Allen & Heath 48 Channel Dual Mixing Console

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allen & heath gl4000m848a
The GL4000 offers the professional user an uncompromised feature set and performance for live sound engineering and recording. The console is available in 24, 32, 40 and 48 channel sizes with an external 3U rack power unit. All mono channels (2 stereo returns above the masters)

FEATURES:
Dual Functionality
GRP/Aux Mode switches reverse aux faders with the group and L&R faders giving up to 10 monitor sends with inserts on 100mm faders. A Centre Mode switch converts the 100mm C fader to engineer's listen wedge control with insert

8 Audio Groups
Assigned from paired routing buttons and pan from channels. Groups access LR & M busses and have XLR outputs with inserts. Groups have 4 segment led pre-fade meters and 12 segment, 3 colour peak reading meter access plus VU meters in meterbridge on outputs

10 Auxiliary Sends
10 auxiliaries switchable pre/post fade in blocks: 1-4, 5-8, 9-10. Aux 10 can control the direct out. Aux masters have pre-fade metering, faders and mutes.
Auxes 1-4 have matrix link switches to allow groups, LR & M access to the aux buss. All auxes have inserts and XLR outputs and can be controlled by the main faders if desired

Left Right and Mono busses
Available from channels and groups. LR & M have 12 segment, 3 colour peak reading meter access plus VU meters in bridge. GL4000 also includes secondary L&R output with level and pre/post fader select on TRS jacks (can swap with the aux 9-10 XLR outs with inserts)

11x4 Matrix
Fed from the groups and the LR & M busses. Matrix outputs are on XLRs with inserts. Aux link switches feed the matrix into the aux buss for expanded sends from all the console sections

8 Mute Groups
8 master mute group buttons with single / multi mode and preview facility. Groups are edited off-line' and channels can be made safe'. Input channels, auxes, groups, and LRM sections all have soft' mute buttons

4 Band EQ plus HPF
Separate controls for sweep and cut/boost on all sections. Mid bands have switchable Q. HPF is swept from off-20-400 Hz

Dual Stereo Channels
The GL4000 can be ordered with 0, 4 or 8 stereo input channels with dual inputs: XLR mic/line with insert and stereo (TRS) jack with width control, polarity reverse on right input signal and stereo PFL. A direct to L-R button routes the stereo line-in to the mix buss, allowing the channel to be used on the XLR input alone if desired. Either source can use the main channel with 4 band EQ and 10 auxiliary sends

Trim pots
The channel direct outputs and group outputs can be controlled by trim controls, selectable pre / post fader. ideal for recording applications

Balanced XLR & Inserts
Gold plated connectors and separate balanced send and return inserts (TRS) on channels, auxes, groups, and LRM busses

PAFL system
Stereo PFL with trim. Quicksolo (solo-in-place') with last solo / mix toggle facility. Channels can be made solo safe'

128 Mute Patches
Show control of 128 patch memories with midi interface and display. Patch recall can be manual or auto increment

Talkback
Talk to the groups, auxes, matrix and LRM outputs. +48V and trim control for mic

Engineer's Toolbox
2 headphone, wedge and local monitor controls, - 20dB dim' when TB active. Stereo / mono selection, direct outs and groups can be trimmed' for recording
• Lamps:
2 XLR lamp sockets are provided

PSU
RPS11 300W 3U rack mounting supply. Optional RPSD2 1U dual supply combiner allows 2 PSU's to link up to the console for redundant supply backup, with monitoring

TECHNICAL SPECIFICATIONS:
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
























Additional Information

UPCN/A
SKUGL4000M848A
ManufacturerAllen & Heath
Product ConditionNew - On Clearance
ReturnableNo

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