Soundcraft GB8-48 - 48-Channel Analog Mixing Console with 11x4 Output Matrix and 8 Auxiliary Sends/8 Group Sends in Dark Blue Finish

The Soundcraft GB8-48 is a 48-channel analog mixing console designed for professional audio environments such as churches, performance venues, and small touring sound systems. With a robust 8-bus architecture and a versatile 11x4 output matrix, this console offers extensive control over complex audio setups. The GB8-48 is ideal for both front-of-house (FOH) and monitor duties, making it a flexible solution for sound engineers in various live sound scenarios.

Built with Soundcraft's renowned GB30 mic preamps and 4-band GB30 equalizers, the GB8-48 ensures pristine audio quality with low noise, high headroom, and exceptional clarity. Each of the 48 mono input channels includes individually switched 48V phantom power, providing compatibility with condenser microphones and other powered devices. Additionally, the console offers 4 full-feature stereo channels, giving engineers flexibility when handling stereo sources such as keyboards, playback devices, or effects returns.

The GB8-48 features 8 auxiliary sends, all of which can be switched between pre- and post-fader operation, making it easy to configure monitor mixes, effects sends, or other auxiliary signal needs. The 8 group sends can be swapped with the 8 aux sends for flexible routing, and four stereo returns are included for additional input options. For even more control, the console incorporates four mute groups, allowing the user to mute multiple channels simultaneously with a single button press, which is particularly useful in live sound environments.

One of the standout features of the GB8-48 is its 11x4 output matrix, which allows engineers to route audio from the group busses and main L, R, and C (mono) outputs to four independent matrix outputs. This functionality is particularly beneficial for sending audio to different zones, broadcast feeds, or recording devices, adding a layer of routing flexibility to the mixing process. Another unique feature is the built-in limiter on both the record output and the alternate stereo output, ensuring clean, distortion-free recordings.

The GB8-48 includes an integrated meter bridge with accurate VU meters that emulate the ballistics of traditional VU meters, providing clear and precise monitoring of the left, right, and center outputs. For additional system testing and troubleshooting, the console also features a 1kHz oscillator. The rugged steel chassis with a sloping rear connector panel makes it easy to access and configure connections, whether the console is used in a permanent installation or a portable sound system.

The GB8-48 is designed to withstand the rigors of professional use, with all input modules constructed using individual vertically-mounted PCBs and individually-nutted potentiometers. This ensures long-term reliability and durability, even under demanding conditions. The console's integral power supply includes a link option for connecting an external backup PSU, providing added reliability in mission-critical environments.

The GB8-48 shares the sleek design and high-quality construction of the MH4, MH3, and LX7ii consoles, maintaining a consistent look and feel across Soundcraft's range of professional mixing consoles. Whether used for live sound reinforcement or recording, the GB8-48 delivers the performance, flexibility, and reliability that professionals expect from Soundcraft products.

Features

• 48 input channels (44 mono and 4 stereo) with GB30 mic preamps and 4-band GB30 EQ
• 11x4 output matrix for advanced audio routing to multiple zones or outputs
• 8 auxiliary sends, switchable between pre- and post-fader operation
• 8 group sends, which can be swapped with the 8 aux sends for flexible configuration
• 4 stereo input channels and 4 stereo returns for additional input options
• 4 mute groups for easy control over multiple channels simultaneously
• Limiter on the record output and alternate stereo output for distortion-free recordings
• Direct outputs on all mono input channels for live recording or external processing
• Meter bridge with accurate VU meters for monitoring left, right, and center outputs
• 1kHz oscillator for system testing and calibration
• Rugged steel chassis with sloping rear connector panel for easy access to connections
• Integral power supply with external backup PSU link option for added reliability
• All-metal TRS jacks and Neutrik XLR connectors for robust signal connections
• Noise: Mic E.I.N. @ unity gain, 150? source impedance: -128dBu
• Weight: 93 lbs
• Dimensions: 70.6 x 25.83 x 6.26 inches

Specifications

• Noise (Measured RMS, 22Hz to 22kHz Bandwidth)
  • Mic E.I.N. @ 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: <1dB
• THD + N
  • Mic sens. -30dBu, +20dBu at all outputs @1kHz: <0.006%
• CMRR
  • Typical @ 1kHz: 80dB
• Input and 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 and Output Impedances
  • Mic Inputs: 2kΩ
  • Line Inputs and Stereo Returns: 10kΩ
  • Mix, Group, Aux, Matrix & Direct outputs: 150Ω
  • Insert Sends: 75Ω
  • Insert Returns: 5kΩ
  • Recommended Headphone Impedance: 600Ω