hz and 220 to 240 VAC, 50 / 60 Hz
Power Consumption : 24 W

Physical
Rackmount Size: 1 RU
Dimensions : 19 x 8.8 x 1.8" / 483 x 224 x 46 mm
Weight: 8.0 lb / 3.6 kg