Soundcraft GB4 40 Channel Mixing Console
40-channel frame size / GB30 mic preamps / Precision equalization circuitry / Direct outputs on every channel / Talkback facility / 100mm faders
The 40 Channel GB4 console sets a new standard in affordable high-end mixing. It is laden with capabilities and quality features: GB30 mic preamps, reengineered circuit topology and EQ designs, rigid steel chassis, high-quality vertically mounted fiberglass PCB channel strips, individually nutted potentiometers, angled rear panel that allows patching from the front, and more above all, the quality, engineering, and design for which Soundcraft is famous.
The GB4-40 is 40-channel, 4-bus console designed and constructed to ensure rugged reliability under stressful tour conditions. All input modules have individual vertically-mounted PCB's fitted to the steel chassis.
It is designed for performance venue installation or small touring system applications. The dual-mode topology allows it to to be used for FOH or monitor duties, with fader control of group or aux outputs.
Although largely conventional in layout, the GB4 does have some unique mechanical features. The rugged steel chassis has a sloping rear connector panel so that it is easier to configure from in front of the desk, while the integral power supply has a link option for an external backup PSU.
4 mute groups allow several channels to be muted simultaneously. Another unique feature is the limiter on a set of dedicated record outputs that makes it easier to create a stereo recording of the mix.
The console also features an output matrix with 7 feeds to 4 outputs, fed from the group buses and main L, R, and C (mono) outputs.
The GB4 offers a comprehensive set of functions in a small and cost-effective footprint, and delivers the high performance and reliability you expect from a Soundcraft product.
Soundcraft RW5693SM GB4 40 Channel Mixing Console Features:
- 40-channel frame size
- GB30 mic preamps
- Precision equalization circuitry
- Direct outputs on every channel
- Talkback facility
- 100mm faders
- Switchable 48V phantom powering on every channel
- 18dB/octave high-pass filter
- 4 mute groups
- 12-segment LED metering
- Record output with limiter
- 2 full-feature stereo channels
- 2 stereo returns
- 8 aux sends (4 are pre/post switchable)
- 4 sub groups (SWAP with Auxes 1-4)
7x4 output matrix
40 Mono, 4 Stereo Input Channels
The GB4 series is available in a variety of frame configurations. This model features 40 mono and 4 stereo inputs
4 Subgroup Outputs
The GB4 series feature 4 group outputs for routing to external recorders, monitors, etc.
The matrix output mixer provides added routing flexibility.
8 Auxiliary Sends
8 auxiliary sends provide plenty of routing to external effects, monitors, etc.
All mono inputs provide direct outputs for direct routing to recorders, mixers, etc.
GB30 Microphone Preamplifiers
Soundcraft's GB30 microphone preamplifiers provide an ultra low-noise floor while maintaining high output gain.
Integrated Meter bridge
The GB4 series features an integrated LED and VU meter bridge for accurate metering of input and output level.
Soundcraft RW5693SM GB4 40 Channel Mixing Console Specifications:
- Frequency Response:
Mic/Line Input to any output, 20Hz - 20kHz <1dB
- THD + N:
Mic sens. -30dBu, +20dBu at all outputs @1kHz <0.006%
Measured RMS, 22Hz to 22kHz Bandwidth
Mic E.I.N. @ unity gain,150Ω source impedance -128dBu
Mix Output, 40 inputs routed to mix <-82dBu
Group & Centre Outputs <-83dBu
Aux Outputs (GB2 Groups only) <-80dBu
Matrix Outputs <-89dBu
- Crosstalk (@1kHz, typical):
Input Channel Mute <-97dB
Input Fader cut-off <-95dB
Pan isolation <-75dB
Mix route isolation <-97dB
Group route isolation <-97dB
Adjacent channel crosstalk <-99dB
Group to Mix <-84dB
Aux Send pots offness (typical) <-84dB
Matrix Send pots offness (typical) <-84dB
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 2 x 250mW into 200Ω
- Input & Output Impedances:
Mic Inputs 2kΩ
Line Inputs and Stereo Returns 10kΩ
Input channels Insert Return 5kΩ with EQ in, otherwise 3kΩ
Mix, Group, Aux, Matrix & Direct outputs 150Ω
Insert sends 75Ω
Recommended Headphone Impedance 100 - 600Ω
- High pass filter (Mono input):
100Hz, 18dB per octave
- EQ (Mono input):
HF 13kHz, +/-15dB, 2nd order shelving
Hi-Mid 550Hz-13kHz, +/-15dB, Q=1.5
Lo-Mid 80Hz-1.9kHz, +/-15dB, Q=1.5
LF 80Hz, +/-15dB, 2nd order shelving
Input channels (GB4/GB8) Single tri-colour 4-segment LED bargraph
Outputs (GB4) 7 tri-colour 12-segment LED bargraphs
Outputs (GB8) 11 tri-colour 12-segment LED bargraphs + Meterpod with 3 VU meters (L/R/C)
Outputs (GB2) 2 tri-coloured 12-segment LED bargraphs (indicates monitor source level)
- Power consumption:
AC mains supply (internal PSU) 85V-270V AC,
50/60Hz universal input
Power consumption Less than 150W
- Operating conditions:
Temperature range -10ēC to +30ēC
Relative humidity 0% to 80%