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.
Mackie HM-800 Specs
| 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 | |
| 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 |
| Package Weight | 10.7 lb |
| Box Dimensions (LxWxH) | 20.8 x 10.7 x 4.1" |