Aviom A640 User manual

Page iAviom A640 Personal Mixer User Guide
User Guide

i
READ THIS FIRST
Important Safety Instructions
1. Read these instructions.
2. Keep these instructions.
3. Heed all warnings.
4. Follow all instructions.
5. Do not use this apparatus near water.
6. Clean only with a dry cloth.
7. Do not block any ventilation openings. Install in accordance with the manufacturer’s instructions.
8. Do not install near any heat sources such as radiators, heat registers, stoves, or other apparatus
(including amplifiers) that produce heat.
9. 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 third prong are provided for your safety. If the provided plug
does not fit your outlet, consult an electrician for replacement of the obsolete outlet.
10. Protect the power cord from being walked on or pinched, particularly at plugs, convenience
receptacles, and the point where they exit the apparatus.
11. Only use attachments/accessories specified by the manufacturer.
12. Use only with the cart, stand, tripod, bracket, or table specified by the manufacturer, or sold with
the apparatus. When a cart is used, use caution when moving the cart/apparatus combination to
avoid injury from tip-over.
13. Unplug this apparatus during lightning storms or when unused for long periods of time.
14. Refer all servicing to qualified personnel. Servicing is required when the apparatus has been
damaged in any way, such as when 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, does not operate normally, or has been dropped.
15. No on/off power switches are included in the system. The external power supply should be used to
control power to an Aviom device. This power supply should remain readily operable.
16. The solid line over dashed line symbol ( ) indicates that the input voltage must be a DC
voltage.
17. The box within a box symbol ( ) indicates that the external power supply is double insulated.

ii
TO REDUCE THE DANGER OF ELECTRICAL SHOCK DO NOT REMOVE COVERS.
NO USER SERVICEABLE PARTS INSIDE.
REFER SERVICING TO QUALIFIED SERVICE PERSONNEL ONLY.
To reduce the risk of fire or electrical shock, do not expose this product to rain or other types of moisture.
To avoid the hazard of electrical shock, do not handle the power cord with wet hands.
Replace fuse with same type and rating.
Operating Temperature: 0˚C to 50˚C (32˚F to 122˚F)
Risque de choc électrique – ne pas ouvrir. Pour réduire le risque de feu ou de choc électrique, ne pas exposer cet équipement
à la pluie ou la moisissure. Pour réduire le risque de choc électrique, ne pas retirer le couvercle. Pièces non remplaçables par
l’utilisateur. Confier la réparation à une personne qualifiée. Attention – utiliser seulement un fusible de rechange de même type.
Cet appareil est conforme à la section 15 de la norme FCC. Son fonctionnement est soumis aux conditions suivantes : (1) cet
équipement ne doit pas causer des interférences nocives, et (2) cet équipement doit accepter toute interférence captée incluant les
interférences pouvant causer des opérations indésirables.
Cet appareil numérique de Classe B est conforme à la norme NMB-003 du Canada.
WARNING!
! !
CAUTION:
• Using any audio system at high volume levels can cause
permanent damage to your hearing.
• Set your system volume as low as possible.
• Avoid prolonged exposure to excessive sound pressure levels.
IMPORTANT:
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 in a residential installation. This equipment generates, uses and can radiate radio frequency
energy and, if not installed and used in accordance with the instructions, may cause harmful interference
to radio communications. However, there is no guarantee that interference will not occur in a particular
installation. If this equipment does cause harmful interference to radio or television reception, which
can be determined by turning the equipment off and on, the user is encouraged to try to correct the
interference by one or more of the following measures:
• Reorient or relocate the receiving antenna.
• Increase the separation between the equipment and receiver.
• Connect the equipment into an outlet on a circuit different from that to which the
receiver is connected.
• Consult the dealer or an experienced radio/TV technician for help.
Changes or modifications to the product not expressly approved by Aviom, Inc. could void the user’s FCC
authority to operate the equipment.

iii
Trademarks
Aviom, A-Net, the A-Net icon, Pro16, Pro16e, Enhance, and Network Mix Back are trademarks of Aviom, Inc.
All other trademarks are the property of their respective owners.
© Aviom, Inc. All rights reserved.
Information is subject to change without notice.
Notice of Rights
All rights reserved. No part of this document may be reproduced or transmitted in any form or by any
means—electronic, mechanical, photocopy, recording, or otherwise—without written permission of
Aviom, Inc.
Certifications
EMC:
EN 55032:2015/AMD1:2019
CISPR 32:2015/ AMD1:2019
ICES-003, Issue 7, October 2020
FCC 47 CFR Part 15: 2021
CISPR 35 Edition 1.0 2016-08
Safety:
UL 62368-1:2019 Ed.3
CSA C22.2#62368-1:2019 Ed.3
ETL/cETL Listed and RoHS Compliant
Pb
Pb-Free
Aviom products are designed and manufactured in the USA.

iv
Aviom, Inc. Limited Warranty
Aviom, Inc. warrants this product against defects in materials and workmanship for a period of one year
from the date of the original retail purchase.
This warranty does not apply if the equipment has been damaged due to misuse, abuse, accident, or
problems with electrical power. The warranty also does not apply if the product has been opened or
modified in any way; if the product serial number has been damaged, modified, or removed; or if the
original Quality Assurance label has been damaged, modified, or removed.
If a defect is discovered, first write or call Aviom, Inc. to obtain a Return Authorization number. No service
will be performed on any product returned without prior authorization. Aviom, Inc. will, at its option, repair
or replace the product at no charge to you. The product must be returned during the warranty period,
with transportation charges prepaid to Aviom, Inc., 1157 Phoenixville Pike, Suite 201, West Chester, PA
19380. You must use the product’s original packing materials for shipment. Shipments should be insured
for the value of the product. Include your name, address, phone number, description of the problem, and
copy of the original bill of sale with the shipment. The Return Authorization number should be written on
the outside of the box.
THIS LIMITED WARRANTY GIVES YOU SPECIFIC LEGAL RIGHTS. YOU MAY HAVE OTHER RIGHTS, WHICH
VARY FROM STATE TO STATE (OR JURISDICTION TO JURISDICTION). AVIOM’S RESPONSIBILITY FOR
MALFUNCTIONS AND DEFECTS IN HARDWARE IS LIMITED TO REPAIR AND REPLACEMENT AS SET FORTH
IN THIS LIMITED WARRANTY STATEMENT. ALL EXPRESS AND IMPLIED WARRANTIES FOR THE PRODUCT,
INCLUDING BUT NOT LIMITED TO ANY IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
A PARTICULAR PURPOSE, ARE LIMITED IN DURATION TO THE WARRANTY PERIOD SET FORTH ABOVE. NO
WARRANTIES, WHETHER EXPRESS OR IMPLIED, WILL APPLY AFTER SUCH PERIOD.
AVIOM, INC. DOES NOT ACCEPT LIABILITY BEYOND THE REMEDIES SET FORTH IN THIS LIMITED WARRANTY
DOCUMENT. AVIOM, INC.’S LIABILITY IS LIMITED TO THE REPAIR OR REPLACEMENT, AT OUR OPTION, OF
ANY DEFECTIVE PRODUCT, AND SHALL IN NO EVENT INCLUDE INCIDENTAL OR CONSEQUENTIAL DAMAGES
OF ANY KIND.
SOME STATES DO NOT ALLOW EXCLUSIONS OR LIMITATION OF IMPLIED WARRANTIES OR LIABILITY FOR
INCIDENTAL OR CONSEQUENTIAL DAMAGES, SO THE ABOVE LIMITATIONS MAY NOT APPLY TO YOU.

v
Warranty Information
Please record the following information for future reference:
Your Authorized Aviom Dealer:
Name:
Address:
Phone:
Serial Numbers of Your Aviom Products:
Date of Purchase:
Your Authorized Aviom Dealer is your primary source for service and support. The information recorded
above will be helpful in communicating with your Authorized Aviom Dealer should you need to contact
Aviom Customer Service. If you have any questions concerning the use of this unit, please contact your
Authorized Aviom Dealer first. For additional technical support, or to find the name of the nearest
Authorized Aviom Repair Station, check the Aviom web site at www.aviom.com.
To fulfill warranty requirements, your Aviom product should be serviced only at an authorized Aviom
service center. The Aviom serial number label must appear on the outside of the unit, or the Aviom
warranty is void.
This manual and its contents are copyrighted by Aviom, Inc. All rights are reserved by Aviom, Inc. This
document may not, in whole or in part, be copied, photocopied, reproduced, translated, or reduced to any
electronic medium or machine-readable form without prior written consent from Aviom, Inc.
The software and/or firmware contained within Aviom products is copyrighted and all rights are reserved
by Aviom, Inc.
Although every effort has been made to ensure the accuracy of the text and illustrations in this manual, no
guarantee is made or implied as to the accuracy of the information contained within.

Page 1Aviom A640 Personal Mixer User Guide
Table of Contents
Important Safety Instructions . . . . . . . . . . . . . . . . . i
Certications . . . . . . . . . . . . . . . . . . . . . . . . . iii
Aviom, Inc. Limited Warranty . . . . . . . . . . . . . . . . . iv
A640 Personal Mixer . . . . . . . . . . . . . . . . . . . . . 5
Features . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
Compatibility . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
About A-Net . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
Conventions Used in this Document . . . . . . . . . . . . . . . . 8
Using Personal Mixers . . . . . . . . . . . . . . . . . . . . . 8
Cat-5 Cables. . . . . . . . . . . . . . . . . . . . . . . . . . 8
A-Net Distributors . . . . . . . . . . . . . . . . . . . . . . . 8
Button Presses. . . . . . . . . . . . . . . . . . . . . . . . . 8
Network Channels and Slots . . . . . . . . . . . . . . . . . . 8
A640 Front Panel Interface . . . . . . . . . . . . . . . . . . 9
A-Net LED . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
Save Button . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
Recall Button. . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
View Button . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
Mixer Setup Button. . . . . . . . . . . . . . . . . . . . . . . . . 12
Aux Volume . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
Master Volume . . . . . . . . . . . . . . . . . . . . . . . . . . 13
Master EQ Button . . . . . . . . . . . . . . . . . . . . . . . . . 13
Color LCD . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14
Left/Right Rotary Encoders . . . . . . . . . . . . . . . . . . . . . 14
Intercom Button . . . . . . . . . . . . . . . . . . . . . . . . . . 15
Ambience Button . . . . . . . . . . . . . . . . . . . . . . . . . 15
Built-in Ambience Mic . . . . . . . . . . . . . . . . . . . . . . . 15
Assignable Soft Buttons . . . . . . . . . . . . . . . . . . . . . . 16
Trim All Function . . . . . . . . . . . . . . . . . . . . . . . . . . 16
Channel Label Strip. . . . . . . . . . . . . . . . . . . . . . . . . 17
Channel Buttons . . . . . . . . . . . . . . . . . . . . . . . . . . 17
Channel Active LEDs . . . . . . . . . . . . . . . . . . . . . . . . 18
Channel Mute LEDs . . . . . . . . . . . . . . . . . . . . . . . . 18
Favorite Button. . . . . . . . . . . . . . . . . . . . . . . . . . . 18
A640 Rear Panel . . . . . . . . . . . . . . . . . . . . . . . 20
Stereo Audio Outputs . . . . . . . . . . . . . . . . . . . . . . . 20
XLR Mono Output . . . . . . . . . . . . . . . . . . . . . . . . . 20
USB Port . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21
A-Net In Port . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21
DC Power Connector . . . . . . . . . . . . . . . . . . . . . . . . 22

Page 2Aviom A640 Personal Mixer User Guide
Creating a Monitor Mix . . . . . . . . . . . . . . . . . . . . 23
A640 Mix Views . . . . . . . . . . . . . . . . . . . . . . . . . . 23
D800 Sync Indicator . . . . . . . . . . . . . . . . . . . . . . 23
Common Editing Functions . . . . . . . . . . . . . . . . . . . . 24
Solo. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24
Additive Solo . . . . . . . . . . . . . . . . . . . . . . . . . 25
Mute . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26
Group . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27
Editing a Group . . . . . . . . . . . . . . . . . . . . . . . . 28
Editing in Channel View . . . . . . . . . . . . . . . . . . . . . . 31
Pan . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 31
Stereo Pan. . . . . . . . . . . . . . . . . . . . . . . . . . . 31
Tone Controls . . . . . . . . . . . . . . . . . . . . . . . . . . . 32
EFX . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 33
Editing in Mix View . . . . . . . . . . . . . . . . . . . . . . . . . 34
Editing in Names View . . . . . . . . . . . . . . . . . . . . . . . 36
Intercom Setup . . . . . . . . . . . . . . . . . . . . . . . . 38
Transmitting and Receiving Intercom Audio. . . . . . . . . . . . . 39
Transmitting Intercom Audio. . . . . . . . . . . . . . . . . . 39
Receiving Intercom Audio . . . . . . . . . . . . . . . . . . . 40
Intercom Modes . . . . . . . . . . . . . . . . . . . . . . . . . . 42
Momentary . . . . . . . . . . . . . . . . . . . . . . . . . . 42
Latched . . . . . . . . . . . . . . . . . . . . . . . . . . . . 42
How The Intercom Works . . . . . . . . . . . . . . . . . . . . . . 43
Using the Local Mic . . . . . . . . . . . . . . . . . . . . . . 43
Using an External Mic . . . . . . . . . . . . . . . . . . . . . 47
Using Multiple External Mics . . . . . . . . . . . . . . . . . . 48
Intercom Audio and Legacy Devices . . . . . . . . . . . . . . . . 48
A-16II Personal Mixer . . . . . . . . . . . . . . . . . . . . . 49
A320 Personal Mixer . . . . . . . . . . . . . . . . . . . . . 49
A360 Personal Mixer . . . . . . . . . . . . . . . . . . . . . . 49
Mixer Setup Menu. . . . . . . . . . . . . . . . . . . . . . . 50
File Transfer . . . . . . . . . . . . . . . . . . . . . . . . . . . . 51
USB Data Port . . . . . . . . . . . . . . . . . . . . . . . . . 52
Save a Configuration . . . . . . . . . . . . . . . . . . . . . 52
File Name Rules . . . . . . . . . . . . . . . . . . . . . . . . 54
Disk Full Warning . . . . . . . . . . . . . . . . . . . . . . . 54
Updating Configurations . . . . . . . . . . . . . . . . . . . 55
Recall a Configuration . . . . . . . . . . . . . . . . . . . . . 55
Import an A360 Configuration . . . . . . . . . . . . . . . . . 56
Check for A640 Firmware Updates . . . . . . . . . . . . . . . 58
Firmware Files . . . . . . . . . . . . . . . . . . . . . . . . . 58
Updating the A640 Firmware . . . . . . . . . . . . . . . . . 59
Edit Channel Names . . . . . . . . . . . . . . . . . . . . . . . . 60
Manual Edit . . . . . . . . . . . . . . . . . . . . . . . . . . 60
Channel Names Using Dante . . . . . . . . . . . . . . . . . . 61

Page 3Aviom A640 Personal Mixer User Guide
Loading Channel Names One Time from a D800-Dante . . . . . 62
Loading Dante Channel Names In Sync . . . . . . . . . . . . . 63
Dante Channel Names and Stereo Links . . . . . . . . . . . . 64
Restore Default Names . . . . . . . . . . . . . . . . . . . . 64
Mono vs. Stereo . . . . . . . . . . . . . . . . . . . . . . . . 67
Channel Mapping Errors . . . . . . . . . . . . . . . . . . . . 68
Disable an A640 Mix Channel Button . . . . . . . . . . . . . . 69
Aux Mix Audio Source . . . . . . . . . . . . . . . . . . . . . 71
Aux Mix Channel Settings . . . . . . . . . . . . . . . . . . . 71
Intercom Audio Source . . . . . . . . . . . . . . . . . . . . 73
Intercom Broadcast Slot . . . . . . . . . . . . . . . . . . . . 74
Legacy Devices . . . . . . . . . . . . . . . . . . . . . . . . 77
Getting Help . . . . . . . . . . . . . . . . . . . . . . . . . 78
Pro16 Mode - 16 mono channels . . . . . . . . . . . . . . . . 78
Default Mode - 16 stereo channels . . . . . . . . . . . . . . . 79
Mono vs. Stereo Channels . . . . . . . . . . . . . . . . . . . 80
Favorite Button . . . . . . . . . . . . . . . . . . . . . . . . 82
Custom Mode . . . . . . . . . . . . . . . . . . . . . . . . . 82
Input List . . . . . . . . . . . . . . . . . . . . . . . . . . . 83
Clear Current Mix. . . . . . . . . . . . . . . . . . . . . . . . . . 83
LCD Backlight Level . . . . . . . . . . . . . . . . . . . . . . . . 85
Help . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 86
Restore Defaults . . . . . . . . . . . . . . . . . . . . . . . . . . 87
About This Mixer . . . . . . . . . . . . . . . . . . . . . . . . . . 87
Personal Mixing System Setup . . . . . . . . . . . . . . . . 89
Adding the A640 to a 16-Channel System . . . . . . . . . . . . . 89
Daisy chaining an A640 . . . . . . . . . . . . . . . . . . . . 92
Pro16e Personal Mixing Systems . . . . . . . . . . . . . . . . . . 92
Analog Inputs . . . . . . . . . . . . . . . . . . . . . . . . . . . 92
Slot Range Setup . . . . . . . . . . . . . . . . . . . . . . . 93
Console Card Inputs . . . . . . . . . . . . . . . . . . . . . . . . 94
Connecting Monitoring Devices . . . . . . . . . . . . . . . . 95
Connecting to the Stereo Mix Output . . . . . . . . . . . . . . . . 95
Headphones and Earbuds . . . . . . . . . . . . . . . . . . . 95
Stereo Wireless In-Ear Systems . . . . . . . . . . . . . . . . . 96
Stereo Speakers . . . . . . . . . . . . . . . . . . . . . . . . 97
Mono Speakers . . . . . . . . . . . . . . . . . . . . . . . . 98
Subwoofers . . . . . . . . . . . . . . . . . . . . . . . . . 99
Tactile Shaker Devices . . . . . . . . . . . . . . . . . . . . . 100
Analog Cabling . . . . . . . . . . . . . . . . . . . . . . . . 102
Dante Patching . . . . . . . . . . . . . . . . . . . . . . . . 102
Network Channels (Slots) . . . . . . . . . . . . . . . . . . . 105
Input . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 105
Stereo . . . . . . . . . . . . . . . . . . . . . . . . . . . . 105

Page 4Aviom A640 Personal Mixer User Guide
Source . . . . . . . . . . . . . . . . . . . . . . . . . . . . 105
Network Channels (Slots) . . . . . . . . . . . . . . . . . . . 105
Input . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 105
Stereo . . . . . . . . . . . . . . . . . . . . . . . . . . . . 105
Source . . . . . . . . . . . . . . . . . . . . . . . . . . . . 105
Network Channels (Slots) . . . . . . . . . . . . . . . . . . . 105
Input . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 105
Stereo . . . . . . . . . . . . . . . . . . . . . . . . . . . . 105
Source . . . . . . . . . . . . . . . . . . . . . . . . . . . . 105
Network Channels (Slots) . . . . . . . . . . . . . . . . . . . 105
Input . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 105
Stereo . . . . . . . . . . . . . . . . . . . . . . . . . . . . 105
Source . . . . . . . . . . . . . . . . . . . . . . . . . . . . 105
Specications . . . . . . . . . . . . . . . . . . . . . . . . 106
Dimensions . . . . . . . . . . . . . . . . . . . . . . . . . . 107
Cat-5 Cable Pinout . . . . . . . . . . . . . . . . . . . . . . 109

Page 5Aviom A640 Personal Mixer User Guide
Features
The A640 Personal Mixer is part of Aviom’s Pro16® Series of products, powered by the high speed, low
latency A-Net® digital audio transport protocol. It can be combined with Pro16 and Pro16e™ analog
input devices, digital console cards, and/or Dante-based systems to create personal mixing systems
for applications in live performance, recording, broadcast, etc.
AmbienceIntercom
Save Recall
Signal/Clip Aux Volume Master Volume
Master EQ
Channel
Mix
Names
Trim All
View Mixer Setup
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 Favorite
A640 Personal Mixer
Thank you for purchasing the Aviom A640 Personal Mixer. This User Guide is
designed to familiarize you with your new product’s features and to have your
personal mixing system up and running as quickly as possible.

Page 6Aviom A640 Personal Mixer User Guide
A640 Personal Mixer features:
• Advanced 36-channel mix engine
• 16 mono or stereo standard mix channels
• Programmable channel selection from up to 64 sources in an Aviom network
• Three mixer modes allow the A640 to adapt to any size Aviom monitoring system
• Favorite Channel
• Ambience channel with onboard mic
• Color LCD
• Per-channel Volume, Treble, Bass, Eects, and Pan
• Three-band Master EQ with Enhance™, optimized for in-ear monitors
• Intercom function to communicate with other A640 users (requires a D800)
• 1/4-inch and 1/8-inch stereo outputs
• XLR mono Aux Mix output with custom channel selection
• 16 Mix Presets
• USB storage for saving and loading mixer presets and congurations
• Seamless integration with current and legacy Aviom personal mixing systems
Options for your personal mixing system include:
• MT-1a Mic Stand Mount
• Cat-5e/Cat-6 UTP interconnect cables
• PS-120/PS-240 Power Supply
Compatibility
The A640 Personal Mixer is compatible with Pro16 A-Net devices (maximum 16 source channels) and
Pro16e A-Net devices (up to 64 source channels) as detailed below.
The A-Net Out from the following devices may be connected to the A640 Personal Mixer’s A-Net In
port:
• AN-16/i v.2 Input Module
• Aviom16/o-Y1 A-Net Card for Yamaha® devices
• Third-Party Pro16 A-Net digital console cards
• D800 and D800-Dante A-Net Distributors
• D400 and D400-Dante A-Net Distributors
• AN-16/o v.4 Output Module
Legacy Products:
• AN-16/i Input Module
• AN-16/i-M Mic Input Module
• A-16D and A-16D Pro A-Net Distributors
• A-16II Personal Mixer
• A-16R Rack-mount Personal Mixer
• AN-16/o Output Module

Page 7Aviom A640 Personal Mixer User Guide
Power Supplies
The A640 Personal Mixer is designed to be connected to an Aviom A-Net Distributor such as the D800
or D400 when creating a personal mixing system. A-Net Distributors provide parallel A-Net digital
audio data connections for up to eight Personal Mixers as well as the DC power required to operate
them.
The A640 can also be powered with an optional DC power supply, the PS-120, which is a universal
switching type supply capable of working with voltages from 90 to 240 volts AC. The external power
supply is also available in international versions, sold as the PS-240.
Should you need to add or replace a power supply, we recommend using only a power supply that
meets the following specications.
Type Switching
Input Voltage 90-240 volts 50/60Hz 30VA
Output 24Vdc 0.5A
Polarity Outer = negative; Inner = positive
Plug Size 2 mm
Note that the polarity of the plug found on the DC power supply needs to match that of the power
supply specied to work with your Aviom equipment. Aviom products use a center positive power
supply. The outer contact of the 2mm plug is negative, the inner contact is positive.
About A-Net
A-Net® is a proprietary high-speed data transmission protocol developed by Aviom, capable of
sending and receiving high-quality digital audio using readily available Cat-5 cables.
A-Net is based on the physical layer of Ethernet, a Local Area Network (or LAN) technology. This
provides A-Net with a mature and robust base on which to build. However, it is important to note
that A-Net devices are not compatible with Ethernet devices.
Some of the benets of using A-Net to transmit digital audio are:
• Virtually no latency; analog in to analog out is always less than one millisecond
• No ground loops
• Easy cabling using readily available components
• An unlimited number of A-Net devices can be used in a system
• Ease in spanning long distances between system components
There are two versions of Pro16 A-Net: the original Pro16 A-Net signal carries sixteen channels of
digital data while the enhanced Pro16e® version of A-Net is capable of carrying up to 64 channels of
digital audio data. Like standard Pro16 A-Net, Pro16e is a point-to-point digital audio protocol.

Page 8Aviom A640 Personal Mixer User Guide
Conventions Used in this Document
Using Personal Mixers
When referring to the use of Aviom Personal Mixers in a personal mixing system in general, the term
Personal Mixer is used to describe a case where an A640 Personal Mixer, A360 Personal Mixer, A320
Personal Mixer, or A-16II Personal Mixer can be used.
Cat-5 Cables
In most cases unshielded Cat-5e, Cat-6, and Cat-6e UTP (Unshielded Twisted Pair) cables can be
interchanged. When speaking about interconnections between components in a system, the term
Cat-5 is used generically to indicate the use of any of the applicable cable types.
A-Net Distributors
The D800, D800-Dante, D400, D400-Dante, A-16D and A-16D Pro A-Net Distributors are referred to
generically as A-Net Distributors. A-Net Distributors are used to copy an A-Net digital signal and split it
into multiple copies so that Personal Mixers may be connected in parallel.
Button Presses
When instructed to press a specic button on the A640 Personal Mixer, a special font style is used. For
example, “Press the View button.”
Network Channels and Slots
An Aviom A-Net digital audio network can transport up to 64 audio sources to be used by the
Personal Mixers connected to it. Each of the 64 network channels in the A-Net network is referred
to as a Slot. Each of the 64 Slots in an A-Net network is always available whether audio has been
assigned to it or not. The terms network channel and Slot are used interchangeably in this document.

Page 9Aviom A640 Personal Mixer User Guide
A640 Front Panel Interface
The A640 Personal Mixer's front panel controls and features are described below.
AmbienceIntercom
Save Recall
Signal/Clip Aux Volume Master Volume
Master EQ
Channel
Mix
Names
Trim All
View Mixer Setup
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 Favorite
1
3
2
12
15
16
17
18
19
13
13
5
10 10
14
11
6
9
7 8
4
Function Function
1A-Net LED 11 Color Liquid Crystal Display (LCD)
2Signal/Clip LED 12 Intercom Button
3Save Button 13 Ambience Button & Built-in Ambience Mic
4Recall Button 14 Assignable Soft Buttons & Trim All function
5View Button 15 Channel Label Strip
6Mixer Setup Button 16 Channel Buttons
7Aux Volume 17 Channel Active LEDs
8Master Volume 18 Channel Mute LEDs
9Master EQ Button 19 Favorite Button
10 Left/Right Rotary Encoders

Page 10Aviom A640 Personal Mixer User Guide
A-Net LED
The A-Net LED lights whenever a valid digital Pro16 or Pro16e A-Net signal is connected to the A640.
When the legacy 16-channel Pro16 version of A-Net is connected, the A-Net LED lights green; when
the enhanced (up to) 64-channel Pro16e version of A-Net is connected, the A-Net LED lights blue.
Signal/Clip LED
The A640 includes custom circuitry to maximize mix headroom and minimize clipping in the digital
domain. A bi-color Signal/Clip LED is provided to help maintain a high delity, distortion-free mix.
The LED lights green under normal circumstances. As channel mix levels begin to increase, peaks
(especially those from percussive sources) will begin to light the red LED to indicate that some
clipping has started to occur.
When the red LED is on frequently, this is an indication that your mix headroom is being
compromised. Turning down the Master Volume knob will not reduce clipping or eliminate distortion
in this case; the Master Volume changes the output level after the digital mix has already been
created. The solution is to use the Trim All function which lowers all channel mix volumes uniformly.
Save Button
The A640 Personal Mixer can save and recall sixteen mix presets in its onboard memory. The A640's
sixteen mix channel buttons are used as the preset memory locations. Press the SaVe button
followed by one of the mix channel buttons 1-16 to save the current settings as a mix preset to that
location.
AmbienceIntercom
Save Recall
Signal/Clip
Aux Volume Master Volume
Master EQ
Channel
Mix
Names
Trim All
View
Mixer Setup
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 Favorite
Save and Recall buttons
Mix Presets 1-16 store the following information:
• Mixer Mode (Pro16, Default, or Custom)
• Settings for each channel:

Page 11Aviom A640 Personal Mixer User Guide
ཌྷVolume
ཌྷMute status
ཌྷPan for mono and stereo channels
ཌྷTreble boost amount
ཌྷBass boost amount
ཌྷEFX level
• Last selected channel 1-16, or 1-17 in Custom mode
• Which channel is mapped to the Favorite button (Pro16 and Default modes only)
• Master EQ Bass, Treble, and Enhance amounts
• Ambience On/O status
• Ambience volume
• Intercom Volume and audio source
• Aux Out source (Main Mix or Aux Mix)
• Aux Mix channel On/O selections
• Group 1-4 settings
• The last View screen displayed
• Current Stereo Link values for all 64 Slots from the A-Net network
Recall Button
The Rec all button is used to load one of the sixteen saved mix presets into memory. Press the
Recall button followed by the channel button that corresponds to the mix preset you wish to load.
The Mixer Mode (Pro16, Default, or Custom) saved within the preset must
match the current Mixer Mode in order to load the mix preset.
An error message is displayed if you attempt to load a mix preset whose settings do not match the
current Mixer Mode.
View Button
The A640’s built-in display can show your mix settings in one of three views—Channel View, Mix
View, or Names View.
AmbienceIntercom
Save Recall
Signal/Clip Aux Volume Master Volume
Master EQ
Channel
Mix
Names
Trim All
View Mixer Setup
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 Favorite

Page 12Aviom A640 Personal Mixer User Guide
Cycle through the three views at any time while mixing by pressing the dedicated View button found
above the display.
(L/R) Channel, Mix, and Names views
See "A640 Mix Views" on page 23 for a detailed explanation of the Views and their features.
Mixer Setup Button
Pressing the dedicated MixeR Setup button at the top of the A640 interface opens the Mixer Setup
menu which provides access to the A640 Personal Mixer’s customizable settings and storage options.
Each function in the list contains a Help page that provides a brief overview of the selected function’s
operation.
See "Mixer Setup Menu" on page 50 for complete information on all the functions and settings
available in the Mixer Setup menu.
Aux Volume
In addition to the stereo mix output, the A640 automatically generates a balanced line-level mono
mix that makes connecting a subwoofer, bass shaker, or powered speaker easy. The aux VoluMe
knob controls the level of the mono mix being sent to the Aux Out XLR jack on the rear panel.
The Aux Volume level is not saved in a mix preset or conguration.

Page 13Aviom A640 Personal Mixer User Guide
AmbienceIntercom
Save Recall
Signal/Clip
Aux Volume Master Volume
Master EQ
Channel
Mix
Names
Trim All
View
Mixer Setup
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 Favorite
Aux Volume, Master Volume, and Master EQ
You can choose between using the mono version of the main mix or a customized set of channels.
See page 71 to learn more about setting up and using the Aux Mix.
Master Volume
The MaSteR VoluMe knob controls the stereo mix level heard when using headphones or earbuds
connected to the A640's rear-panel 1/4- or 1/8-inch output jacks. The Master Volume is independent
of the Aux Volume. Its volume level is not saved in a mix preset or conguration.
Master EQ Button
The A640 Personal Mixer includes a global Master EQ section that is applied to the stereo mix being
sent to the 1/4-inch and 1/8-inch stereo headphone outputs as well as the XLR mono Aux Mix output
on the rear panel of the A640. Press the MaSteR eQ button to access its settings.
The A640 Master EQ section

Page 14Aviom A640 Personal Mixer User Guide
Press either encoder button to scroll to the Treble, Bass, or Enhance settings. Then turn the encoder
to change the amount. The Treble and Bass controls oer boost or cut. Scroll to the left of the center
indicator (the default setting) for a Treble or Bass cut; scroll to the right for a boost.
The Enhance circuit is a specially designed boost-only feature that adds a simultaneous bass and
treble boost at varying amounts as you increase its level. Its specially designed EQ curve is ideal for
in-ear monitoring. The default setting for Enhance is fully left (o). The settings for the Master EQ will
save with each mix preset created on the A640.
To return the Treble, Bass, and Enhance controls to their default values, press the ReSet button.
Color LCD
The central LCD (Liquid Crystal Display) shows the current mix in one of three Views. The LCD is also
used with the Master EQ and when setting up the A640 Personal Mixer using the options in the Mixer
Setup window.
AmbienceIntercom
Save Recall
Signal/Clip Aux Volume Master Volume
Master EQ
Channel
Mix
Names
Trim All
View Mixer Setup
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 Favorite
Color LCD as seen in Channel View
Left/Right Rotary Encoders
Two rotary encoders with push button switches are found on either side of the display. The encoders
are used for creating and editing a monitor mix, setting up an Aux Mix, creating a custom channel
map, setting up preferences in the Mixer Setup window, etc.