Soundcraft GB8 High Performance Analog Mixer

Fitting a comprehensive set of functions into a compact, cost-effective build, the GB8 from Soundcraft is a high-performance analog mixer. It’s ideal for medium-sized installations such as houses of worship or performance venues, but it’s also a great choice for small touring sound systems. In addition, GB8 boasts dual-mode topology equips you for fader control of group or aux outputs, so you can also use this mixer for FOH or monitor duties.

Some of GB8’s features include a rugged steel chassis with a sloping rear connector panel, allowing it to be easily configured from the front of the desk, along with an integrated power supply with a link option for external PSU backup. Four mute groups allow you to mute several channels at the same time. A limiter on both the Record and Alternate stereo outputs lets you create a stereo recording of your mix using a selected set of record outputs. An output matrix contains 11 feeds to 4 outputs, being fed from the group busses and main L, R, and C (mono) outputs. A 1kHz oscillator and a meter bridge with 3 LED meters that emulate the ballistics of VU meters.

Soundcraft GB8 Features

• Dual purpose console
• 24, 32, 40 and 48 channel frame sizes
• Individually switched 48V phantom power on every mono input module
• 4 full-feature Stereo channels
• 8 Aux sends (all switchable between pre/post fader operation)
• 8 Group sends (SWAP with all 8 Auxes)
• 4 Stereo returns
• 4 Mute groups
• 11x4 Output Matrix
• Limiter on Record Output and Alternative Stereo Output
• GB30 mic pre-amp
• 4-band GB30 EQ
• 1kHz oscillator
• Meter Bridge with accurate VU meters for left, right, and center outputs
• Integral power supply, with an external power supply link option
• All metal TRS jacks and Neutrik XLRs
• Direct outputs on all mono input channels

• GB8 Analog Mixer1
• Power supply cable1

• Noise (measured RMS, 22Hz to 22kHz bandwidth)
  • Mic EIN @ Unity Gain, 150W Source Impedance: -128dBu
  • Mix Output, 40 Inputs Routed to Mix: <-82dBu
  • Group Outputs: <-83dBu
  • Aux Outputs: <-80dBu
  • Matrix Outputs: <-89dBu
• Crosstalk (@ 1kHz typical)
  • Input Channel Mute: <-97dB
  • Input Fader Cut-Off: <-95dB
  • Pan Isolation: <-77dB
  • Mix Route Isolation: <-97dB
  • Group Route Isolation: <-97dB
  • Adjacent Channel Crosstalk: <-99dB
  • Group to Mix: <-89dB
  • Aux Send Pots Offness (typical): <-84dB
  • Matrix Send Pots Offness (typical): <-84dB
• Frequency Response (mic/line input to any output, 20Hz - 20kHz)<1 dB
• THD+N (mic sens. -30dBu, +20dBu at all outputs @ 1kHz)<0.006%
• CMRR (typical @ 1kHz)80dB
• Input & Output Max. Levels
  • Mono & Stereo Mic Inputs: +15dBu
  • Mono & Stereo Line Inputs: +30dBu
  • Stereo Returns & Insert Returns: +20dBu
  • Any Output: +20dBu
  • Nominal Operating Level: 0dBu
  • Headphone Power: 2x250mW into 200Ω
• Input & Output Impedances
  • Mic Inputs: 2kΩ
  • Line Inputs & Stereo Returns: 10kΩ
  • Mix, Group, Aux, Matrix & Direct Outputs: 150Ω
  • Insert Sends: 75Ω
  • Insert Returns: 5kΩ
  • Recommended Headphone Impedance: 50-600Ω

More about Soundcraft’s GB Analog Mixers

Soundcraft’s acclaimed GB Series of analog mixers boasts high-quality engineering, innovative design, and painstaking details.

Rugged and reliable, its mechanical construction has been crafted to endure strenuous conditions, so you get the best performance out of your audio mix no matter how much punishment you give your gear. All input modules are made with individual, vertically mounted PCBs that have been carefully fitted to the front panel of the steel chassis with individually nutted potentiometers.

GB mixers share the stylish aesthetic of Soundcraft’s MH4, MH3, and LX7ii consoles, for a consistent look and feel across their product range. This allows you to get great sound out of great-looking gear.