SoundCraft GB4 - Manual (Page 35)

35 GB4 User Guide
TYPICAL SPECIFICA TYPICAL SPECIFICA TYPICAL SPECIFICA TYPICAL SPECIFICA TYPICAL SPECIFICATIONS TIONS TIONS TIONS TIONS
Noise
Measured RMS, 22Hz to 22kHz Bandwidth
Mic E.I.N. @ unity gain,150
Ω 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) <-89dB
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 & Stereo Line Inputs +30dBu
Stereo Returns & Insert Returns +20dBu
Any output +20dBu
Nominal Operating Level 0dBu
Headphone Power 2x250mW into 200 Ω
Input & Output Impedances
Mic Inputs
2k Ω
Line Inputs and Stereo Returns 10k Ω
Input channels Insert Return 5k Ω with EQ in, otherwise 3kΩ
Mix, Group, Aux, Matrix & Direct outputs 150
Ω
Insert sends 75 Ω
Recommended Headphone Impedance 50 - 600 Ω