Downloads
Block diagrams - 561KB pdf
Dimensions - 91KB pdf
Connector info - 216KB pdf
Tech specs - 13KB pdf
Syslink applications guide - 165KB pdf
Cue Sheet - 536KB pdf

• 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
• Formats: 24, 32 or 40 channels - either all mono or with 8 stereo channels. Was also available part-loaded. Meterbridges were optional
• 8 Audio groups. Assigned from paired routing buttons and pan from channels. Groups access LR & M busses and have XLR outputs with insert. Groups have 3 segment led pre-fade meters and 12 segment, 3 colour peak reading meter access, plus VU meters if meterbridge is fitted
• 10 auxiliaries switchable pre/post fade in blocks: 1-4, 5-8, 9-10
• Left, Right and Mono busses. Available from channels and groups. LR & M have 12 segment, 3 colour peak reading meter access plus VU meters if meterbridge is fitted. GL4 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)
• 11x2 Matrix. Fed from the groups and the LR & M busses
• 8 Mute groups. 8 master mute group buttons with single / multi mode and preview facility. Input channels, auxes, groups and LRM sections all have mute buttons
• 4 band EQ plus HPF. Separate controls for sweep and cut/boost on all sections. HPF is swept from off-20-400 Hz
• Stereo channels. GL4 could be ordered with blocks of 8 stereo channels, each with individual gain input stages for left and right sources
• PAFL system. Stereo PFL with trim
• Talkback. Talk to LRM, groups and auxes. Trim control for mic
• Lamps. 2 BNC lamp sockets are provided
• PSU. The GL4 was supplied with a RPS10 rack mounting (3U) linear power supply. A backup RPS10 could be linked via an RPSD power supply combiner and auto-switcher

• Equalisation - Both consoles have excellent four-sweep EQ. However, the GL4000 adds switched 'Q' on the mids. This gives even greater accuracy than before, and is ideal for elimination of feedback or creative sound shaping.
• Balanced inserts on inputs and outputs - The GL4 had single jack inserts whereas the GL4000 offers greater elimination of induced noise by offering balanced connection to all inserted devices. This applies to the input channels, the aux outputs, the group outputs and the Left, Right and Mono outputs.
• Increased LED metering - The GL4000 gives you four-LED input meters, four-LED mix meters on the groups, Left, Right, Mono and auxes, and 12-LED switchable output meters.
• Four way matrix - The GL4000 gives you four matrix sends on the groups and Left, Right and Mono sections switchable pre/post fade make ideal additional monitor sends, recording feeds, delay speaker feeds, FX feeds etc.
• Matrix to aux switching on the GL4000 - This allows you to set up very quick monitor, FX or recording sends based on your sub-groups instead of your channels.
• GL4000 Group output trims - The group outputs, which are normally redundant in FOH mode, can be used for recording and the trim controls can be set pre-fade for optimum level to tape.
• Trimmable Direct Outputs - The GL4000's direct outputs can be trimmed by the aux 10 pot either pre- or post-fader. This is ideal for recording feeds or spot effects.
• Stereo PFL - The GL4000's stereo inputs can be PFL'd and metered in stereo for true monitoring of stereo sources.
• Width Control on Stereo Inputs - The GL4000's stereo input can be transformed into mono, reverse stereo, with Land R swapped, or enhanced wide stereo for a more impressive stereo image.
• Mute Control - The GL4000's QuickSolo, 8 mute groups and 128 midi-controllable mute patches give you more mute control than before.