Mackie HM-800 Rack-Mountable, 8-Channel Headphone Amplifier

8-Channel Rackmount 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" / 46 x 483 x 224 mm
• Weight: 8 lb / 3.6 kg