Soundcraft GB4-40 40-Channel Mixer

£2,943.00 RRP £3,390.00 (including VAT @ 20%)

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  • 40-Channel Analogue Mixer
  • 4 Stereo Input Channels
  • 4 Subgroup Outputs
  • Matrix Mixer
  • GB30 Microphone Preamplifiers

Soundcraft GB4-40 40-Channel Mixer

The Soundcraft GB4-40 is a high-performance 40-channel mixer featuring 4-band EQ's on each channel and 8 Aux sends. The GB4 was designed by Graham Blyth to celebrate Soundcraft's 30th anniversary. These premium-quality mixing desks featuring professional-grade components that Soundcraft are infamous for. With its multitude of high quality components and rugged, stylish build; this mixer is ideal for FOH or monitoring applications.

Product Ref: 38513

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Versatile Functionality

The GB4-40 can be used for both front of house and monitor duties enabled by dual-mode topology with fader control of group or aux outputs. There are four mute groups to allow several channels to be muted simultaneously, the limiter on a set of dedicated record outputs makes it easier to create a stereo recording of the mix. The GB4-40's output matrix has seven feeds to four outputs, being fed from the group buses and the main L, R and C mono outputs.

Industry Standard Construction

The console is hard wearing and sturdy, designed for heavy use at an industry standard level. All input modules are constructed with individual vertically-mounted PCBs fitted to the steel chassis front panel with individually-nutted potentiometers. The rear connector panel slopes so it is easier to configure from the front of the desk, and the integral power supply has a link option for an external backup PSU.

Expansive Connectivity

As well as delivering everything you'd expect from a GB Soundcraft mixing console, the GB4 features 32 mono input channels with each channel featuring GB30 microphone pre's and 4-abdn GB30 EQ section for maximum control and versatility over your inputs. This combination of premium-quality microphone preamps and the 4-band EQ results in a versatile yet powerful performance delivering studio-quality audio in a convenient mixing solution. Additionally there is direct outputs on every mono channel plus 8 auxiliary send with flexible pre/post switching. When it comes to monitoring the GB4 features 4 segment LED's on each output and 12 segment output meters allowing to monitor your mixes at a quick glance.


  • Total Number of Inputs: 40
  • Mic/Line Inputs:
    • 40 Line:
    1/4" TRS Phone
  • 40 Microphone: 3-pin XLR
  • Stereo Line Inputs:
    • 4 Stereo:
    L/R Paired 1/4" Phone Line & 3-pin XLR Microphone
  • In-Line Inputs/Returns: No
  • AUX Sends: 8 Aux Sends
  • AUX Returns: 4 Stereo Returns
  • Inserts: 1/4" TRS Phone - Mono Inputs, Main Output and Subgroup Outputs
  • BUS (Group) Outputs:
    • 4 Subgroups:
    Balanced 3-pin XLR
  • 2 Track Master I/O:
    • Mix L/R:
    Stereo Paired 3-pin XLR Balanced
  • ALT I/O:
    • ALT Stereo:
    L/R Stereo Paired 1/4" Output
  • Monitor Outputs
    • Monitor:
    L/R Stereo Paired 1/4" TRS Phone
  • EQ Section
    • High Filter:
    13kHz, +/- 15dB, 2nd order shelving
  • Hi-Mid: 550Hz - 13khz, +/- 15dB, Q=1.5
  • Lo-Mid: 80Hz - 1.9kHz, +/- 15dB, Q=1.5
  • Low Filter: 80Hz, +/- 15dB, 2nd order shelving
  • Solo/Mute: All Input Channels
  • Channel Level Control: 100mm Faders
  • Trim/Gain Control: Rotary Potentiometers
  • Phantom Power: +48V Phantom individually switched
  • Metering:
    • Input Channels:
    Single tri-colour 4-segment LED bar graph
  • Outputs: 7 tri-colour 12-segment LED bar graphs, + Meter pod with 3 VU meters (L/R/C)
  • Frequency Response: 20Hz to 20kHz
    • Signal-to-Noise Ratio:
      • Measured RMS, 22Hz to 22kHz Bandwidth
      • -128dBu:
      Mic E.I.N. @ unity gain, 150 ohms source impedance
    • Mix Output, 40 inputs routed to mix
    • Group & Center Outputs
    • Aux Outputs
    • Matrix Outputs
  • Total Harmonic Distortion (THD):
    • Mic sens. -30dBu, +20dBu at all outputs @ 1kHz
  • Power Supply:Internal AC PSU - 85V, 270V AC, 50/60Hz universal input
  • Power Consumption: Less than 150W
  • Dimensions:(WxHxD): 1523 x 235 x 656mm
  • Weight: 37 kg

For more information on the GB4-40 please refer to the PDFs above.