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.
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" / 46 x 483 x 224 mm
Weight 8 lb / 3.6 kg
Packaging Info
Package Weight 10.7 lb
Box Dimensions (LxWxH) 20.8 x 10.7 x 4.1"