SoundCraft 1GB2 manual Typical Specifications, Noise

Typical Specifications

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 (@1kHz, typical)
Input Channel Mute	<-93dB
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
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 & Output Max Levels
Mono & Stereo Mic Inputs	+15dBu
Mono Line Inputs	+30dBu
Stereo Line Inputs	+20dBu
Insert Returns	+20dBu
Any output	+20dBu
Nominal Operating Level	0dBu
Headphone Power	2x250mW into 200Ω
Input & Output Impedances	2kΩ
Mic Inputs
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 - 600Ω

GB2 User Guide 33