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Содержание VGM-804

Страница 1: ...VGM 804 Gated Microphone Mixer Installation and Use ACI AppliCAD Inc Version 2 0 732 751 2555 www aci applicad com ...

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Страница 3: ... 2 Connecting Your Components Installation Issues Microphone Settings Setting Audio Levels Operator s Guide 6 Basics Managing Microphones How Sound Gating Works Optimizing The Sound Gating In Case of Difficulty 11 Troubleshooting Phone Support Warranty Specifications 12 ...

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Страница 5: ...ctive ones ON The last live mic remains ON until another is used Reduces distracting noise allows more volume with less reverberation Gate Clip LEDs Green shows inputs gated ON red indicates clipping Identifies mics in use Warns of excessive levels Compression Limits unusually loud sounds Listeners remain comfortable Compress LED Lights when loud sounds trigger compression Helps the operator keep ...

Страница 6: ...White wire 3 Black wire 1 2 3 Microphone Input Jacks 1 8 Inputs are Lo Z balanced XLR Phantom power available for condenser mics See page 4 Standard wiring for microphone cables Auxiliary Inputs 1 2 RCA jacks to play line level mono sources CD player Telephone interface receive Combine stereo sources with Y adapters see page 3 16 VAC Power Plug in supplied AC adapter here Auxiliary Output RCA jack...

Страница 7: ... amplifiers Wireless mics Most wireless microphone receivers allow you to select a balanced microphone level output Choose this output and connect each wireless receiver to a microphone input of the mixer This way the mixer handles each wireless mic as it does other microphones providing the gating and selectable compression features Set any level controls on the wireless receivers to match their ...

Страница 8: ...r microphones require phantom power Dynamic mics don t need it but should tolerate it Quick Start Guide Setting Audio Levels This mixer has a balanced line output for professional equipment and an auxiliary output for consumer grade amplifiers and other devices The balanced output is capable of a high level 28dBv Following equipment should be capable of a similar maximum level When any equipment i...

Страница 9: ...ly satisfying but still comfortable listening level Enable your equalizer The overall level shouldn t change much but adjust as needed You may find that under actual use when the auditorium is filled slightly more volume is required In that case increase your power amplifier gain as needed Once you have found the right setting for your power amplifier it should need little further adjustment Inste...

Страница 10: ... page The gating and compression features mean you ll do less knob turning than would be needed with non automatic mixers Gate Clip LEDs under each microphone gain control Each lights green when the mixer gates that microphone ON Use these LEDs to identify live mics For example during a walk though test before the program have your assistant speak into each mic in turn the LEDs show which mixer ch...

Страница 11: ... yellow at 6dB and red when compressing by 9dB The compressor s THAT Analog Engine IC compresses with virtually inaudible distortion To use the mixer s compressor first make sure that compression is enabled on the desired mic inputs see page 4 Then adjust each mic s level control until the COMPRESS LED blinks green and perhaps yellow on level peaks If totally dark you might want to turn up that ch...

Страница 12: ...ou guarantee no feedback and no ringing but no benefit as well As you increase your level controls the audience gets to hear more of the program as amplified sound overcomes background noises The sound becomes louder than your participants could provide alone your system is producing gain In fact the expression raising the gain simply means turning up your level controls This graph shows that as y...

Страница 13: ...und gating feature there s far less need for you to turn mics up and down during the program We still recommend however turning down mics that are obviously finding only noise Stand mics being moved by stage handlers Certain wireless receivers that pick up radio noise when their mics are switched OFF turn up wireless mics only after they ve been switched ON In short working this mixer is like driv...

Страница 14: ...n level its microprocessor receives detailed information on mic usage thus can make better gating decisions Use your level display to verify this Have an assistant speak or read into a mic while you slowly advance its control As you turn up the mic listen to the sound in your auditorium while observing the bargraph The display should reach 1 2 yellow LEDs when your sound has found its comfortable ...

Страница 15: ...is very powerful so your power amplifier s gain control often requires a lower setting than with other mixers you may have used Set it according to the instructions on Page 5 If any input s seem excessively loud even at a low setting 3 or less at your mixer s level control reduce the preset s for the affected channel s see Page 5 In Case of Difficulty Phone Support Warranty Please note that this p...

Страница 16: ...IC channel Compression Enables compression Phantom Power Provides 15VDC for condenser mic Gating threshold adjustment fine adjusts the gating decision process Power 9 Watts from 18VAC wall transformer Audio Specs Max Output Level balanced 28dBv at clipping unloaded less 6dB 600 Ω load Meter zero VU first yellow LED 4dBv less 6dB 600 Ω load AUX Output Level unbalanced 12dBv at clipping MIC Gain To ...

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