SOUNDCRAFT GB2

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.

FEATURES：
•	16, 24, 32 channel frame sizes	•	12 busses
•	2 full feature stereo channels	•	2 stereo return (on stereo channels)
•	6 Aux sends	•	4 sub group (paired)
•	6 x 2 output matrix	•	GB30 mic preamp and precision equalisation circuitry
•	Direct output on every channel	•	Talkback facility
•	100mm faders	•	Switchable 48V phantom powering on every channel
•	100Hz high pass filter	•	12-segment LED metering
•	Record output

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%
Noise	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
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	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
Metering	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	Power consumption	Less than 150W
Operating conditions	Temperature range	-10ºC to +30ºC
Operating conditions	Relative humidity	0% to 80%

Note:These figures are typical of performance in a normal electromagnetic environment and are often exceeded. Performance may be degraded in severe conditions. All measurements refer to electronically balanced inputs and outputs.

GB Series Brochure

User Guide