Page 2 - GB4 User Guide; IMPORTANT
2 GB4 User Guide © Harman International Industries Ltd. 2004 All rights reserved Parts of the design of this product may be protected by worldwide patents. Part No. ZM0302-01 Issue: 1.1 Soundcraft is a trading division of Harman International Industries Ltd. Information in this manualis subject to c...
Page 3 - Contents; Introduction
3 GB4 User Guide Contents Contents Contents Contents Contents Introduction 5 Key Features 6 Warranty 7 Installation 9 SAFETY SYMBOL GUIDE 9 IMPORTANT SAFETY WARNINGS 10 Mains Installation 12 WORKING SAFELY WITH SOUND 14 Setting Up & Troubleshooting 14 Optional External Power Supply 16 Audio Conn...
Page 6 - Key Features
6 GB4 User Guide Key Features Thank you for buying the GB4 mixing console. its main features are: Individually switched 48V phantom power on every mono input module. 8 Aux sends. 4 Group sends (paired). 4 Mute Groups. 7+4 Output Matrix. Limiter on record output. New GB30 mic pre-amp. 4-band GB30 EQ....
Page 7 - Warranty
7 GB4 User Guide Warranty 1 Soundcraft is a trading division of Harman International Industries Ltd.End User means the person who first puts the equipment into regular operation.Dealer means the person other than Soundcraft (if any) from whom the End Userpurchased the Equipment, provided such a pers...
Page 9 - SAFETY SYMBOL GUIDE
9 GB4 User Guide Installa Installa Installa Installa Installation tion tion tion tion For your own safety and to avoid invalidation of the warranty please read this section carefully. SAFETY SYMBOL GUIDE For your own safety and to avoid invalidation of the warranty all text marked with these symbols...
Page 10 - IMPORTANT SAFETY WARNINGS; THIS UNIT MUST BE EARTHED; as marked on the rear panel.
10 GB4 User Guide IMPORTANT SAFETY WARNINGS THIS UNIT MUST BE EARTHED Under no circumstances should the mains earth be disconnected from the mains lead. The wires in the mains lead are coloured in accordance with the following code: Earth: Green and Yellow (Green/Yellow - US) Neutral: Blue (White - ...
Page 12 - Mains Installation
12 GB4 User Guide General Precautions Avoid storing or using the mixing console in conditions of excessive heat or cold, or in positions where it is likely to be subject tovibration, dust or moisture. Do not use any liquids to clean the fascia of the unit: a soft dry cloth is ideal. Avoid using the ...
Page 13 - Shielding
13 GB4 User Guide Initial Wiring Considerations For optimum performance, it is essential for the earthing system to be clean and noise free, as all signals are referenced to thisearth. A central point should be decided on for the main earth point system, and all earths should be 'star fed' from this...
Page 14 - WORKING SAFELY WITH SOUND
14 GB4 User Guide Points to Remember In all cases, use good quality twin screened audio cable. Check for instability at the output. Always connect both conductors at both ends, and ensure that the screen is only connected at one end. Do not disconnect the mains earth from each piece of equipment. Th...
Page 15 - Setting Up & Troubleshooting; Troubleshooting
15 GB4 User Guide Setting Up & Troubleshooting Initial set-up Once you have connected up your system (see the sections on connection and wiring earlier in this manual for guidance) you areready to set initial positions for the controls on your mixer. Set up individual input channel as follows: C...
Page 16 - Optional External Power Supply
16 GB4 User Guide Me Me Me Me Mettttter er er er ers no s no s no s no s not sho t sho t sho t sho t showing an wing an wing an wing an wing any signal y signal y signal y signal y signal Has the input gain been set correctly? (see above.) Is the source connected to the appropriate input socket for ...
Page 17 - Audio Connector Pinouts
Page 18 - Dimensions
Page 20 - Mono Input
20 GB4 User Guide Mono Input CHASS CHASS GND 2 3 1 CHASS +48v 10dB 60dB +15dB -15dB -15dB +15dB 13k 550 -15dB +15dB 1k9 80 -15dB +15dB HF HMID LMID LF PEAK DETECT EQ +16 +8 0 -10 AUX1 AUX2 AUX4 AUX3 AUX5_PST AUX5_PRE AUX6_PRE MIC 0dBu 0dBu GAIN +48 PEAK READING RECTIFIER CHASS GND LINE INSER T DIREC...
Page 21 - Stereo Input
21 GB4 User Guide Stereo Input 2 3 1 CHASS CHASS CHASS CHASS +48v LINE MIC +48 0dBu GAIN 10dB 60dB PUSH 2 3 1 LINE MIC 0dBu DETECT PEAK HMID -15dB +15dB HF -15dB -15dB LF +15dB +15dB LMID EQ 0dBu HF LMID HMID LF 0dBu LR MONO -15dB +15dB AUX8_PST AUX8_PRE AUX7_PST AUX7_PRE AUX6_PRE AUX6_PST AUX5_PST ...
Page 22 - Talkback and Stereo Returns
22 GB4 User Guide Talkback and Stereo Returns CHASS CHASS CHASS CHASS CHASS GROUPS AUX 1-2 AUX 3-4 AUX 5-6 AUX 7-8 PUSH 2 3 1 TA LKBACK LEVEL TB MIC STE RET 1 L R RET 1 LEVEL GRP1 BUS GRP2 BUS L M IX BUS R M IX BUS 1-2 L-R R STE RET 2 L R M IX BUS GRP4 BUS LEVEL RET 2 L M IX BUS GRP3 BUS L-R 3-4 OFF...
Page 24 - Master Section
24 GB4 User Guide CHASS GND CHASS GND GND GND GND C_OUT C MIX BUS INSERT FADER C MIX 3 1 2 MIX C MTX1 MTX2 MTX3 MTX4 M1 M2 M3 M4 READING RECTIFIER PEAK 12 SEGMENT LED METER PFLMTR C_OUT PFL EN 0dBu +10dB 0dBu 0dBu MASTER CENTRE CHASS CHASS GND GND CHASS CHASS GND CHASS L MIX BUS R_OUT R MIX BUS INSE...
Page 29 - MIC INPUT LEFT and RIGHT (3 pin female XLR)
29 GB4 User Guide Rear Connectors MIC INPUT LEFT and RIGHT (3 pin female XLR) Pin 1 GroundPin 2 Signal HotPin 3 Signal Cold LINE INPUT LEFT and RIGHT (1/4" TRS Jacks) Tip Signal Hot“ Ring Signal Cold“ Sleeve Ground“ MIC L MIC R L R LINE STE1
Page 31 - GROUPS; MATRIX MASTERS
31 GB4 User Guide Master Section GROUPS Note that the group controls are swappable with the aux 1-4 controls by pressing the GRP/AUXSWAP switches (1). If the contols are swapped the aux and group faders swap function (andtheir respective AFL buttons) and the group insert point becomes an aux insert ...
Page 32 - Master Mutes
32 GB4 User Guide L, R & C Outputs Each of the 3 main mix busses, Left, Right and Centre, has its own insert point. These arelocated on the rear connector panel. Each mix bus has its own Fader (16) following the insertpoint in the signal path. The post-fader signal for each bus is then routed to...
Page 33 - Stereo Returns; Rear Connector Panel
33 GB4 User Guide Talkback The talkback mic input is on the rear connector panel. The level of the talkback mic signal is controlled by the LEVEL pot (35). The signal is the fed toall groups, aux 1-2, aux 3-4, aux 5-6 and aux 7-8 using the appropriate buttons (36). Stereo Returns There are two stere...
Page 35 - Noise
35 GB4 User Guide TYPICAL SPECIFICA TYPICAL SPECIFICA TYPICAL SPECIFICA TYPICAL SPECIFICA TYPICAL SPECIFICATIONS TIONS TIONS TIONS TIONS Noise Measured RMS, 22Hz to 22kHz BandwidthMic E.I.N. @ unity gain,150 Ω source impedance -128dBu Mix Output, 40 inputs routed to mix <-82dBu Group Outputs <...
Page 37 - Mar
37 GB4 User Guide Mar Mar Mar Mar Mark-up Sheets k-up Sheets k-up Sheets k-up Sheets k-up Sheets