This mixer looks, feels and performs like a true workhorse. Like its siblings in the GL range, we built GL4000 to be equally at home in the front-of-house position or in monitor land. We also packed in a really serious set of live recording tools (someone always wants a tape of the show don’t they?)
Although we’ve certainly been generous with the feature set, we were determined to make GL4000 really simple to use, so anyone with reasonable mixing skills should be able to use one to run a world-class show with a bit of practice. Our efforts have been rewarded by the sight of so many GL4000s succeeding in high-profile roles where you’d normally expect to find something costing 10 times more

We offer 4 versions so that customers can choose the one best suited.

A - All mono channels (2 stereo returns above the masters)
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B - 4 full stereo channels to right of masters
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C - 4 full stereos to extreme right
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D - 8 full stereos to right of masters
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Technical Specifications
0 dBu = 0.775 Volts rms

Operating levels
Internal operating level 0dBu - channels, -2dBu mix
Internal headroom +21dB channels, +23dB mix to output
Max outputs balanced +27dBu >2k ohm max load
Unbalanced +21dBu >2k ohm
Channel inserts 0dBu
Output inserts -2dBu

Frequency Response Measured 20Hz to 20khz ref 1khz
Mic to mix (+40dB) +0/-0.5dB
Line to mix (0dB) +0/-0.5dB

Distortion THD + noise measured @ 1khz +20dbu
Mic to mix (+40dB) 0.006%
Line to mix (0dB) 0.006%

Crosstalk Referred to driven channel @ 1khz
Channel to channel >100dB
Mute shutoff >85dB
Fader shutoff >90dB

C.M.R.R. Common mode rejection @ 1khz
Mic (+40dB) >80dB
Line (0dB) >55dB

Noise Performance Measured rms 22Hz TO 22kHz Bandwidth
Mic ein -128dB 150ohm source
Line pre-amp (0dB) <-91dBu
Residual output noise <-98dBu (-102dB S/N)
MIX noise, nothing routed <-87dBu (-91dB S/N)
MIX noise, 24 channels routed <-81dBu (-85dB S/N)

Metering
Input meters 4 segment led (signal, 0, +6, peak)
Mix meters 4 segment led (signal, 0, +6, peak)
Output meters 12 segment led
Led meter response Peak reading
Peak indicators 0n 5dB before clipping
Signal indicators on -20dBu
Integral VU meterbridge illuminated VU moving coil meters

Accessories
Expander (up to 48 channels max)
GL4000-8M 8 mono channels expander
GL4000-4SM 4 stereo, 4 mono expander
GL4000-4MS 4 mono, 4 stereo expander
Sys-Link™ GL4000-SL Sys-Link™ expander option
Power Supply RPS11 300W rack power unit with DC cable
RPSD2 Dual supply combiner/monitor