Allen & Heath                                                       8                GS_R24 User Guide 
Operating Levels  
Inputs   
Mono channel (XLR) Input  -6 to –60dBu for nominal (+14dBu in max) 
Mono channel Line Input (Jack socket)  +14 to –40dBu (+34dBu maximum) 
Insert point (TRS Jack socket)  0dBu nominal +21dBu maximum 
Stereo Input (Jack sockets)  0dBu nominal (control = Off to +10dB) 
Stereo input (phono sockets)  0dBu nominal (control = Off to +15dB) 
Valve channel (XLR)  -10 to –60dBu for nominal (+10dBu max) 
Valve channel (Line)  +10 to –40dBu for nominal (+30dBu maximum) 
Valve channel (Inst gain boosted)  -16 to –66dBu for nominal (122mV to 0.388mV rms) 
2 Track Input (phono or TRS jack sockets)  0dBu nominal +21dBu maximum 
   
Outputs   
Main (2 Track 1) L-R  (XLR) & Groups 1-4 (TRS Jack)  +4dBu nominal. +27dBu maximum. 
L-R Insert & Group Inserts (TRS Jack socket)  0dBu nominal +21dBu maximum 
2 Track 2 Outputs (Jack sockets)  0dBu nominal. +21dBu maximum. 
All other analogue outputs  0 nominal +21dBu maximum 
   
Headroom 
Analogue headroom from nominal (0Vu)  21dB 
Analogue headroom at Mix summing amplifier  23dB 
Frequency Response 
Mic in to Mix L/R Out, 10dB gain  +/-1dB 10Hz to 130kHz. 
Line in to Mix L/R out 0dB gain  +/-0.5dB 20Hz to 20kHz 
Stereo in to Mix L/R out  +/-0.5dB 20Hz to 40kHz 
Mic in to Mix L/R Out, 30dB gain  +/-0.5dB 20Hz to 80kHz. 
Mic in to Mix L/R Out, 50dB gain  +/-1dB 20Hz to 80kHz. 
THD+n 
Mic in to Mix L/R Out, 10dB gain 1kHz +10dBu out (DC to 22kHz)  0.0015%  
Mic in to Mix L/R Out, 30dB gain 1kHz (DC to 22kHz)  0.0025% 
Line in to Mix L/R out 0dB gain +10dBu 1kHz (DC to 22kHz)  0.002% 
Stereo in to Mix L/R out 0dB gain +10dBu 1kHz (DC to 22kHz)  0.002% 
Mic in to Mix L/R Out, 50dB gain 1kHz (DC to 22kHz)  0.0035% 
Mic in to Mix L/R Out, 30dB gain 10kHz (DC to 30kHz)  0.0025% 
GS-R24 SPECIFICATIONS