Allen & Heath GL2400-24 manual

ALLEN & HEATH USER GUIDE Publication AP5597 GL2400[...]

2 GL2400 User Guide This product complies with the European Electromagnetic Compatibi lity directives 89/336/EEC & 92/ 31/EEC and the European Low Voltage Directives 73/23/EEC & 93/68/EEC. This product has been tested to EN55 103 Parts 1 & 2 1996 for use in Environments E1, E2, E3, and E4 to demonstrate compliance with the protection re[...]

GL2400 User Guide 3 Important Safety Instructio ns WARNINGS - Read the following before proceeding : ATTENTION: RISQUE DE CH OC ELECTRIQUE – NE PA S OUVRIR Read instructions: Read and retain these s afety and operating instructions for future reference. Adhere to all warnings printed here a nd on the console. Follow the operating instructions pri[...]

4 GL2400 User Guide General Precautions Damage To prevent damage to the controls and cosmetics avoid placing heavy objects on the control surface, scratching the surface with sharp objects, or rough handling a nd vibration. Environment Protect from excessive dirt, dust, heat and vibration when operating and storing. Avoid tobacco ash, smoke, drinks[...]

GL2400 User Guide 5 Introduction Welcome to the Allen & Heath GL2400 , the latest generation of the popular GL series of dual function live sound mixing consoles. We have tried to keep this user guide brief and to the point. Please read it fully before starting. Included is information on installi ng, connecting and operating the console, panel[...]

6 GL2400 User Guide PRE AUX AUX 4 3 AUX AUX 2 1 O O +6 POST O O +6 O O +6 O O +6 -15 LF -15 +15 +15 180 45 LM 35Hz 70 -15 400 1k 250 +15 3k HM 700 500Hz -15 1k 6k 15k 4k +15 HF GAIN 20 0 50 40 +48V 30 6 AUX AUX 5 MUTE +6 O O PRE POST O O +6 EQ IN POLARITY PRE AUX AUX 4 3 AUX AUX 2 1 O O +6 POST O O +6 O O +6 O O +6 -15 LF -15 +15 +15 180 45 LM 35Hz[...]

GL2400 User Guide 7 The Range: GL2400-16 14 mono mic/line, 2 mic/dual stereo GL2400-24 22 mono mic/line, 2 mic/dual stereo GL2400-32 30 mono mic/line, 2 mic/dual stereo GL2400-40 38 mono mic/line, 2 mic/dual stereo RPS11 External power supply for the GL2400-40 MPS12 Backup power supply for the 16,24,32 frame sizes GL2400-SLV2 Sys-Link V2 console i [...]

8 GL2400 User Guide Introducing the Allen & Heath GL2400 The GL2 400 is a 4-bus dual function analogue mi xing console desig ned for professional audio applications. W hether mixing FOH, monitors or both, recording live or in the studio, installed in a busy venue, out on the road touring, or earning its k eep in rental stock, the GL2400 provide[...]

GL2400 User Guide 9 Here are just a few key points we considered when specifying the GL2400 : Affordability We understand your need to work within a realistic budget and know you w a n t t o g e t t h e v e r y b e s t r e t u r n f o r y o u r i n v e s t m e n t . W e k n o w t o o t h a t e v e n t h e l o w e s t budget shows put the same tough[...]

10 GL2400 User Guide Inst alling the Console The GL2400 has a sp ace saving, compact chassis design. This is convenient both in saving seats for the paying a udience in a busy venue, and in reducing t he size, complexity and weight of flight ca sing for on-the-road use. The co ntrol surface has a 10 degree slope for optimum visibility during operat[...]

GL2400 User Guide 11 Connecting Power Read and understand the Important Safety Instructions printed at the start of this guide, and the warnings printed on the rear of the co nsole. Check that the console power supply mains voltage input is the same as your loca l supply. Check that the correct mains lead with moulded plug has been provided with yo[...]

12 GL2400 User Guide 3 1+3 = 12V LAMP XLR male socket XLR female socket PIN 2 = HOT Sleeve=ground Ring=return Tip=send UNBALANCED INSERT INPUT / OUTPUT 13 GRP 4+ 12 AUX 1+ 11 AUX 2+ 10 AUX 3+ 9 AUX 4+ 8 AUX 5+ 7 AUX 6+ 6 PFL+ 5 AFL+ 4 nc 3 PFL DC 2 AFL DC 1 0V (PAFL) GRP 4- 32 AUX 1- 31 AUX 2- 30 AUX 3- 29 AUX 4- 28 AUX 5- 27 AUX 6- 26 PFL- 25 AFL-[...]

GL2400 User Guide 13 Audio Connections The GL2400 uses professional grade 3 pin XLR and 1/4" TRS (3 pole) jack sock ets. To ensure best performance, we recommend that you use high quality audio cables and connectors, and take time to check for reliab le and accurate cable assembly. It is well known that most audio syste m problems are due to f[...]

14 GL2400 User Guide The Console Connectors MONO CHANNEL MIC / LINE IN The LI NE (PAD) switch selects either the MIC XLR or the LINE TRS ja ck as the input source. The XLR is normalled through the TRS jack so that it can be used for microphone or line level sign als when nothing is plugged into the jack socket . This gives the channel preamp a mass[...]

GL2400 User Guide 15 GROUP, L, R, M OUT The main console mix o utputs are on electronically balanced XLR. Thes e produce the professional standard +4dBu when the meters read ‘0’, and provid e up to a maximum +25dBu. The L and R outputs typically feed the house PA system in liv e sound mixing, or a 2-track recorder in studio mixing. In monitor m[...]

16 GL2400 User Guide The MONO Input Channel +48V Switches +48VDC to the ch annel input XLR for powering microphones or DI boxes that need phantom power. The power is current limited through 6k8 ohm resistors t o pins 2 and 3. WARNING: Do not connect unbal anced sources or cables to inputs with phantom power selected. To avoid loud clicks always mut[...]

GL2400 User Guide 17 AUX SENDS T h e s e r o t a r y c o n t r o l s a d j u s t h o w m u c h c h a n n e l signal is mixed to the aux outputs. Each of the 6 auxes has its own control. They adjusts from fully off to +6dB boost. Unity gain 0dB is marked at 3 o’clock position. Auxes 1-4, 5-6 are sw itched pre/post. The settings may be changed if p[...]

18 GL2400 User Guide The STEREO Input Channel Each GL2400 stereo channel features a mono microphone pream p as well as two stereo line inputs. These t hree sources can be used independently or mixed together into the channel, so providing a unique flexibility. For example, you could configure a conventional mono microphone channel with the tw o ‘[...]

GL2400 User Guide 19 The GROUP / AUX Masters AUX MASTERS Each aux mix has a master level control that adjusts the output level to match external equipment, or trims the monitor, effect or other send without affecting the mix balance. Up to +10dB boost is available above the normal 0dB position. Note that this becomes the group or master in monitor [...]

20 GL2400 User Guide The AUX 5-6, L-R-M Masters AUX 5 and 6 Masters These function in the same way as described for auxes 1 to 4. In monitor mode , the recessed REV switch r e v e r s e s t h e A U X 5 m a s t e r w i t h L , a n d A U X 6 w i t h R . H e r e t h e a u x signals are presented to the L and R XLR outputs complete with their inserts. [...]

GL2400 User Guide 21 7x4 MA TRIX The matrix adds to the powerful multi-tasking capability of the GL2400 . It provides a se t of 4 additional console outputs. It is a ‘mixer within a mixer’ creating its output fro m any combination of the groups, main LR mix and external input. I t can be used to provide duplicate main outputs or to create new m[...]

22 GL2400 User Guide MONITOR, T ALKBACK and SIGNAL GENERA TOR Console Monit or Comprehensive engineer’s headphones and local monitoring is provided. Select either LR or 2-track return as the default source using the L-R / 2TRK switch. Pressing PFL or AFL elsewhere on the console automatically overrides the current monitor source with the signal f[...]

GL2400 User Guide 23 GL2 400 Applications and Operating Tip s The following is a collection of brief descriptions , application notes, hints and tips to help the operator underst and some of the technical terms referred to, and to get the most out of the uniq uely capable GL2400 live sound mixing console. The y are written as a concise reference to[...]

24 GL2400 User Guide Using the Oscillator / Noise Gene rator T h e GL2400 includes a useful sig nal generator able to pr oduce a pure 1kHz sin e wave tone, or a pink noise test source. This is invaluable in testing the system components and setting up correct gain structure. The generator can be routed independently to the various console outputs. [...]

GL2400 User Guide 25 Using PFL / AFL Allen & Heath are renowned for b ringing you the most comprehensive engineer’s monitoring system i n consoles at this price point. We recognise the importance of correct gain structure and signal handling. The GL2400 includes LED meters for every input channel and main output, as well as a pair of high res[...]

26 GL2400 User Guide Polarity R e f e r s t o t h e p o s i t i v e ( + ) a n d n e g a t i v e ( - ) w i r e s o f a loudspeaker or balanced audio connection. The console input channels include POLARITY switches which reverse the + and – input connections. Some applications include correcting for reverse wired cables, correcting for microphone p[...]

GL2400 User Guide 27 Dual Functionality Now an industry standard, Allen & He ath pioneered thi s feature with the introduction of the first GL consoles in the ‘90s. In the past it wa s necessary to stock two different types of li ve sound console, one for mixing FO H (front-of-house), the other designed for mixing o n-stage monitors. With the[...]

28 GL2400 User Guide Applications for the Matrix The matrix is a ‘mixer within a mixer’, a versatile toolbox of output s you can use t o satisfy a host of applications. Each of the 4 output s is mixed from any combination of the groups, L, R and an external input a s dialled up on the 7 source rotaries (hence a ‘7x4’ matrix). Its master lev[...]

GL2400 User Guide 29 Create IEM Mixes with Ambience I n M o n i t o r mode the matrix continues to be fed with the 4 groups, L and R mixes. You can use these to create ad ditional, independent monitor mixe s. Together with the auxes these give you as ma ny as 10 mixes. Create mono or stereo in-ear monitor feeds using single or paired matrices, for [...]

30 GL2400 User Guide Aux-Fed Subs Driving the PA syste m sub bass speakers with their own mix has two main advantages. First , the mix is much cleaner because only sources that generate the low frequencies, for example kick drum, bass guitar and keyboards, ar e sent to the subs. Low frequency bleed from these sources into open microphones such as v[...]

GL2400 User Guide 31 Using the channel Direct Outputs Default factory setting is pre-insert, pre-EQ, pre-fade so that your live fader mixing, effects and EQ do not affect the recording. Change th is to post-EQ using inter nal jumpers if you prefer to use the EQ for source correction affecting the recording too. You could also patch DIR OUT into a m[...]

32 GL2400 User Guide S pecifications Performance Maximum input level Mic +34dBu (inc pad) CH Line +34dBu Other Line +20dBu Maximum output level XLR +26dBu Jack +20dBu Internal headroom Channels +20dB M i x + 2 2 d B Meters 3 colour LED, quasi peak res ponse Sensitivity 0VU = +4dBu at XLR output Master meters 12 segment -30 to +16dB Channel meters 4[...]

GL2400 User Guide 33 Connections Mono channel XLR balanced pin 2 hot Sensitivity -60 to +14dBu TRS balanced, tip hot Sensitivity -40 to +14dBu P a d o u t ( M I C ) 2 k o h m Pad i n (MIC or LINE) >10k ohm, -20dB attenuation Max input level +34dBu XLR phantom power +48V, on/off Stereo channel ST1,3 TRS unbalanced >10k ohm, -16 to +20dBu ST2,4[...]

34 GL2400 User Guide METER 0dBu MATRIX EXT IN EXT IN MIC/STEREO INPUTS GAIN R L/M INPUT ST1(3) CH LR + + R - + GAIN - L/M INPUT ST2(4) 48V GAIN - + 2= + MIC PHANTOM POWER LR CH 1-2 L-R FADER PAN PFL MUTE + 4 BAND EQ UALI SER EQ IN LM HM HF SUM 3-4 6 5 4 3 2 LF 1 AUX 0dBu MIC OUT RING= - TIP= + (break j ack) POL MIC/MONO INPUTS 48V HPF LINE/PAD -20d[...]

GL2400 User Guide 35 User Options The GL2400 has a versatile archite cture which should sat isfy most applications you may encounter without modificatio n. However, the following internal options provide alternative settin gs for those applications that ma y demand them. Access is required to the int ernal assemblies. For use r convenience, pluggab[...]

36 GL2400 User Guide Aux pre/post EQ Factory default for the mono channel pre-fade auxes is pre-insert, pre-EQ. This is popular with many users mixi ng monitors from FOH. It prevents the channel EQ and inserted compressors affecting the monitor mix. Move the jumper from A to B to change this to post-insert, post-EQ if preferred, for example when us[...]

GL2400 User Guide 37 Output bal ance options The aux and matrix outputs are impedance balanced as standard operating at nominal -2dBu and with +20dB u maximum drive. They prov ide similar interference rejection to electronically balanced outpu ts when connected to balanced equipment inp uts. An electronically balanced op tion is available if yo u r[...]

38 GL2400 User Guide Cue Sheet 1 of 3 GL2400 Master Section Copy and use this page to rec ord your console settings. 1234 L R M 20 30 0 5 0 5 10 10 0 20 30 0 5 0 5 10 10 0 20 30 0 5 0 5 10 10 0 20 30 0 5 0 5 10 10 0 20 30 0 5 0 5 10 10 AFL AFL OO LEVEL O O R OO L OO O LEVEL O MUTE +6 +6 MUTE O +6 O +6 O O +6 R +6 L O +6 O +6 2 3 GRP 4 OO GRP OO 1 G[...]

GL2400 User Guide 39 Cue Sheet 2 of 3 GL 2400 8 Mono Copy and use this page to rec ord your console settings. PRE AUX AUX 4 3 AUX AUX 2 1 O O +6 POST O O +6 O O +6 O O +6 -15 LF -15 +15 +15 180 45 LM 35Hz 70 -15 400 1k 250 +15 (PAD) 3k HM 700 500Hz -15 1k 6k 15k 4k +15 6 -14 HF GAIN 20 0 40 60 HPF 50 40 +48V LINE 30 6 AUX AUX 5 MUTE +6 O O PRE POST[...]

40 GL2400 User Guide Cue Sheet 3 of 3 GL2400 6 Mono, 2 Stereo Copy and use this page to rec ord your console settings. PRE AUX AUX 4 3 AUX AUX 2 1 O O +6 POST O O +6 O O +6 O O +6 -15 LF -15 +15 +15 180 45 LM 35Hz 70 -15 400 1k 250 +15 3k HM 700 500Hz -15 1k 6k 15k 4k +15 HF GAIN 20 0 50 40 +48V 30 6 AUX AUX 5 MUTE +6 O O PRE POST O O +6 EQ IN POLA[...]