USER GUIDE Publication AP7784
Limited One Year Manufacturers Warranty This product is warranted to be free from defects in materials or workmanship for period of one year from the date of purchase by the original owner. To ensure a high level of performance and reliability for which this equipment has been designed and manufactured, read this User Guide before operating. In the event of a failure, notify and return the defective unit to the place of purchase.
PACKED ITEMS Check that you have received the following: 0 20 30 0 20 40 GAIN 30 0 20 40 GAIN 50 30 0 20 40 GAIN 50 30 0 20 40 GAIN 50 30 0 20 40 GAIN 50 30 0 20 40 GAIN 50 30 0 20 40 GAIN 50 30 0 20 40 GAIN 50 30 0 20 40 GAIN 50 30 0 20 40 GAIN 50 30 30 0 20 40 GAIN 50 0 20 40 GAIN 50 30 0 20 40 GAIN 50 30 0 20 40 GAIN 50 30 0 20 40 GAIN 50 30 ST1 -10 LEV 40 GAIN 50 ST3 -5 6 60 40 -14 +48V HPF POL 100Hz HF 6 60 40
CONTENTS Thank you for purchasing your Allen & Heath GS-R24. To ensure that you get the maximum benefit from the unit please spare a few minutes familiarizing yourself with the controls and setup procedures outlined in this user guide. For further information please refer to the additional information available on our web site, or contact our technical support team. http://www.allen-heath.com This User Guide does not cover the interface modules available for the GS-R24.
INTRODUCTION TO THE GS-R24 A Technical Overview: The Allen & Heath GS-R24 mixer has been carefully and lovingly designed in the beautiful county of Cornwall in the UK and is manufactured alongside a wide range of professional audio mixing consoles. Allen & Heath has a long history of making classic recording mixers such as the Sigma, Syncon, System 8, Saber and the GS3000, but for a few years have concentrated on the live sound, installation and pro DJ markets.
613mm (24.1”) DIMENSIONS & WEIGHTS 192mm (7.5”) 1125mm (44.3”) 97 .0 0° 616mm (24.
GS-R24 SPECIFICATIONS 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) Va
GS-R24 SPECIFICATIONS Noise Mono ch Mic Pre EIN @ 60dB gain 150R input Z 22-22kHz -128.
BLOCK DIAGRAM MIC IN LINE IN +48V L R Line Invert GAIN GAIN Invert GAIN + - GAIN + - 100Hz HPF A LF RECORDING INTERFACE LM f q DAC g g HF POST-EQ HM f q 4 BAND PARAMETRIC EQUALISER g HF EQ IN C CHANNEL METER POST-EQ PRE-MUTE FADER OUTPUT POSTFADER PRE-MUTE PRE FADER MONO CHANNEL METER D FADER BYPASS + POST FADER MONO FADER MIDI DATA TO MIDI CPU CONTROL SOLO LOGIC LOGIC CONTROL PRE + FADER SOLO/SELECT SOFT MUTE MUTE AUX 5-6 PRE/POST SELECT SOLO/SELECT SO
MONO INPUT CHANNEL CT REAR PANEL CONNECTIONS DIRECT OUT RT Direct Output Jack Socket Standard 1/4” (6.25mm) Jack socket for Channel output signal. Wired Tip=Hot(+), Ring=Cold(0V), Sleeve=Chassis. Nominal level is 0dBu. The source for the Direct Output is selectable by option jumpers internally, factory set to Pre-Fade. Insert Jack Socket INSERT Standard 1/4” (6.25mm) Jack socket for unbalanced insert send and return signals. Wired Tip=send, Ring=return, Sleeve=Chassis. Nominal level is 0dBu.
MONO INPUT CHANNEL 0 20 Pre-Amp performance notes 30 GAIN -14 The GS-R24 pre-amp is a highly developed and proven design. Originally evolved from a balanced summing amplifier circuit originally designed back in the late 1980s for the Focusrite Forte console whilst working for industry legend Rupert Neve. Very low noise transistors are employed in a symmetrical topology with local phase compensation resulting in an inherently stable but wide bandwidth, low distortion, very low noise design.
MONO INPUT CHANNEL LMF EQ HF The LMF (Low Mid Frequency) equaliser affects the lower middle of the audible frequency range. The frequency graduations on the sweep control are the centre frequencies of the EQ. As with the HMF section, the Q factor is variable from 0.8 to 6. The graph shows the Q setting in the minimum, and maximum positions, and the extents of the frequency range. 12k -15 1 +15 Q dBr 20.00 0.8 2k 1k F 6 15.00 4k 700 HM 10.00 6k 5.00 0.00 18k 400Hz -5.00 -10.00 G -15.
MONO INPUT CHANNEL Auxiliary sends 1 & 2 AUX Each of these controls sends a signal to an Aux bus. The signal is sourced prefade which means that the level is independent of, and unaffected by the fader. Auxes 1 & 2 are primarily used for foldback monitoring purposes, as the fader does not affect the level. These sends are affected by the Mute switch by default, so muting the channel will also mute the Aux sends but they can be selected to be independent of the mute status.
MONO INPUT CHANNEL A B C DAW INTERFACE CONFIGURATION SWITCHES DAW send source switch D A MUTE SOLO/ SELECT Switch A determines the source for the interface send for each channel. In the up position the source is just after the pre-amp and Hi pass filter. If pressed in, then the source is from after the EQ IN switch. One or the other signal will always be sent to the interface.
STEREO INPUT CHANNEL REAR PANEL CONNECTIONS ST1 IN ST1 (& ST3) Phono sockets Standard RCA phono sockets for unbalanced stereo inputs. Nominal level = 0dBu L R L/M ST2 IN ST2 (& ST4) Jack sockets Standard 1/4” (6.25mm) Jack socket for balanced or unbalanced line level signals. Wired Tip=Hot(+), Ring=cold (-), Sleeve=Chassis. The left channel input is connected to the break contacts of the right channel input socket so a mono source can feed both left & right channels if required.
STEREO INPUT CHANNEL SIP SAFE ST2 -10 LEV -5 With a 3dB corner frequency of 12kHz and maximum cut & boost of 15dB, the HF EQ is tuned to the upper range of the audio spectrum. dBr 20.00 0 -20 Stereo HF EQ 15.00 5 -30 OO 10 10.00 5.00 0.00 -5.00 HF -10.00 -15.00 12k -20.00 10.00 Hz -15 100.00 1000.00 10000.00 40000.00 +15 Stereo HM & LM EQ HM Fixed bandpass equaliser sections set at 2.5kHz and 250Hz and with a maximum cut & boost of 15dB. 2k5 -15 +15 LM dBr 20.00 15.00 10.
STEREO INPUT CHANNEL Auxiliary sends 1 & 2 EQ IN Each of these controls sends a signal to an Aux bus. The signal is sourced prefade which means that the level is independent of, and unaffected by the fader. Auxes 1 & 2 are mono buses so the stereo pre-fade signals are summed together to provide the source for the send.
STEREO INPUT CHANNEL SEND= POST EQ DAW I/P=DAW MUTE INTERFACE CONFIGURATION SWITCHES DAW send source switch This switch determines the source for the interface send for the stereo channel. In the up position the source is taken from the post-level input signals. If the switch is pressed then the source is taken from after the stereo EQ. One or the other signal will always be sent to the interface.
VALVE INPUT CHANNEL REAR PANEL CONNECTIONS T DIRECT OUT T INSERT Direct Output Jack Socket Standard 1/4” (6.25mm) Jack socket for Valve channel output signal. Wired Tip=Hot(+), Ring=Cold(0V), Sleeve=Chassis. Nominal level is 0dBu. The source for the Direct Output is taken from pre the master level control and is impedance balanced which means that the source resistance to the Tip(+) and Ring(0v) contacts are matched in order to maintain common-mode interference rejection.
VALVE INPUT CHANNEL 0 20 30 Gain Control 40 GAIN -14 This adjusts the gain of the input amplifier to match the signal level of the input. The gain is varied from +6dB to +60dB for signals plugged in to the xlr socket (Mic Input) and –14dB to +40dB for signals plugged into the Line/Inst input jack (without Boost being pressed). The Gain control does not affect the signal if the input is sourced from the DAW interface.
AUXILIARY MASTER OUTPUTS & CONTROLS REAR PANEL CONNECTIONS AUX 6 AUX 5 2TRK2 0UT AUX 4 AUX 3 AUX 2 AUX 1 2TRK2 IN Aux bus Output Jack Socket Standard 1/4” (6.25mm) Jack sockets for Aux bus output signals. Wired Tip=Hot(+), Ring=Cold(0V), Sleeve=Chassis. Nominal level is 0dBu.
GROUP BUS OUTPUTS & MASTER CONTROLS. GRP 4 OUT GRP 3 OUT GRP 2 OUT REAR PANEL CONNECTIONS GRP 1 OUT Group bus Output Jack Socket INSERT INSERT INSERT Standard 1/4” (6.25mm) Jack sockets for Aux bus output signals. Wired Tip=Hot(+), Ring=Cold(-), Sleeve=Chassis. Nominal level is +4dBu. Electronically balanced. INSERT Insert Jack Socket Standard 1/4” (6.25mm) Jack socket for unbalanced insert send and return signals. Wired Tip=send, Ring=return, Sleeve=Chassis. Nominal level is –2dBu. Serial No.
STUDIO OUTPUTS (ARTISTS FEEDS) STUDIO OUT 2 REAR PANEL CONNECTIONS STUDIO OUT 1 L L R R Studio feed Output Jack Socket Standard 1/4” (6.25mm) Jack sockets for Studio artists feed output signals. Wired Tip=Hot(+), Ring=Cold(0V), Sleeve=Chassis. Nominal level is 0dBu. Each Studio Output pair can be used as a stereo feed or two mono outputs.
MAIN & MONITOR OUTPUTS & 2-TRACK INPUTS REAR PANEL CONNECTIONS R CRM/FRONT L MONO OUT AUX MAIN OUT (2 Track 1) INSERT L L 2TRK1 IN 6 AUX 5 L 2TRK2 0UT R ALT/REAR CENTRE L SUB MONO INSERT INSERT R PHONES R 2TRK1 IN 2TRK2 IN L L R R R ALLEN&HEATH 2TRACK 2 IN/OUT Phono sockets Standard RCA phono sockets for unbalanced stereo (2Track) inputs and outputs. Nominal level = 0dBu 2TRACK 1 input jack sockets Standard 1/4” (6.
MASTER SECTION AL +16 +9 +6 +3 0 -3 -6 -9 -12 -16 -20 -30 Illuminates when the PFL or AFL system is activated by pressing a channel solo switch in PFL or AFL mode, or any AFL switch in the master section. The meters will show the signal level from selected sources. 2 Track Dubbing switches R PFL/AFL ACTIVE These allow easy copying from one 2 Track recording machine to another without unplugging the equipment from the console.
MONITORING MODES PFL MODE switch In PFL mode (PFL MODE switch pressed, AFL MODE not pressed), pressing an input channel Solo switch will send a pre-fade (pre-mute) signal to the PFL bus and trigger the PFL monitoring in the master section. This will override any AFL monitoring from the master section AFL switches.
17-24=AUX/GRP & 5.1 SURROUND SWITCHES 17-24=AUX+GRP This recessed switch swaps the interface sends on channels 17-24 from the mono input channels to the Aux 1-4 outputs and the four group outputs. Useful when it is required to send groups of channels to a DAW for recording or processing. 17-24=AUX+GRP 5.1 Surround monitor switch Another recessed switch (to prevent accidental operation). This switch enables 6 channels from the interface return (25-30) to be used for 5.1 surround mix monitoring from a DAW.
METERBRIDGE PEAK +16 +9 +6 +3 0 -3 -6 -9 -12 -16 -20 -30 +16 +9 +6 +3 0 -3 -6 -9 -12 -16 -20 -30 +16 +9 +6 +3 0 -3 -6 -9 -12 -16 -20 -30 +16 +9 +6 +3 0 -3 -6 -9 -12 -16 -20 -30 +16 +9 +6 +3 0 -3 -6 -9 -12 -16 -20 -30 +16 +9 +6 +3 0 -3 -6 -9 -12 -16 -20 -30 +16 +9 +6 +3 0 -3 -6 -9 -12 -16 -20 -30 +16 +9 +6 +3 0 -3 -6 -9 -12 -16 -20 -30 +16 +9 +6 +3 0 -3 -6 -9 -12 -16 -20 -30 +16 +9 +6 +3 0 -3 -6 -9 -12 -16 -20 -30 +16 +9 +6 +3 0 -3 -6 -9 -12 -16 -20 -30 +16 +9 +6 +3 0 -3 -6 -9 -12 -16 -20 -30 +16
MIDI CONTROL MODES OF OPERATION SOLO/SELECT switches in SEL mode If the Solo mode is set to SEL (both PFL and AFL mode switches set to their up position, then the channel Solo switches function as MIDI select switches primarily designed to map to DAW functions such as track solo, track mute or record arm. Pressing the switch will send a MIDI message via the MIDI out on the interface module which can either be mapped, learned or translated by the DAW or computer software.
MIDI CONTROLLERS MIDI 127 1 MIDI 2 127 60mm MIDI faders Two 60mm faders are provided for assigning to parameters in your DAW that can be controlled by MIDI. They are permanently enabled so will send MIDI data via the MIDI output on the interface module whenever they are moved. Rotary MIDI controls Twelve rotary MIDI potentiometers are provided to control rotary type parameters in your DAW such as track Pans, Send levels or processing controls.
MIDI IMPLEMENTATION MIDI Implementation There are two implementation modes for GS-R24: 1) The default set of MIDI data messages that is unique to GS-R24 which can be mapped, learned or translated by DAW application software or MIDI translator software. 2) An emulation of the US 2400 MIDI control surface made by TASCAM.
MIDI IMPLEMENTATION MIDI Default data: ch = MIDI channel MIDI CONTROLLER MESSAGE TYPE DATA 1 DATA 2 ON/OFF SHIFT 0x9(ch) 0x6C 0x7F ON SHIFT 0x8(ch) 0x6C 0x00 OFF BUTTON 1 0x9(ch) 0x6D 0x7F ON BUTTON 1 0x8(ch) 0x6D 0x00 OFF BUTTON 2 0x9(ch) 0x6E 0x7F ON BUTTON 2 0x8(ch) 0x6E 0x00 OFF BUTTON 3 0x9(ch) 0x6F 0x7F ON BUTTON 3 0x8(ch) 0x6F 0x00 OFF BUTTON 4 0x9(ch) 0x70 0x7F ON BUTTON 4 0x8(ch) 0x70 0x00 OFF BUTTON 5 0x9(ch) 0x71 0x7F ON BUTTON 5 0x8(
MIDI IMPLEMENTATION MIDI Default data: ch = MIDI channel MIDI CONTROLLER MESSAGE TYPE DATA 1 DATA 2 ON/OFF SHIFT DATA 1 SEL 1 0x9(ch) 0x01 0x7F ON 0x23 SEL 1 0x8(ch) 0x01 0x00 OFF SEL 2 0x9(ch) 0x02 0x7F SEL 2 0x8(ch) 0x02 SEL 3 0x9(ch) SEL 3 MESSAGE TYPE DATA 1 DATA 2 ON/OFF SHIFT DATA 1 SEL 13 0x9(ch) 0x0D 0x7F ON 0x2F 0x23 SEL 13 0x8(ch) 0x0D 0x00 OFF 0x2F ON 0x24 SEL 14 0x9(ch) 0x0E 0x7F ON 0x30 0x00 OFF 0x24 SEL 14 0x8(ch) 0x0E 0x00 OFF 0x30
POWER-UP CONFIGURATION MODES MIDI Operation modes It is possible to set GS-R24 to work in different ways depending on preference and the capability of externally connected equipment. These modes are primarily concerned with setting up the illumination of the Solo Select switch LEDs so that they tally entirely from the console function or from external MIDI messages received by the console.
CONNECTION DIAGRAM (BASIC) MICROPHONE SIGNAL KEY: FROM DIRECT BOX LINE LEVEL SIGNALS FROM INSTRUMENT PICKUP EFFECTS RETURN EFFECTS SEND ARTISTS STUDIO MONITOR SIGNALS (LINE LEVEL) MAIN CRM SIGNALS (LINE LEVEL) ALTERNATE SPEAKER SIGNALS (LINE LEVEL) KT-88 Amp M24 DIRECT OUT DIRECT OUT DIRECT OUT DIRECT OUT DIRECT OUT DIRECT OUT R R CRM/FRONT ALT/REAR CENTRE SUB L L MONO OUT MONO INSERT PHONES L R MAIN OUT (2 Track 1) INSERT INSERT L R 2TRK1 IN 2TRK1 IN L R ALLEN&HEATH AUX
MONO CHANNEL WORKFLOW ROUTING OPTIONS 1) RECORDING DIRECT FROM THE PRE-AMP, DIRECT MONITORING/MIXING GS-R24 MONO INPUT CHANNEL PATH PREAMP INSERT EQ FADER MIX NONE PRESSED A I DIGITAL AUDIO WORKSTATION O B C DAW D 2) RECORDING DIRECT FROM THE EQ, DIRECT MONITORING/MIXING GS-R24 MONO INPUT CHANNEL PATH PREAMP INSERT EQ FADER MIX A PRESSED A I DIGITAL AUDIO WORKSTATION O B C DAW D 3) INSERT PROCESSING BY DAW, OR DIRECT RECORDING WITH EQ ON MONITOR PATH GS-R24 MONO INPUT CHANNEL PATH PR
MONO CHANNEL WORKFLOW ROUTING OPTIONS 4) RECORDING DIRECT FROM THE EQ, DAW TRACK MONITORING/MIXING GS-R24 MONO INPUT CHANNEL PATH PREAMP INSERT EQ FADER MIX A&C PRESSED A I DIGITAL AUDIO WORKSTATION O C DAW B D 5) MIXING IN DAW USING FADER AS CONTROLLER, MONITOR VIA BYPASSED FADER GS-R24 MONO INPUT CHANNEL PATH PREAMP INSERT EQ FADER MIX MIDI C&D PRESSED A I DIGITAL AUDIO WORKSTATION O B C DAW D 6) ANALOGUE SUMMING MIXDOWN FROM DAW TRACK USING AUTOMATED FADES GS-R24 MONO INPUT CHANNEL
MONO CHANNEL WORKFLOW ROUTING OPTIONS 7) OVER-DUBBING/RECORDING DIRECT FROM PRE-AMP, MONITORING DAW TRACK OUTPUT GS-R24 MONO INPUT CHANNEL PATH PREAMP INSERT EQ FADER MIX C PRESSED A I DIGITAL AUDIO WORKSTATION O C DAW B D 8) USING ANALOGUE INSERT & EQ ON A DIGITAL TRACK (FEEDBACK LOOP POSSIBLE!) GS-R24 MONO INPUT CHANNEL PATH PREAMP INSERT EQ FADER MIX A&B PRESSED A I Allen & Heath DIGITAL AUDIO WORKSTATION 39 O B C DAW D GS_R24 User Guide
INTERNALLY OPTION SET OPTION LINK DETAILS JUMPER LINKS Mono Input channel option links. AUX OPTIONS DIRECT OUT SOURCE POST EQ (BEFORE CONFIG SW C) PREFADE AUX SOURCE = PRE MUTE POST EQ (AFTER CONFIG SW C) PREFADE AUX SOURCE = POST MUTE POST FADER (CANNOT BE BYPASSED) AUX 5&6 SOURCE = PRE FADER POST FADER (CAN BE BYPASSED) AUX 5&6 SOURCE = POST FADER Stereo Input channel option links.
WIRING NOTES PROCESSOR Insert cable wiring RETURN S INSERT T OUT T R S R SEND GROUND RETURN SEND S T R IN LINK RING TO SLEEVE TO UNBALANCE Y-Adapter Y-Adapter 2 Outputs to 1 Input RCA PHONO CABLE RCA phono jacks adapter 1 Output to 2 Inputs UNBALANCED No ! UNBALANCED INSTRUMENT CABLE UNBALANCED BALANCED TRS JACK CABLE BALANCED Sleeve=ground Sleeve=ground Ring=cold (-) Ring=cold (-) Tip=hot (+) TO INPUT Tip=hot (+) 2=hot (+) 1=ground BALANCED MIC CABLE BALANCED 1=ground
PRODUCT SUPPORT Investigate ALLEN & HEATH’s other ranges at www.allen-heath.com Large Live Sound mixers — iLive digital, and GL Series Small Format Live Sound mixers — ZED, MixWizards and PA Series DJ products — Xone Series Sound Management, Broadcast and Recording — iDR, XB and ZED-R Series Registering your product Thank you for buying the Allen & Heath GS-R24 mixer. We hope that you are happy with it and that you enjoy many years of faithful service with it, and record and mix some great music.
