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Page 3: ...our console 10 Facilities 10 Input Channel 10 Stereo Sections 15 Group Sections 17 Master Section 18 Using your SPIRIT LIVE 4Console 20 Initial Set Up 20 Applications 22 Public Address 22 Recording 24...
Page 4: ...nder The Expander can be attached quickly and securely to the console requiring only a screwdriver to complete the installation SPIRIT LIVE 4 incorporates circuit technology identical to that used on...
Page 5: ...master level control for the Left Right Mono and Auxiliary Send busses with separate AFL monitoring on each Auxiliary Send and the Mono output The Mix L R and Group outputs all have insert points for...
Page 6: ...ly destructive feature of the mixer They have a similar effect on the frequency response of the input channel as the tone controls on a hi fi system but with much greater precision and allow particula...
Page 7: ...efore Pre or after Post another particular section This is explained further in the detailed description of facilities A mixer is often judged amongst other factors by the amount of Headroom available...
Page 8: ...rrectly Two different types of audio connectors are used 3 pin XLR and 1 4 three pole A gauge jacks These are used in several configurations as shown in the diagrams below Balanced Input 2 Hot ve 3 Co...
Page 9: ...ensation techniques to cancel out the effects of variation in ground potential between the mixer and other equipment which would otherwise show up as hum If the output is driving a device or amplifier...
Page 10: ...below Mixer Mixer Source Device Output Device GND GND GND INPUT OUTPUT Ground loop through screen and chassis Mixer Mixer Source Device Source Device GND UNBALANCED BALANCED INPUT Avoid running audio...
Page 11: ...ternal structure of the console Each Component has a specific function and only by getting to know what each part is supposed to do will you be able to tell if there is a genuine fault Many faults are...
Page 12: ...ophones may be used without causing damage even when the 48V power is connected but care must be taken when using unbalanced sources because of the voltage present on pins 2 and 3 of the XLR connector...
Page 13: ...section The signal from the channel appears on the TIP of the plug and is returned on the RING The insert point allows limiters compressors and other signal processing units to be added as required t...
Page 14: ...control which determines at which frequency the boost cut action will be centered The LF sections are essentially Swept Low Frequency controls covering a range from 40 to 400Hz and providing much gre...
Page 15: ...3 4 and 5 are derived after the channel fader POST FADE and therefore follow any changes in fader level They are normally used to drive effects processing units which are fed back into the mixer and...
Page 16: ...es as a PEAK indicator to warn when an excessively high signal level is present in the channel The signal is sampled at two points in the channel immediately after the input amplifier PRE HI PASS FILT...
Page 17: ...the 10 switch alters the input sensitivity to match the 10dBV signals from most Hi Fi systems or semi professional tape machines allowing the inputs to be quickly switched to match for instance a cas...
Page 18: ...iases the signal to the Left buss and Groups 1 3 balance right to the Right buss and Groups 2 4 7 PFL When the PFL switch is pressed the prefade signal is fed to the Headphones where it replaces the s...
Page 19: ...otary control A panel marking indicates the nominal unity gain position 4 PAN The Group PAN control determines the position of the signal within the stereo image which is routed to the mix L R busses...
Page 20: ...puts are standard male XLR 3 connectors driven by ground compensated amplifiers 11 INSERTS These are similar to the Input Channel Inserts and allow external processing equipment to be inserted into th...
Page 21: ...uts Level is set by the TB control and three switches route the signal selectively to Mix L R Groups GRPS or AUX 1 2 17 HEADPHONE VOLUME This control sets the level of the PHONES output at the socket...
Page 22: ...Initial Set Up The diagram on page 5 demonstrated how the matching of input gain to the signal source was crucial to avoid distortion at one extreme and excessive noise at the other Set up individual...
Page 23: ...d Output Faders You should try to use only as much microphone gain as required to achieve a good balance between signals with the faders set as described above If the input gain is set too high the ch...
Page 24: ...xample 1 Public Address Stereo Output In this basic set up an assortment of sources are connected to the input channels microphone to mic inputs and a keyboard and guitar to line inputs Note that some...
Page 25: ...input channels allows individual selection to the Centre output by routing to Group 1 Example 3 Public Address Mono Output In this example the console is used to feed loudspeakers in Mono only The co...
Page 26: ...unit 2 TRACK TAPE MACHINE REVERB which is returned to the console on RET1 and RET2 Example 5 Multitrack Recording In this last example the mixer is connected to a multitrack tape machines and the main...
Page 27: ...ypically the feeds to the mix are implemented on rotary level controls balance the relative levels of the left and right channels of a stereo signal clipping the onset of severe distortion in the sign...
Page 28: ...tely controlled line level feed for additional loudspeakers pan pot abbreviation of panorama controls levels sent to left and right outputs peaking an equaliser response curve affecting only a band of...
Page 29: ...is can be done without removing the PCB as shown below by carefully cutting the leads of the link above the PCB at the points marked To reinstate the 48V fit a replacement link Part No AZ2222 which is...
Page 30: ...52 R56 R54 J1 J1 PRE PRE J2 J2 POST POST INPUT BOARD SC3209 R48 C28 C27 R51 R50 L10 To change AUX 2 to POST FADE remove the PCB from the console and carefully unsolder link J1 using the minimum of hea...
Page 31: ...E Input faders down channels routed to Groups Pans central Group gain at unity Group 1 84 5dBu Group 2 84 5dBu Group 3 84 5dBu Group 4 84 5dBu E I N Microphone Input Maximum Gain terminated 150R 127 8...
Page 32: ...phone Input 2k Line Input 10k Insert Sends 75 Insert Returns 10k Outputs 75 INPUT OUTPUTLEVELS Mic Input Maximum Level 10dBu Line Input Maximum Level 30dBu Mix Out Maximum Level 21dBu Mono Out Maximum...
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Page 34: ...RET 2 RET 2 RET 3 RET 3 RET 4 RET 4 PAN PAN PAN PAN PFL PFL PFL PFL LEFT RIGHT PHONES AFL PFL AFL PFL AUX 1 2 AUX 1 2 GRPS TB TB MIC TB MIC AFL AFL AUX 5 AUX 5 LEFT RIGHT PFL RIGHT PFL MONO L R GRP 1...
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Page 36: ...Unit C6 Hastingwood Trading Estate 35 Harbet Road London N18 3HU Phone 020 8803 7400 email office gradav co uk FAX 020 8803 5060 Web www gradav co uk...
