Mackie HM-800 Rack-Mountable, 8-Channel Headphone Amplifier
The Mackie HM-800 is a rack-mountable, 8-channel headphone amplifier designed to provide versatile headphone amplification for artists, musicians, and engineers monitoring through headphones in live stage applications and home, project, commercial, and mobile-recording studios. It features two stereo main outputs via four 1/4" jacks and sixteen 1/4" TRS stereo headphone outputs—two per channel—fed by a customizable blend of inputs.
Two stereo main inputs via four 1/4" jacks can be combined with a per-channel 1/4" stereo aux input. Each channel offers stereo/mono mode switching, input selection, and output level adjustments. 7-segment LED meters display main input and per-channel output levels.
The HM-800 ships with an IEC power cable and occupies 1 RU in a standard 19" rack.
Features:
Distribute signal to up to sixteen pairs of headphones
Occupies 1 RU
Two stereo main inputs via four 1/4" jacks
One 1/4" stereo aux input per channel
Two stereo main outputs via four 1/4" jacks
Two 1/4" stereo headphone outputs—one on the front panel and one on the rear—per channel fed by an output level control
Switches on each channel for stereo/mono operation input selection
7-segment LED metering for main input and each output channel
Heavy-gauge steel chassis for rugged durability
Specifications:
Number of Channels: 8
Input Connections: 4 x 1/4" TRS balanced (two stereo pairs, also accepts 1/4" TS unbalanced)
8 x 1/4" TRS stereo unbalanced for aux inputs
Output Connectors: 4 x 1/4" TRS balanced (two stereo pairs, also accepts 1/4" TS unbalanced)
16 x 1/4" TRS stereo unbalanced headphone outputs
Maximum Input Level: Main Input: +19 dBu
Aux Input: +20 dBu
Maximum Output Level: Headphone Outputs: 550 mW per channel at 47 Ohms (+21 dBu)
Input Impedance: Main Input: 40 kOhms balanced, 20 kOhms unbalanced
Aux Input: 13 kOhms unbalanced
Output Impedance: Headphone Outputs: 3 Ohms unbalanced
Gain Range: Main Input: -67 to +19 dBu
Function Controls: Power on/off
Main level knobs
In 1/2 switches per channel
Stereo/Mono switches per channel
Output knob per channel
Frequency Response: 20 Hz to 20 kHz (±1 dB)
THD: <0.005% (+4 dBu, 1 kHz, unity gain)
Noise: -70 dB
CMRR: Main Input: >52 dB at 1 kHz
Display: 1 x input level meter
8 x output level meters
Power Requirement: 100 to 120 VAC, 50/60 Hz, 24 W
220 to 240 VAC, 50/60 Hz, 24 W
Power Connector: 1 x 3-pin IEC male, 250 VAC, 10 A
Construction Material: Heavy-gauge steel chassis
Dimensions (H x W x D): 1.8 x 19.0 x 8.8"
Weight: 8 lb
