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SPECIFICATION:
Performance
Maximum XLR input level +34dBu (inc pad)
Maximum XLR output level +26dBu
Internal headroom Channels +20dB, Mix +22dB
Master meters 12 segment -30 to +16dB, 0VU= +4dBu XLR
Channel meters 4 segment -12,0,+6+16dB (5dB before clip)
Frequency response 20Hz to 50kHz +0/-1dB
Mic CMRR at 1kHz > 80dB typical
THD+n at +14dBu 1kHz Mic to mix out < 0.003%
Crosstalk at 1kHz Fader shutoff >90dB
Mute shutoff >88dB
Inter channel >90dB
Noise, rms 22Hz to 22kHz Mic EIN -128dB
Residual output noise < -96dBu (-100dB S/N)
Mix noise 24 channels < -80dBu (-84dB S/N)
Channel HPF Switched 100Hz, 12dB/octave
Output HPF Swept off to 400Hz, 12dB/octave
Channel EQ HF Shelving +/-15dB, 12kHz
HM Peak/dip +/-15dB, 500Hz to 15kHz, Q=1.8
LM Peak/dip +/-15dB, 35Hz to 1kHz, Q=1.8
LF Shelving +/-15dB, 80Hz
Mix 1-8 EQ HM Peak/dip +/-15dB, 500Hz to 12kHz, Q=1.6
LM Peak/dip +/-15dB, 80Hz to 2kHz, Q=1.6
Power supply External RPS11 IEC input
External Input for optional RPS11 backup supply
Connections
Channel XLR balanced pin 2 hot Sensitivity -60 to +14dBu
Total gain range 74dB
20dB Pad out 2k ohm, in >10k ohm
Wedge Ext in XLR balanced pin 2 hot >10k ohm, 0dBu, +20dBu max
IEM Ext in TRS unbalanced >10k ohm, 0dBu, +20dBu max
Talkback mic XLR balanced pin 2 hot Sensitivity -50 to -10dBu
Phantom power Internal jumper +48V (fitted)
Inserts Channel TRS, tip send, ring return, 0dBu
Output TRS, tip send, ring return, -2dBu
Mix 1-16 out XLR balanced pin 2 hot <75 ohm, +4dBu, +26dBu max
IEM/Wedge out XLR balanced pin 2 hot <75 ohm, +4dBu, +26dBu max
Talkback/Osc out XLR balanced pin 2 hot <75 ohm, +4dBu, =26dBu max
Headphones TRS, tip L, ring R, 30 to 600 ohm headphones recommended
Lamp 4-pin XLR max 12V 5W lamp
ALLEN&HEATH
GL2800M service manual
AP7177 Issue 2
Page - 12 - of 13
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