Mackie HM-800, 8-Channel Headphone Amplifier

Descriptions Mackie HM-800, 8-Channel Headphone Amplifier The Mackie HM-800 features a rack-mountable with 8-channel headphone amplifier which is designed to provide a versatile headphone amplification for artists, musicians and engineers monitoring through headphones in live stage applications and home, project, commercial and mobile-recording studios. The Mackie HM-800 also 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. The Mackie HM-800 has two stereo main inputs via four 1/4" jacks that can be combined with per-channel 1/4" stereo aux input. Each of the Mackie HM-800 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 Mackie HM-800 ships with an IEC power cable and occupies 1 RU in a standard 19" rack. Mackie HM-800 Main 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