Soundcraft GB2-24, GB2-32, GB2-16 User Manual

TYPICAL SPECIFICATIONS

Frequency Response Mic/Line Input to any output, 20Hz - 20kHz ...................................... <1dB

THD + N Mic sens. -30dBu, +20dBu at all outputs @1kHz.......................... <0.006%

GRAHAM BLYTH

In the year of our 30th anniversary, Soundcraft

co-founder and Technical Director Graham Blyth has

taken a well established and classic Soundcraft

microphone preamplifier to a new level of performance,

resulting in the new GB30 preamp which boasts

extraordinary clarity with exceptionally controlled

overload characteristics.

Soundcraft’s legendary 4-band EQ has also been

improved further with the addition of elements derived

from Soundcraft’s highly successful MH Series consoles.

This new design delivers the sound of the classic ‘British

EQ’ enhanced even further with more focused HF and LF

shelving sections.

Noise Measured RMS, 22Hz to 22kHz Bandwidth

Mic E.I.N. @ unity gain,150Ω source impedance ........................... -128dBu

Mix Output, 32 inputs routed to mix .............................................. <-85dBu

Group Outputs ............................................................................... <-85dBu

Aux Outputs ................................................................................... <-83dBu

Matrix Outputs............................................................................... <-89dBu

Crosstalk Input Channel Mute......................................................................... <-93dB

(@1kHz, typical) Input Fader cut-off........................................................................... <-92dB

Pan isolation ................................................................................... <-70dB

Mix route isolation........................................................................... <-93dB

Group route isolation....................................................................... <-93dB

Adjacent channel crosstalk.............................................................. <-99dB

Group to Mix.................................................................................... <-90dB

Aux Send pots offness (typical) ....................................................... <-80dB

Matrix Send pots offness (typical) ................................................... <-80dB

CMRR Typical @ 1kHz .................................................................................... 80dB

Input & Output Mono & Stereo Mic Inputs.............................................................. +15dBu

Max Levels Mono Line Inputs............................................................................ +30dBu

Stereo Line Inputs........................................................................... +20dBu

Insert Returns .................................................................................+20dBu

Any output ...................................................................................... +20dBu

Nominal Operating Level ..................................................................... 0dBu

Headphone Power.................................................... 2 x 250mW into 200Ω

Input & Output Mic Inputs ............................................................................................ 2kΩ

Impedances 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 ......................................... 50 - 600

4-BUS PROFESSIONAL MIXING CONSOLE

Soundcraft Registered Community Trade Mark/RTM No. 000557827

SOUNDCRAFT

HARMAN INTERNATIONAL INDUSTRIES LTD.,
CRANBORNE HOUSE, CRANBORNE ROAD
POTTERS BAR, HERTS, EN6 3JN, UK
T: [phone]
F: [phone]
E: [e-mail]

SOUNDCRAFT USA

8500 BALBOA BLVD.
NORTHRIDGE, CA 91329, USA
T: [phone]
F: [phone]
E: [e-mail]

www.soundcraft.com

Soundcraft reserves the right to improve or otherwise alter any
information supplied in this document or any other documentation
supplied hereafter. E&OE 05/06
This equipment complies with the EMC Directive 89/336/EEC

Power consumption AC mains supply (internal PSU) 85V-270V AC,

50/60Hz universal input

Power consumption............................................................ Less than 150W

Operating conditions Temperature range............................................................. -10ºC to +30ºC

Relative humidity........................................................................ 0% to 80%

DIMENSIONS

Frame Size Width (Y) Width (X) Weight

16 Ch 790mm (31.10") 688mm (27.07") 22kg (48.5lbs)
24 Ch 1013mm (39.88") 911mm (35.87") 25kg (55.1lbs)
32 Ch 1247mm (49.09") 1145mm (45.08") 30kg (66.15lbs)

Dimension Y

Dimension X

656mm (25.81")

Note: These figures are typical of performance in a normal electromagnetic environment.
Performance may be degraded in severe conditions. All measurements refer to
electronically balanced inputs and outputs with VCAs enabled. Input and output
transformers may affect these specifications.

10mm (0.38")

159mm (6.24")

GB2 OVERVIEW GB2 SYSTEM BLOCK DIAGRAM

INPUTS

KEY FEATURES

• 16, 24 and 32 channel configurations

• Individually switched 48V phantom power on
every input module

• 6 Aux sends

• 4 Sub groups (paired)

• 6 x 2 Output matrix

• GB30 mic pre-amp

• 4-band GB30 EQ

• Integral power supply, with an external power
supply link option

• All metal TRS jacks and Neutrik XLRs

• Direct outputs on all mono input channels

The GB2 is the latest addition to the Soundcraft GB Series,
featuring 4 group busses configured as 2 stereo subgroups and
an integral 6 x 2 matrix. Intended for installed-sound and
Audio-Visual applications that do not require the functionality
provided by the GB4 or GB8, the GB2 is available in frame
sizes of 16, 24 and 32 mono inputs, each with 2 stereo inputs
as standard. Each input features the high-performance GB30
Mic Pre and GB30 Equaliser designs of the GB4 and GB8,
along with 6 Aux buses.

Four Subgroups are provided as two stereo pairs, with a unique
facility for adjusting the width of the stereo signal across the
stereo mix. The channel pan settings are retained on the group
outputs, while the degree of stereo separation to the mix bus is
independently adjustable from full stereo through to mono. The
GB2 also features two stereo input channels, with separate mic
and line inputs. In normal use, the mic inputs are routed to the
local channel and the line inputs act as a stereo return to the
mix bus. Selecting the LINE input to the local channel overrides
the Mic inputs.

Mono Inputs

Individual +48V Phantom Power switch
Phase Reverse switch
Mic Input with 10 to 60dB gain (Line Input -20dB)
100Hz HPF
Insert point
4-band EQ with sweep mids
6 Auxes, 1&2 pre, 3&4 pre/post, 5&6 post (user option for
5&6 follow 3&4, and pre-fade=pre-EQ)
Mute switch with LED
Routing to Stereo Mix, Sub Group 1-2, Sub Group 3-4
Peak & Signal LEDs
PFL switch with LED
Channel direct out with pre/post switch (switch on rear con)

Stereo Inputs

Stereo Mic Inputs with 10 to 60dB gain
Individual +48V Phantom Power switch
Phase Reverse switch
Separate Stereo Line Input, with Level Control, switchable direct to Mix
as a stereo return, or into local channel (replacing Mic signal)
Stereo/Mono source switching
4-band EQ
Auxes and routing as Mono Inputs

Sub Groups

Sub Group inserts
Separate L-R Sub Group Faders
Sub Group outputs on XLRs
Sub Group routing to Mix, with Width control
PFL with LED

Mix Outputs

Mix Inserts
Stereo Mix Fader
Mix Outputs on XLRs
Mono Sum Output on XLR

Other features

6x2 Matrix (Groups, L, R)
Matrix master level controls with MUTE & AFL switches, & LEDs
Matrix Outputs on XLRs
Aux master controls with AFL switches and LEDs
Aux Outputs 1-4 on XLRs, 5-6 on TRS jacks
Headphone and Control Room outputs with level control
Monitor switching for 2-TK Replay, Mix, Sub 1-2 & Sub 3-4
2-TK replay routing switch to Mix
Dual 12-segment LED Peak Reading output metering
Talkback mic input, routing to Aux 1-4 and Subgroups
Record outputs on RCA Phonos
2-TK Replay inputs on RCA phonos
2 Lamp connectors

MASTER
SECTION

GB2 Mono
Input Channel

GB2 Stereo
Input Channel