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GREAT SOUND MADE EASY
User Guide
Soundcraft
Harman International Industries Ltd
Cranborne House, Cranborne Road, Potters Bar, Herts, EN6 3JN, UK
TEL: +44 (0)1707 665000 FAX: +44 (0)1707 660742 EMAIL: info@soundcraft.com
Soundcraft USA
8500 Balboa Blvd., Northridge, CA 91329, USA
TEL: +1-818-920-3212 FAX: +1-818-920-3208 EMAIL: soundcraft-usa@harman.com
www.gigrac.com
Soundcraft reserves the right to improve or otherwise alter any information supplied in this document or any other documentation supplied hereafter. E&OE 11/03.
This equipment complies with the EMC Directive 89/336/EEC
#15713 GIGRAC User Guide Cover 17/11/03 3:03 pm Page 1
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  • Page 1

    #15713 GIGRAC User Guide Cover

    17/11/03 3:03 pm

    Page 1

    GREAT SOUND MADE EASY

    Soundcraft
    Harman International Industries Ltd
    Cranborne House, Cranborne Road, Potters Bar, Herts, EN6 3JN, UK
    TEL: +44 (0)1707 665000 FAX: +44 (0)1707 660742 EMAIL: info@soundcraft.com
    Soundcraft USA
    8500 Balboa Blvd., Northridge, CA 91329, USA
    TEL: +1-818-920-3212 FAX: +1-818-920-3208 EMAIL: soundcraft-usa@harman.com
    www.gigrac.com
    Soundcraft reserves the right to improve or otherwise alter any information supplied in this document or any other documentation supplied hereafter. E&OE 11/03.
    This equipment complies with the EMC Directive 89/336/EEC

    User Guide



  • Page 2

    IMPORTANT
    Please read this manual carefully before using
    your mixer for the first time.
    © Harman International Industries Ltd. 2003
    All rights reserved
    Parts of the design of this product may be protected by worldwide
    patents.
    Part No. ZM10107-01
    Issue: 1
    Soundcraft is a trading division of Harman International Industries Ltd.
    Information in this manual is subject to change without notice and does
    not represent a commitment on the part of the vendor. Soundcraft
    shall not be liable for any loss or damage whatsoever arising from the
    use of information or any error contained in this manual.
    No part of this manual may be reproduced, stored in a retrieval system,
    or transmitted, in any form or by any means, electronic, electrical,
    mechanical, optical, chemical, including photocopying and recording, for
    any purpose without the express written permission of Soundcraft.

    Harman International Industries Limited
    Cranborne House
    Cranborne Road
    POTTERS BAR
    Hertfordshire
    EN6 3JN
    UK
    Tel: +44 (0)1707 665000
    Fax: +44 (0)1707 660742
    http://www.soundcraft.com
    2



  • Page 3

    CONTENTS
    IMPORTANT SAFETY INSTRUCTIONS ........................ 4
    Introduction ............................................................ 7
    Quick Start Guide .................................................... 8
    A Note on Channel Use ........................................... 14
    Front and Rear Panels ............................................ 15
    Master Section GigRac 600.................................... 18
    Master Section GigRac 300.................................... 24
    Rear Panel GigRac 600 .......................................... 28
    Rear Panel GigRac 300 .......................................... 30
    Rackmounting Your GigRac ...................................... 32
    Connectors and Leads ............................................ 33
    Block Diagram GigRac 600 ..................................... 34
    Block Diagram GigRac 300 ..................................... 35
    Warranty .............................................................. 36
    Gigrac 300 / 600 Specifications .............................. 37
    Your Notes: ........................................................... 38

    NOTE: This equipment has been tested and found to comply with the
    limits for a Class A digital device, pursuant to Part 15 of the FCC Rules.
    These limits are designed to provide reasonable protection against
    harmful interference when the equipment is operated in a commercial
    environment. This equipment generates, uses, and can radiate radio
    frequency energy and, if not installed and used in accordance with the
    instruction manual, may cause harmful interference to radio
    communications. Operation of this equipment in a residential area is
    likely to cause harmful interference in which case the user will be required
    to correct the interference at his own expense.
    3



  • Page 4

    IMPOR
    TANT SAFETY INSTRUCTIONS
    IMPORT
    CAUTIONS


    To avoid the risk of fire, replace the mains fuse only with the correct
    type and value fuse, as marked on the rear of the product.



    ATTENTION: - Afin de réduire le risque de feu remplacer seulement avec
    fusible de même type.



    MAINS VOLTAGE SELECTION
    This setting is NOT User Adjustable.
    The units are capable of operating at either 230V AC or 115V AC
    mains voltages ±10%.



    REPLACING MAINS FUSE
    Remove the mains lead from the connector. Use a small screwdriver
    to unscrew the fuse carrier from its location to the left of the
    mains power connector. Check the fuse is of the correct type and
    value and replace if necessary; also check that the voltage rating
    as marked on the rear panel is correct for the mains supply level
    before switching the unit ON again.
    If the mains fuse fails repeatedly this may be because an electrical
    safety hazard exists. The unit must be taken out of service and
    referred to the Soundcraft dealer from where the equipment was
    purchased.



    THIS UNIT MUST BE EARTHED
    Under no circumstances should the mains earth be disconnected
    from the mains lead.



    ATTENTION: - Cet appareil doit être branché à la terre.

    The wires in the mains lead are coloured in accordance with the following
    code:
    UK & EU

    4

    US & CAN

    Earth / Ground:

    Green and Yellow Green and Yellow

    Neutral:

    Blue

    White

    Live:

    Brown

    Black



  • Page 5

    As the colours of the wires in the mains lead may not correspond
    with the coloured markings identifying the terminals in your plug,
    proceed as follows:
    The wire which is coloured Green and Yellow must be connected
    to the terminal in the plug which is marked with the letter E
    or by the earth / ground symbol:
    The wire which is coloured Blue or White must be connected
    to the terminal in the plug which is marked with the letter N.
    The wire which is coloured Brown or Black must be connected
    to the terminal in the plug which is marked with the letter L.
    Ensure that these colour codings are followed carefully in
    the event of the plug being changed.
    Replacement Part No: FJ8016 (UK) : FJ8017 (EU) : FJ8018 (US &
    CAN)


    Do not install near any heat sources such as radiators, heat
    resistors, stoves, or other apparatus (including amplifiers)
    that produce heat.



    Do not use this apparatus near water. The apparatus must
    not be exposed to dripping or splashing. Objects containing
    liquid must not be placed on the apparatus.



    The disconnect device is the mains plug or the appliance
    connector: either one must remain accessible so as to be
    readily operable in use.



    Do not defeat the safety purpose of the polarized or grounding
    type plug.
    A polarized plug has two blades with one wider than the other.
    A grounding type plug has two blades and a third grounding
    prong. The wide blade or the third prong are provided for your
    safety. When the provided plug does not fit into your outlet,
    consult an electrician for replacement of the obsolete outlet.



    Protect the power cord from being walked on or pinched
    particularly at plugs and convenience receptacles.



    Only use cables and hardware specified by the manufacturer.

    5



  • Page 6



    Unplug this apparatus during lightning storms or when unused
    for long periods of time.



    Refer all servicing to qualified service personnel. Servicing is
    required when the apparatus has been damaged in any way
    such as, the power-supply cord or plug is damaged, liquid has
    been spilled or objects have fallen into the apparatus, the
    apparatus has been exposed to rain or moisture, the
    apparatus does not operate normally or has been dropped.



    It is recommended that all maintenance and service on the
    product should be carried out by Soundcraft or its authorised
    agents. Soundcraft cannot accept any liability whatsoever
    for any loss or damage caused by service, maintenance or
    repair by unauthorised personnel.



    If a trolley is used, use caution when moving the trolley /
    apparatus combination to avoid injury from tip-over.

    WARNINGS

    6



    Read these instructions.



    Keep these instructions.



    Heed all warnings.



    Follow all instructions.



    This unit contains no user serviceable parts. Refer all servicing
    to a qualified service engineer, through the appropriate
    Soundcraft dealer.



    Clean the apparatus only with a dry cloth.



    DO NOT block any of the ventilation openings. DO NOT install
    where air cannot flow over the rear of the unit. DO Install in
    accordance with the manufacturers instructions.



  • Page 7

    Intr
    oduction
    Introduction
    Firstly we’d like to thank you for choosing the Soundcraft GigRac. We
    hope you have many happy years together!

    Features
    8 Microphone Inputs
    48V Phantom Power for condenser microphones (Inputs 1-4 only)
    PAD buttons for controlling loud input signals (Inputs 1-4 only)
    4 Stereo compatible inputs
    Treble and Bass controls
    Individual volume controls on each channel for Monitor level.
    Individual volume controls on each channel for Main level.
    Individual send controls for GiGFX on each channel
    7 Band Graphic Equaliser
    8 x Digital Effects (24 Bit/48 kHz)
    Record Output
    FX bypass switch
    FX bus output socket
    Submix input
    Amplifier ‘Clip’ warning light
    10 segment LED output level meter

    The GigRac case.
    Your GigRac is cased in a structural foam copolymer polypropylene resin,
    which gives an optimum combination of strength and impact resistance.
    This material also helps to keep the shell in good condition as it very
    resistant to dents and scratches.
    The nature of the moulding process leaves the irregular streaky surface
    finish that gives the GigRac its tough and unique look.

    Amplifier Power Ratings
    GigRac 300

    GigRac 600

    1 x 300W @ 4 Ohms

    2 x 300W @ 4 Ohms

    1 x 220W @ 8 Ohms

    2 x 220W @ 8 Ohms

    7



  • Page 8

    Quick Star
    Startt Guide
    If like most people you can’t wait to use your GigRac for the first time,
    then use the Quick Start Guide to get things started. The Quick Start
    Guide covers the following:

    1.

    Connecting up your loudspeakers to the GigRac

    2.

    Plugging in a vocal microphone

    3.

    Adding Treble or Bass to the signals

    4.

    Plugging in a guitar or stereo keyboard

    5.

    Apply one of the 8 GigFX digital effects to the signals

    Note: We recommend that you read through the entire
    GigRac user guide to familiarise yourself with all of the
    features on offer.

    8



  • Page 9

    9

    GigRac 600 shown.



  • Page 10

    1.

    Connecting up your loudspeakers to the GigRac

    Note: Make sure your GigRac is not powered up. This
    is very important to prevent any damage to either the
    GigRac or your loudspeakers!
    Using good quality speaker cables connect the loudspeakers to the
    Speaker outputs on the rear of the GigRac.
    If you have cables equipped with Neutrik Speakon connectors then use
    the Speakon connectors on the rear of the GigRac. Alternatively if you
    have cables equipped with jack plugs then use the jack sockets on the
    rear of the GigRac.

    Note: Because the GigRac 300 and GigRac 600 are
    mono mixers there is no difference between the signals
    sent to the Left or Right speakers i.e. both speakers
    will receive the same signal equally all of the time.
    Make sure that the Main Master Volume control (1) is turned fully down
    Now switch the GigRac on using the Power switch on the rear of the
    unit.

    2.

    Plugging in a vocal microphone

    Note: Before connecting a microphone to channels 1-4,
    make sure that the 48V phantom power switch is
    switched off (The red LED should not be illuminated)
    Connect the microphone cable to one of the first four inputs on the
    front of the GigRac.
    (The inputs on the GigRac can receive either 3-Pin XLR or standard Jack
    connectors.)

    10



  • Page 11

    Turn the Main Master Volume control (1) up to about half-way.
    Now gradually turn up the Main Volume control (2) on the microphone
    channel you have chosen to use. You should now hear the microphone
    signal appearing in the loudspeakers as you begin to speak.
    You should also be able to see activity on the Output Meter (4)

    Note: The XLR input on channels 1 - 4 is very sensitive.
    Depending on your microphone or your application, you
    may need to press the PAD button to prevent
    distortion occurring; don’t worry, this is perfectly
    normal.

    Note: Be careful not to point the microphone at the
    loudspeakers or you could accidentally create
    unpleasant feedback sounds.
    A note on Condenser Microphones
    If your microphone is a condenser microphone that requires phantom
    power you will need to switch on the 48V phantom power switch (3)
    located to the left of the Graphic Equaliser. Before doing this make sure
    that the Main Volume control (2) on the chosen channel is turned fully
    off to avoid causing an unpleasant sound that might damage your
    speakers.

    11



  • Page 12

    3.

    Adding Treble or Bass to the signal

    The GigRac offers simple Treble and Bass control for changing the tone
    of the signal.
    Treble (5)
    To add or remove some brightness or ‘sparkle’ to or from a signal, use
    the Treble control. In the center ‘click’ position (0) the Treble control
    has no effect. Turning it clockwise will boost the treble frequencies
    making the signal sound brighter. Turning it anti-clockwise will have the
    opposite effect by removing the treble frequencies and making the signal
    sound less bright.
    The Treble control is handy for adding some sparkle for example to an
    acoustic guitar, or for reducing the ‘s’ sound from sibilant vocals.
    Bass (6)
    To add some ‘bass thump’ to a signal or remove some ‘boominess’ or
    rumble, use the Bass control. In the center ‘click’ position (0) the Bass
    control has no effect. Turning it clockwise will boost the Bass frequencies
    making the signal sound punchier and more ‘bassy’. Turning it anticlockwise will have the opposite effect by removing the bass frequencies
    and making the signal sound less ‘boomy’.
    The Bass control is useful for making a bass drum sound punchier, or
    alternatively could be used for reducing explosive ‘b’ and ‘p’ sounds from
    a vocal signal.

    12



  • Page 13

    4. Plugging in an Acoustic Guitar, Stereo Keyboard or CD
    Player
    The GigRac will happily receive signals from instruments with either mono
    or stereo outputs such as guitars (Mono) or stereo keyboards and CD
    Players (Stereo)
    Before plugging in, make sure the Main Volume control (2) for the chosen
    channel is turned fully off to avoid accidental damage to your speakers.
    Acoustic Guitars
    Set the Main Master Volume control (1) to about halfway.
    Make sure the Main Volume control (2) on the channel you are about to
    use is turned fully down.
    Plug the guitar lead into the jack socket in the center of the combination
    input socket (7) on the channel of your choice. Turn up the volume
    control on your guitar to about halfway, and then gradually turn up the
    Main Volume control (2) until you hear the guitar signal appearing in the
    loudspeakers.You should also see activiity on the Main Ouptut meter
    (4).
    Stereo Keyboards and CD Players
    The GigRac offers four channels that can receive stereo inputs. Two of
    these channels are equipped with RCA/Phono connectors (Channel 5
    and 6) (8) and two with Jack connectors (Channels 7 and 8) (9).
    Connect up the Left and Right outputs of your CD player or Cassette
    deck to the Left and Right RCA/Phono inputs on either Channel 5 or 6 of
    the GigRac. Turn up the Main Master Volume control (1) to about halfway,
    and then turn up the Main Volume control (2) on the chosen channel
    until you hear the signal appearing in the loudspeakers.
    Connect up the Left and Right outputs of your Stereo Keyboard to the
    Left and Right Jack inputs on either Channel 7 or 8 of the GigRac. Set
    the volume control of your keyboard to about halfway. Turn up the Main
    Master Volume control (1) to about halfway, and then turn up the Main
    Volume control (2) on the chosen channel until you hear the signal
    appearing in the loudspeakers.
    You may now use the Treble and Bass controls as mentioned above to
    change the tone of the signals.

    13



  • Page 14

    5.

    Apply one of the 8 GigFX digital effects to the signals

    The GigRac’s GIGFX Processor (10) has a choice of 8 studio quality
    digital effects that can be added to any individual or group of signals
    running through the mixer. Usually vocals require some digital reverb or
    echo to be added to them in order to create a more spatial sound that
    is pleasing to the listener.
    Make sure the ‘FX On’ button is selected
    To try this out simply select one of the 8 GigFX presets such as Hall
    Reverb using the selector knob (14). Make sure the ‘Bypass’ switch
    (11) is not selected.
    Turn the ‘FX to Main’ control (12) to about halfway and then gradually
    turn up the individual ‘FX’ send control (13) on the channel you wish to
    add the effect to. As you turn up the ‘FX’ send level you should hear the
    signal change.
    By pressing the ‘FX On’ (11) switch to the off position you can compare
    the original ‘dry’ signal with the ‘wet’ effected signal.
    You can now turn the selector knob (14) to select different types of
    effects for comparative purposes

    A Note on Channel Use

    Channels 1-4 are the most sensitive. It is better to use these channels
    for microphones (particularly if your microphones are fitted with jack
    plugs), and guitars with passive pickups. It is likely that you will need to
    have the pad buttons pressed in if you use mics fitted with XLRs.

    Channels 5-8 are less sensitive, they are ideal for line-level devices such
    as keyboards, CD players and tape players. They will also work with
    guitars with active pickups. Microphones fitted with XLRs will also work
    (unless they need phantom power).

    14



  • Page 15

    Fr
    ont and Rear Panels
    Front
    Front Panel (GigRac 300 and 600)
    Input channel
    The GigRac has a total of 8 channels. Channels 1-4 are designed to
    handle mono microphone or mono line level signals only. Channels 5-8
    are designed to handle mono microphone and mono line level signals but
    will also accommodate stereo signals as well. (The GigRac 300 and 600
    are mono devices and therefore any stereo signals connected will be
    automatically summed to mono before being output.)

    (1)

    Input Connector

    7
    6
    5
    4
    3

    1

    2

    Input Channel
    This connector is a combination Jack/3 Pin XLR connector and can receive
    any of the following types of input connectors
    Microphone cables with Jack connectors
    Microphone cables with 3 pin XLR connectors
    Line input cables with Jack connectors (e.g. guitars, keyboards
    etc.)
    Line input cables with 3 pin XLR connectors.
    15



  • Page 16

    (2) P
    AD switch (Channels 1-4 only)
    PAD
    Pressing the PAD switch reduces the input level by 20dB allowing line or
    mic level signals that would normally be too loud for the Input stage to
    handle to be connected without any audible distortion.

    (3) Main V
    olume Contr
    ol
    Volume
    Control
    The Main Volume Control determines the amount of level sent from the
    channel to the main output mix.
    This allows each channel’s relative volume level to be ‘blended’ together
    to create the final mix whose overall level is then controlled by the Main
    Master Volume control (8) .

    (4) Mon V
    olume Contr
    ol
    Volume
    Control
    The Monitor (Mon) Volume Control determines the amount of level sent
    from the channel to the Monitor (Mon) Output (20) and also the Phones
    Output(18)
    This allows each channel’s relative volume level to be ‘blended’ together
    to create a separate monitor mix whose overall level is then controlled
    by the Mon Master Volume control (9). This feature is used mainly for
    creating a ‘foldback’ mix for the musicians and would normally be sent to
    a monitor speaker with its own amplifier. (This could also be used for
    creating a headphone mix)
    The Mon Volume Control operates independent of the Main Volume Control
    and will therefore not be affected if the Main Volume Control is turned
    up or down. (For the more technically minded, the signal is sourced PreFader and Post EQ)

    (5) FX Control
    The FX Control determines the amount of level sent from the channel to
    the GigFX digital effects processor and also to the ‘FX Bus output’
    connector (21)
    This allows each channel’s relative level to be ‘blended’ together to create
    a separate effects mix whose overall level is then controlled by the ‘FX
    to Main’ (24) and ‘FX to Mon’ (25).
    The FX Bus Output connector could also be used to connect to other
    external devices such as effects processors or recorders.

    16



  • Page 17

    (6) Bass Contr
    ol
    Control
    The Bass Control is set at 80Hz and allows you to either add or remove
    the low frequency content of the signal by 15dB.
    Rotating the control clockwise will ’boost’ the signal, rotating the control
    anticlockwise will ‘cut’ the signal.
    This control is useful for adding more ‘thump’ to low frequency signals
    such as bass guitars and kick drums but can also be used to remove
    unwanted rumble or boominess from signals such as vocal or instrument
    microphones.

    (7) T
    ol
    Trr eble Contr
    Control
    The Treble Control is set at 12kHz and allows you to either add or remove
    the high frequency content of the signal by 15dB.
    Rotating the control clockwise will ‘boost’ the signal, rotating the control
    anticlockwise will ‘cut’ the signal.
    This control is useful for adding ‘crispness’ or ‘sizzle’ to signals with a lot
    of high frequency content such as guitars and cymbals but can also be
    used to remove unwanted sibilance from signals such as vocals.

    17



  • Page 18

    Master Section GigRac 600

    18



  • Page 19

    (8) Main Master Volume Control
    This control determines the overall level that is sent to the internal
    amplification and to the Main Output socket.(19)

    (9) Mon (PHONES) Master Volume Control
    This control determines the overall level that is sent to the Monitor
    Output (Mon Output) and Phones socket.

    (10) Phantom 48V switch
    This switch turns the 48v phantom power On/Off for the 3 pin XLR
    sockets on channels 1-4. When the switch is turned On the red LED
    will illuminate.
    48V phantom power is used to power condenser microphones and DI
    boxes.

    NB! To avoid possible damage to your loudspeakers,
    make sure that the Main and Monitor Master Volume
    controls are turned down fully before switching on the
    48V phantom power.
    (11) Graphic Equaliser
    The Graphic Equaliser is divided into 7 frequency bands. Each frequency
    band can be used to either ‘cut’ or ‘boost’ the Main Output signal by up
    to 10dB.
    The Graphic Equaliser is very useful for compensating for poor room
    acoustics or improving the performance of your loudspeakers.

    (12) To Main/To Mon switch (GigRac 600 only)
    This switch determines which signal path is sent to the Graphic Equaliser.
    Normally the Graphic Equaliser operates on the Main Mix output path
    (To Main) but it might be desirable for some applications to have the
    Graphic Equaliser assigned to the Mon Mix output path.

    19



  • Page 20

    (13) Power LED
    The red Power LED illuminates when the GigRac is switched on.

    (14) Main to Amp 1/Mon to Amp 2 - Main to Amp 1/Main to
    Amp 2 switch (GigRac 600 only)
    This switch determines which signals are sent to Amp 1/Speaker Output
    1 and Amp 2/Speaker Output 2.
    The Choices are:
    Main to Amp 1/Main to Amp 2 – The Main Mix is sent to both Speaker
    Output 1 and Speaker Output 2.
    Main to Amp 1/Mon to Amp 2 – The Main Mix Output will appear on
    Speaker Output 1 and the mon Mix Output will appear on Speaker Output
    2

    20



  • Page 21

    21



  • Page 22

    (15) Amp Clip LED
    The red Amp Clip LED illuminates when the input level to the internal
    amplifier is too high. It is acceptable for this LED to come on momentarily
    every now and then but the Main or Monitor Master Volume (depending
    on which mode has been selected: see (14) above) should be turned
    down if the Amp Clip LED illuminates consistently.

    NB! Continued use of the GigRac with the Amp Clip
    LED illuminated could cause serious damage to your
    GigRac and your loudspeakers!
    (16) Main Output meter
    The 10-segment output meter shows the signal level output from the
    Main Master Volume control.
    It is best to aim to have the red 10dB LED lighting up regularly during
    the loudest signals peaks playing through your GigRac and the 16dB
    LED flicking on very occasionally. This will ensure that a good level is
    passing through the mixer.

    (17) Record Output
    The Record Output is for connecting a recording device such as a
    cassette or mini disk recorder.
    The signal output at the Record Output socket is a post fade signal
    derived from the Main Mix output. The amount of signal level leaving the
    GigRac via the Record Outputs is determined by the Main Master Volume
    control. (8)

    (18) Phones Output
    Connect headphones to the Phones Output. The Phones Output derives
    its signal from the Monitor (Mon) controls on each channel and the over
    all volume of the headphones output is determined by using the Mon
    (Phones) Master Volume control (9)

    (19) Main Output
    The Main Output carries the Main Mix signal after it has passed through
    the Graphic Equaliser and the Main Master Volume control (i.e. the
    same signal that is sent to the internal amplification). This output can
    22



  • Page 23

    be used to send the Main Mix to another amplifier or powered speaker
    or alternatively it can be used to send a ‘submix’ to another mixer’s
    input channel or another recording device.

    (20) Mon Output
    The Mon Output carries the Monitor Mix signal derived from the Mon
    controls on each channel. The Mon output level is controlled by the Mon
    Master Volume control.(9)
    This output is used mainly to send the Mon Mix signal to an on stage fold
    back speaker system of some kind.

    (21) FX Bus Output
    The FX Bus Output carries the FX Mix signal as derived from the FX
    controls on each channel. This allows additional external effects
    processing devices to be used in conjunction with the GigRac’s built in
    GigFX digital effects processor.

    (22) Submix Input
    The Submix Input allows the output from another mixer to be blended
    with the Main Mix Output of the GigRac. This input could also be used
    for connecting an effects return signal from an external effects
    processing device.

    (23) FX Bypass Footswitch
    The FX Bypass Footswitch socket is used for connecting an optional foot
    switch to turn the GigFX processor On and Off.

    (24) Effect on switch
    The effect on switch has a toggle action, the adjacent LED indicates
    when the FX unit is on.

    23



  • Page 24

    Master Section GigRac 300

    (8) Main Master Volume Control
    This control determines the overall level that is sent to the internal
    amplification and to the Main Output socket.

    (9) Monitor Master Volume Control (Mon Master Volume Control)
    This control determines the overall level that is sent to the Monitor
    Output (Mon Output) and Phones socket.
    24



  • Page 25

    (10) Phantom 48V switch
    This switch turns the 48v phantom power On/Off for the 3 pin XLR
    sockets on channels 1-4. When the switch is turned On the red LED
    will illuminate.
    48V phantom power is used to power condenser microphones and DI
    boxes.

    NB! To avoid the possible damage to your loudspeakers,
    make sure that the Main and Monitor Master Volume
    controls are turned downfully before switching on the
    48V phantom power.
    (11) Graphic Equaliser
    The Graphic Equaliser is divided into 7 frequency bands. Each frequency
    band can be used to either ‘cut’ or ‘boost’ the Main Output signal by up
    to 10dB.
    The Graphic Equaliser is very useful for compensating for poor room
    acoustics or improving the performance of your loudspeakers.

    (12) Main To Amp/Mon To Amp switch
    This switch is usually set to ‘Main To Amp’ (Up position), which means
    that the output from the Main Master Volume (8) is sent to the internal
    amplification and then out of the Speaker Outputs on the rear of the
    GigRac.
    Alternatively it is possible by pressing the switch down, to send the
    output from the Mon Master Volume (9) to the internal amplification
    and then out of the Speaker Outputs.
    When the ‘Mon to Amp’ mode is selected the Main Output is not sent to
    the Speaker 1 and Speaker 2 outputs but is available at the Main output
    Jack socket (18)

    (13) Power LED
    The red Power LED illuminates when the GigRac is switched on.

    25



  • Page 26

    (14) Amp Clip LED
    The red Amp Clip LED illuminates when the input level to the internal
    amplifier is too high. It is acceptable for this LED to come on momentarily
    every now and then but the Main or Monitor Master Volume (depending
    on which mode has been selected – see (12) above) should be turned
    down if the Amp Clip LED illuminates consistently.

    NB! Continued use of the GigRac with the Amp Clip
    LED illuminated could cause serious damage to your
    GigRac and your loudspeakers!
    (15) Main Output meter
    The 10-segment output meter shows the signal level output from the
    Main Master Volume control. (8)
    It is best to aim to have the red 10dB LED lighting up regularly during
    the loudest signals peaks playing through your GigRac and the 16dB
    LED flicking on very occasionally. This will ensure that a good level is
    passing through the mixer.

    (16) Record Output
    The Record Output is for connecting a recording device such as a
    cassette or mini disk recorder.
    The signal output at the Record Output socket is a post fade signal
    derived from the Main Mix output. The amount of signal level leaving the
    GigRac via the Record Outputs is determined by the Main Master Volume
    control.(8)

    (17) Phones Output
    Connect headphones to the Phones Output. The Phones Output derives
    its signal from the Monitor (Mon) controls on each channel and the over
    all volume of the headphones output is determined by using the Mon
    (Phones) Master Volume control (9)

    (18) Main Output
    The Main Output carries the Main Mix signal after it has passed through
    the Graphic Equaliser and the Main Master Volume control (i.e. the
    same signal that is sent to the internal amplification). This output can
    26



  • Page 27

    be used to send the Main Mix to another amplifier or powered speaker
    or alternatively it can be used to send a ‘submix’ to another mixer’s
    input channel or another recording device.

    (19) Mon Output
    The Mon Output carries the Monitor Mix signal derived from the Mon
    controls on each channel. The Mon output level is controlled by the Mon
    Master Volume control.(9)
    This output is used mainly to send the Mon Mix signal to an on stage fold
    back speaker system of some kind.

    (20) FX Bus Output
    The FX Bus Output carries the FX Mix signal as derived from the FX
    controls on each channel. This allows additional external effects
    processing devices to be used in conjunction with the GigRac’s built in
    GigFX digital effects processor.

    (21) Submix Input
    The Submix Input allows the output from another mixer to be blended
    with the Main Mix Output of the GigRac.
    This input could also be used for connecting an effects return signal
    from an external effects processing device.

    (22) FX Bypass Footswitch
    The FX Bypass Footswitch socket is used for connecting an optional
    foot switch to turn the GigFX processor On and Off.

    (23) Effect On Switch
    The effect on switch has a toggle action, the adjacent LED indicates
    when the FX unit is on.

    27



  • Page 28

    Rear Panel GigRac 600

    (1) Power Switch
    This switch turns the GigRac On or Off. The red Power LED (13) on the
    front panel will illuminate to confirm this.

    NB! Before switching the GigRac On or Off, make sure
    that the Main and Mon Master Volume controls are
    turned fully down.
    (2) Power Socket
    Connect the supplied power cable to this socket.

    (3)

    Speakers Outputs (Amp 1 and Amp 2)

    The Speaker Outputs are available as Neutrik Speakon connectors and
    standard ¼” Jack connectors.
    Connect your loudspeakers to these outputs. The signal sent to the
    Speakon connectors and the Jack sockets is exactly the same.
    Use the appropriate connector type to match the input connectors on
    your loudspeakers. The GigRac 600 is designed to work with loudspeakers
    rated at either 8 ohms or 4 ohms.
    The minimum load that either of the amplifiers inside the GigRac 600
    should be presented with is 4 ohms. this means that a single 4 or 8 ohm
    speaker can be connected to each amplifier outputs as shown in Fig 1.
    Alternatively, two 8 ohm speakers can be connected in parallel to each
    amplifier output, as shown in Fig 2. Two speakers connected like this
    gives a combined load of 4 ohms.
    28



  • Page 29

    29



  • Page 30

    Rear Panel GigRac 300

    (1) Power Switch
    This switch turns the GigRac On or Off. The red Power LED (13) on the
    front panel will illuminate to confirm this.

    NB! Before switching the GigRac On or Off, make sure
    that the Main and Mon Master Volume controls are
    turned fully down.
    (2) Power Socket
    Connect the supplied power cable to this socket.

    (3)

    Speakers Outputs

    The Speaker Outputs are available as Neutrik Speakon connectors and
    standard ¼” Jack connectors.
    Connect your loudspeakers to these outputs. The signal sent to the
    Speakon connectors and the Jack sockets is exactly the same.
    Use the appropriate connector type to match the input connectors on
    your loudspeakers.
    The minimum load that the amplifier inside the GigRac should be presented
    with is 4 ohms. This means that a single 8 ohm speaker can be connected
    to each of the speaker outputs as shown in Fig1, or two 8 ohm speakers
    can be connected in parallel to one of the speaker outputs as shown in
    Fig 2. Two speakers connected like this gives a combined load of 4
    ohms.

    30



  • Page 31

    31



  • Page 32

    Rackmounting Y
    our GigRac
    Your
    The GigRac 300 or 600 can be rack mounted into a standard 19’’rack.This
    is useful for fixed instalations or for applications where the GigRac might
    need to be installed into a portable 19’’ rack along with other equipment.

    32



  • Page 33

    Connectors and Leads

    33



  • Page 34

    Block Diagram GigRac 600

    34



  • Page 35

    Block Diagram GigRac 300

    35



  • Page 36

    War
    ranty
    arranty
    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 User purchased the Equipment, provided such a person is authorised for this purpose by Soundcraft or its accredited Distributor.
    Equipment means the equipment supplied with this manual.

    2

    If within the period of twelve months from the date of delivery of the
    Equipment to†the End User it shall prove defective by reason only of
    faulty materials and/or workmanship to such an extent that the effectiveness and/or usability thereof is materially affected the Equipment or
    the defective component should be returned to the Dealer or to
    Soundcraft and subject to the following conditions the Dealer or
    Soundcraft will repair or replace the defective components. Any components replaced will become the property of Soundcraft.

    3

    Any Equipment or component returned will be at the risk of the End
    User whilst in transit (both to and from the Dealer or Soundcraft) and
    postage must be prepaid.

    4

    This warranty shall only be valid if:
    a)
    the Equipment has been properly installed in accordance with
    instructions contained in Soundcraftís manual; and
    b)
    the End User has notified Soundcraft or the Dealer within 14
    days of the defect appearing; and
    c)
    no persons other than authorised representatives of Soundcraft
    or the Dealer have effected any replacement of parts maintenance
    adjustments or repairs to the Equipment; and
    d)
    the End User has used the Equipment only for such purposes as
    Soundcraft recommends, with only such operating supplies as meet
    Soundcraftís specifications and otherwise in all respects in accordance
    with Soundcraftís recommendations.

    5

    Defects arising as a result of the following are not covered by this
    Warranty: faulty or negligent handling, chemical or electro-chemical or
    electrical influences, accidental damage, Acts of God, neglect, deficiency in electrical power, air-conditioning or humidity control.

    6

    The benefit of this Warranty may not be assigned by the End User.

    7

    End Users who are consumers should note their rights under this
    Warranty are in addition to and do not affect any other rights to which
    they may be entitled against the seller of the Equipment.

    36



  • Page 37

    Gigrac 300 / 600 Specifications
    Noise
    EIN 150 ohms 20 - 22kHz CH1 - CH4
    EIN 150 ohms 20 - 22kHz CH5 - CH6
    Main out Level control mid
    Mon out Level control mid
    Amp out

    -123 dBu
    -123 dBu
    -78 dBu
    -80 dBu
    -57 dBu

    Crosstalk
    Main cutoff
    Mon cutoff
    Frequency Response
    20 - 22Khz rel 1kHz Line in to Main out

    +0.2/-2.5 dB

    THD+N
    Mic i/p -20dB Pad 0dBu I/P at Main out (22Hz-22kHz)
    Mic i/p to Amp Out @ full power 22-22kHz

    0.15 %
    0.15%

    INPUTS
    Mic Input Impedance
    Line Input Impedance
    Max Input Mic (20dB pad )
    Max Input Line (20dB pad )
    Max Mic gain to main out

    5.5 kohms
    30 kohms
    -3.5 dBu
    10 dBu
    60 dB

    INPUTS CH5 CH8
    Mic Input Impedance
    Line Input Impedance
    Max Input Mic
    Max Input Line
    Max Mic gain to main out

    2.4 kohms
    40 kohms
    -18 dBu
    3 dBu
    50 dB

    OUTPUTS
    Max out main / mon
    Power Output Gigrac 300:
    Power Output Gigrac 600:

    -80 dB
    -80 dB

    18dBu
    300W into 4 ohms
    2 X 300W into
    4 ohms

    CONNECTORS
    (All Jacks are 3 pole 1/4")
    Mic: Balanced XLR combi connectors/ Balanced jack combi connectors
    Line: Balanced Jack / combi connectors / Unbalanced RCA phono
    FX bus output: Impedance Balanced Jack
    Submix in: Unbalanced Jack
    Main out: Impedance Balanced Jack
    Mon out: Impedance Balanced Jack
    Record out: unbalanced RCA phono
    Phones: Jack
    Speakers: Speakon (pins +1 and -1) and Jack

    37



  • Page 38

    Your Notes:

    38



  • Page 39

    39



  • Page 40

    #15713 GIGRAC User Guide Cover

    17/11/03 3:03 pm

    Page 1

    GREAT SOUND MADE EASY

    Soundcraft
    Harman International Industries Ltd
    Cranborne House, Cranborne Road, Potters Bar, Herts, EN6 3JN, UK
    TEL: +44 (0)1707 665000 FAX: +44 (0)1707 660742 EMAIL: info@soundcraft.com
    Soundcraft USA
    8500 Balboa Blvd., Northridge, CA 91329, USA
    TEL: +1-818-920-3212 FAX: +1-818-920-3208 EMAIL: soundcraft-usa@harman.com
    www.gigrac.com
    Soundcraft reserves the right to improve or otherwise alter any information supplied in this document or any other documentation supplied hereafter. E&OE 11/03.
    This equipment complies with the EMC Directive 89/336/EEC

    User Guide






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