Summary of Contents for aci VGM-804
-
Page 1: Installation And Use
VGM-804 Gated Microphone Mixer Installation and Use ACI-AppliCAD, Inc. Version 2.0 (732) 751-2555 www.aci-applicad.com... -
Page 3: Table Of Contents
Table of Contents Introduction ---------------------------------------- 1 Features & Benefits Quick Start Guide --------------------------------- 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 &... -
Page 5: Introduction
Introduction Congratulations on your purchase of the VGM-804 Gated Microphone Mixer. Because its design targets sound reinforcement applications, your audience will enjoy higher quality sound than with generic mixers or consoles. At first, you’ll find a refreshingly simple exterior. It’s straightforward to set up, and easy to use. Soon, however, you’ll come to appreciate how the mixer allows you to make better use of your sound system. -
Page 6: Quick Start Guide
Quick Start Guide – Connecting Your Components Gather your input and output cables and make the connections you need 16 VAC Power Line Output Microphone Input Jacks 1 – 8 Plug in supplied AC Balanced line output connects to Inputs are Lo-Z, balanced XLR Phantom power available for condenser mics (See page 4) adapter here. - Page 7 Quick Start Guide – Installation Issues Low-impedance microphones with standard cable wiring plug directly into the microphone jacks without any modifications. Here’s how to handle some circumstances that may affect your installation: Replacing an old mixer – If your installation has fixed microphone jacks with cables run as part of the building (though walls, under floor, above ceiling), examine how these cables terminate at your old mixer.
-
Page 8: Microphone Settings
Quick Start Guide – Microphone Settings The mixer allows you to tailor operating features for each microphone. Make these selections with the bottom-panel switches shown below: Phantom Gating Power Compression Threshold switch banks each have numbered switches COMPRESSION Phantom Power corresponding to the eight microphone channels (1-8). - Page 9 In many installations, you’ll need ready access only to the mixer and your sound sources. Your VGM-804 features a gain preset for each input. You can adjust these with a fine slot screwdriver, to bring differing source levels into agreement. These are factory set to midrange, so simply adjust any “low”...
-
Page 10: Operator's Guide
Operator’s Guide – Basics The power amplifier and preset adjustments you’ve just completed, along with the VGM- 804’s microprocessor “brain”, make operation as simple as it can be! POWER Switch – At the far right of the panel. Switch ON for use. Many users prefer to plug the mixer’s AC adapter (as well as the rest of their audio gear) into a switched outlet strip, leaving the switch on. - Page 11 Level Bargraph Display – Shows the program level. Its first yellow LED indicates a level of 0 VU, equal to +4dBv at the VGM-804’s balanced output. Each LED above or below this point represents a change of + or – 3dB output level.
- Page 12 Operator’s Guide – Managing Microphones Your goal as sound operator is to provide sufficient, quality sound from all program participants, to all in your audience. We’ve prepared this section to help you do this. Your sound system allows participants to speak naturally or even softly as their material requires, confident that the audience hears every word clearly.
- Page 13 Good miking lets everyone be heard with lower gain, resulting in sufficient sound without feedback problems. The VGM-804's sound gating automatically increases your available gain before feedback, by muting • unused microphones. Unneeded mics receive no useful sound, only feedback and noise. You win about 30% more headroom for each mic shut off.
-
Page 14: How Sound Gating Works
Operator’s Guide – How Sound Gating Works The VGM-804’s microcontroller measures all input levels continuously, 2500 times per second. It “learns” the ambient sound at each mic to ignore background noise such as from air conditioning. Any mic whose level is 6dB louder than the others, gates ON. Once live, a mic remains ON as long as at least one of the following three conditions are met: •... -
Page 15: In Case Of Difficulty
Your warranty is one year from date of purchase. Out of warranty, our current repair charge is a flat rate of $65. plus shipping (subject to change). Whether in or out of warranty, you’ll receive fast, courteous service. Like the VGM-804 itself, we are devoted to solving problems in sound reinforcement. -
Page 16: Specifications
Specifications Inputs & Outputs: 8 MIC inputs. Balanced, Low-Z, XLR-F. Bass rolled off to minimize boominess. Individually selectable compression and phantom power. 2 AUX inputs. Unbalanced RCA. Flat, uncompressed. 2 Outputs, RCA unbalanced, XLR-M balanced. Front Panel Controls: Level controls on all inputs. Preset gain adjustments on all inputs.