Yamaha IMX644 User Manual

Owner's Manual

EN

Explanation of Graphical Symbols

The lightning flash with arrowhead symbol

CAUTION

within an equilateral triangle is intended to
alert the user to the presence of uninsulated

RISK OF ELECTRIC SHOCK

DO NOT OPEN

“dangerous voltage” within the product’s
enclosure that may be of sufficient magnitude
to constitute a risk of electric shock to
persons.

CAUTION: TO REDUCE THE RISK OF

ELECTRIC SHOCK, DO NOT REMOVE

COVER (OR BACK). NO USER-SERVICEABLE

PARTS INSIDE. REFER SERVICING TO

QUALIFIED SERVICE PERSONNEL.

The exclamation point within an equilateral
triangle is intended to alert the user to the
presence of important operating and
maintenance (servicing) instructions in the
literature accompanying the product.

The above warning is located on the top of the unit.

IMPORTANT SAFETY INSTRUCTIONS

1 Read these instructions.
2Keep these instructions.
3 Heed all warnings.
4 Follow all instructions.
5 Do not use this apparatus near water.
6 Clean only with 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 the third prong are provided
for your safety. If the provided plug does not fit into
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 from 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 service personnel.

Servicing is required when the apparatus has been
damaged in any way, such as 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.

WARNING

TO REDUCE THE RISK OF FIRE OR ELECTRIC SHOCK, DO NOT EXPOSE THIS APPARATUS TO RAIN OR MOISTURE.

(UL60065_03)

FCC INFORMATION (U.S.A.)

1. IMPORTANT NOTICE: DO NOT MODIFY THIS UNIT!

This product, when installed as indicated in the instructions con­tained in this manual, meets FCC requirements. Modifications not
expressly approved by Yamaha may void your authority, granted by
the FCC, to use the product.

2. IMPORTANT:

or another product use only high quality shielded cables. Cable/s
supplied with this product MUST be used. Follow all installation
instructions. Failure to follow instructions could void your FCC
authorization to use this product in the USA.

3. NOTE:

requirements listed in FCC Regulations, Part 15 for Class “B” digital
devices. Compliance with these requirements provides a reason­able level of assurance that your use of this product in a residential
environment will not result in harmful interference with other elec­tronic devices. This equipment generates/uses radio frequencies
and, if not installed and used according to the instructions found in
the users manual, may cause interference harmful to the operation
of other electronic devices. Compliance with FCC regulations does

* This applies only to products distributed by YAMAHA CORPORATION OF AMERICA. (class B)

When connecting this product to accessories and/

This product has been tested and found to comply with the

not guarantee that interference will not occur in all installations. If
this product is found to be the source of interference, which can be
determined by turning the unit “OFF” and “ON”, please try to elimi­nate the problem by using one of the following measures:

Relocate either this product or the device that is being affected by
the interference.

Utilize power outlets that are on different branch (circuit breaker or
fuse) circuits or install AC line filter/s.

In the case of radio or TV interference, relocate/reorient the
antenna. If the antenna lead-in is 300 ohm ribbon lead, change the
lead-in to co-axial type cable.

If these corrective measures do not produce satisfactory results,
please contact the local retailer authorized to distribute this type of
product. If you can not locate the appropriate retailer, please con­tact Yamaha Corporation of America, Electronic Service Division,
6600 Orangethorpe Ave, Buena Park, CA90620

The above statements apply ONLY to those products distributed by
Yamaha Corporation of America or its subsidiaries.

PRECAUTIONS

PLEASE READ CAREFULLY BEFORE PROCEEDING

* Please keep this manual in a safe place for future reference.

WARNING

Always follow the basic precautions listed below to avoid the possibility of serious injury or even death from electrical
shock, short-circuiting, damages, fire or other hazards. These precautions include, but are not limited to, the following:

Power supply/Power cord

• Only use the voltage specified as correct for the device. The required voltage is
printed on the name plate of the device.

• Use only the included power cord.
If you intend to use the device in an area other than in the one you purchased,
the included power cord may not be compatible. Please check with your Yamaha
dealer.

• Do not place the power cord near heat sources such as heaters or radiators, and
do not excessively bend or otherwise damage the cord, place heavy objects on
it, or place it in a position where anyone could walk on, trip over, or roll anything
over it.

• Be sure to connect to an appropriate outlet with a protective grounding
connection. Improper grounding can result in electrical shock.

Do not open

• Do not open the device or attempt to disassemble the internal parts or modify
them in any way. The device contains no user-serviceable parts. If it should
appear to be malfunctioning, discontinue use immediately and have it inspected
by qualified Yamaha service personnel.

CAUTION

Water warning

• Do not expose the device to dripping or splashing, use it near water or in damp
or wet conditions, or place containers on it containing liquids which might spill
into any openings. If any liquid such as water seeps into the device, turn off the
power immediately and unplug the power cord from the AC outlet. Then have
the device inspected by qualified Yamaha service personnel.

• Never insert or remove an electric plug with wet hands.

If you notice any abnormality

• If the power cord or plug becomes frayed or damaged, or if there is a sudden
loss of sound during use of the device, or if any unusual smells or smoke
should appear to be caused by it, immediately turn off the power switch,
disconnect the electric plug from the outlet, and have the device inspected by
qualified Yamaha service personnel.

• If this device should be dropped or damaged, immediately turn off the power
switch, disconnect the electric plug from the outlet, and have the device
inspected by qualified Yamaha service personnel.

Always follow the basic precautions listed below to avoid the possibility of physical injury to you or others, or damage
to the device or other property. These precautions include, but are not limited to, the following:

Power supply/Power cord

• Remove the electric plug from the outlet when the device is not to be used for
extended periods of time, or during electrical storms.

• When removing the electric plug from the device or an outlet, always hold the
plug itself and not the cord. Pulling by the cord can damage it.

Location

• Before moving the device, remove all connected cables.

• When setting up the devices, make sure that the power switch can be easily
turned ON/OFF. If some trouble or malfunction occurs, immediately turn off the
power switch and disconnect the plug from the outlet.

• If the device is mounted in an EIA standard rack, carefully read the section
“Precautions for Rack Mounting” on page 7. Inadequate ventilation can result in
overheating, possibly causing damage to the device(s), malfunction, or even
fire.

•Avoid setting all equalizer controls and faders to their maximum. Depending on
the condition of the connected devices, doing so may cause feedback and may
damage the speakers.

• Do not expose the device to excessive dust or vibrations, or extreme cold or heat
(such as in direct sunlight, near a heater, or in a car during the day) to prevent
the possibility of panel disfiguration or damage to the internal components.

• Do not place the device in an unstable position where it might accidentally fall
over.

• Do not block the vents. This device has ventilation holes at the sides to prevent
the internal temperature from becoming too high. In particular, do not place the
device on its side or upside down. Inadequate ventilation can result in
overheating, possibly causing damage to the device(s), or even fire.

• Do not use the device in the vicinity of a TV, radio, stereo equipment, mobile
phone, or other electric devices. Doing so may result in noise, both in the device
itself and in the TV or radio next to it.

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IMX644 Owner’s Manual

3

Connections Handling caution

• Before connecting the device to other devices, turn off the power for all devices.
Before turning the power on or off for all devices, set all volume levels to
minimum.

• The included power cable has a three-conductor plug, so if the AC outlet is
grounded the IMX644 will be grounded appropriately.

• When turning on the AC power in your audio system, always turn on the power
amplifier LAST, to avoid speaker damage. When turning the power off, the power
amplifier should be turned off FIRST for the same reason.

• Condensation can occur in the device due to rapid, drastic changes in ambient
temperature – when the device is moved from one location to another, or air
conditioning is turned on or off, for example. Using the device while
condensation is present can cause damage. If there is reason to believe that
condensation might have occurred, leave the device for several hours without
turning on the power until the condensation has completely dried out.

• Do not insert your fingers or hands in any gaps or openings on the device
(ports, etc.).

•Avoid inserting or dropping foreign objects (paper, plastic, metal, etc.) into any
gaps or openings on the device (ports, etc.) If this happens, turn off the power
immediately and unplug the power cord from the AC outlet. Then have the
device inspected by qualified Yamaha service personnel.

• Do not apply oil, grease, or contact cleaner to the faders. Doing so may cause
problems with electrical contact or fader motion.

• Do not rest your weight on the device or place heavy objects on it, and avoid use
excessive force on the buttons, switches or connectors.

Yamaha cannot be held responsible for damage caused by improper use or modifications to the device, or data that is lost or destroyed.

Always turn the power off when the device is not in use.

The performance of components with moving contacts, such as switches, volume controls, and connectors, deteriorates over time. Consult qualified Yamaha service
personnel about replacing defective components.

European models
Purchaser/User Information specified in EN55103-1 and EN55103-2.
Inrush Current: 10 A
Conforms to Environments: E1, E2 E3 and E4

SPECIAL NOTICES

• The illustrations as shown in this manual are for instructional purposes only, and may appear somewhat different from those on your device.

• The company names and product names in this manual are the trademarks or registered trademarks of their respective companies.

• Specifications and descriptions in this owner’s manual are for information purposes only. Yamaha Corp. reserves the right to change or modify products or specifications
at any time without prior notice. Since specifications, equipment or options may not be the same in every locale, please check with your Yamaha dealer.

COMPLIANCE INFORMATION STATEMENT

(DECLARATION OF CONFORMITY PROCEDURE)

Responsible Party : Yamaha Corporation of America

Address : 6600 Orangethorpe Ave., Buena Park, Calif. 90620

Telephone : [phone]

Type of Equipment : DIGITAL INSTALLATION MIXER

Model Name : IMX644

This device complies with Part 15 of the FCC Rules.
Operation is subject to the following two conditions:

1) this device may not cause harmful interference, and

2) this device must accept any interference received including interfer­ence that may cause undesired operation.

See user manual instructions if interference to radio reception is sus­pected.

* This applies only to products distributed by

YAMAHA CORPORATION OF AMERICA.

(FCC DoC)

IMPORTANT NOTICE FOR THE UNITED KINGDOM

Connecting the Plug and Cord

WARNING: THIS APPARATUS MUST BE EARTHED

IMPORTANT. The wires in this mains lead are coloured in accor­dance with the following code:

GREEN-AND-YELLOW : EARTH
BLUE : NEUTRAL

BROWN : LIVE
As the colours of the wires in the mains lead of this apparatus 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 by the letter E or
by the safety earth symbol or colored GREEN or GREEN-and­YELLOW.

The wire which is coloured BLUE must be connected to the terminal
which is marked with the letter N or coloured BLACK.

The wire which is coloured BROWN must be connected to the termi­nal which is marked with the letter L or coloured RED.

IMX644 Owner’s Manual

4

(5)-6

• This applies only to products distributed by Yamaha Music U.K. Ltd. (3 wires)

2/2

Table of contents

Introduction

Controls and Functions

Connections

Mix Functions

Appendix

Features ............................................................................... 6

Precautions for Rack Mounting ............................................ 7

Before Operation .................................................................. 7

Acquiring the IMX644 Manager Software and Manuals ....... 7

Front Panel ........................................................................... 8

Rear Panel.......................................................................... 10

System Example................................................................. 12

Connectors and Cables ...................................................... 13

Input Channels ................................................................... 15

Output Channels................................................................. 17

Others................................................................................. 17

Troubleshooting.................................................................. 18

Memory Initialization........................................................... 18

IMX644 Status List ............................................................. 19

Remote Control Protocol Specifications ............................. 20

General Specifications........................................................ 21

Input/output Characteristics................................................ 21

Electrical Characteristics .................................................... 22

GPI Circuit Example ........................................................... 23

Dimensions......................................................................... 24

Block Diagram .................................................................... 25

IMX644 Owner’s Manual

5

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Introduction

Thank you for purchasing the Yamaha IMX644 Digital Installation Mixer. In order to take full
advantage of the IMX644 functionality and to ensure trouble-free operation, please read this
owner’s manual carefully before use. After you have read the manual, keep it in a safe place
for reference when needed.

Features

Versatile Input/Output Configuration

The IMX644 features an input/output configuration that is ideal
for a wide range of applications: six mono inputs, four stereo in­puts, two stereo outputs, two mono outputs, and one dedicated
stereo output for recording.

16 Memories

Up to 16 sets of mixer settings can be stored in memory and in­stantly recalled as required. Four of the memories can be directly
recalled via front-panel MEMORY [A] through [D] buttons.

Optical Digital I/O

Connecting to compatible devices (CD and DVD players, for ex­ample) via the optical digital interface allows accurate signal
transfer with no loss of signal quality. The digital input features
a built-in sample rate converter, so there is no need for word
clock synchronization.

Powerful Mixing Features

•Parametric EQ

Parametric equalization is provided on all input channels: 3­band EQ on mono input channels, and 2-band EQ on stereo
input channels.
6-band EQ is provided on all outputs except the recording
output.

• Feedback Suppressor

Feedback suppression is provided on all six mono input
channels.
The Feedback Suppressor provides two stages of feedback
prevention: static filters that can be set in advance, and
dynamic filters that self-adjust in real time to control feed­back.

• Priority for Specified Voice or Music Sources

The Priority Ducker automatically “ducks” (reduces the vol­ume of) the background when a signal is applied to a speci­fied mono input channel, making announcements stand out
for greater intelligibility. All stereo inputs assigned to the
same output channel are reduced to a specified level when
priority input is detected.
Music Override gives priority to a music source applied to a
specified stereo input channel. All other stereo inputs
assigned to the same output channel are muted when prior­ity input is detected.

• Delay

Precise delays can be applied to all outputs to allow time
alignment for a solid sonic image with clear imaging and
optimum overall sound quality throughout the listening
area.

Accessories

•AC power cord

• Rubber feet x 4

• Euroblock plug (3P) x 12

• Owner’s Manual (this document)

IMX644 Owner’s Manual

6

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Introduction

Precautions for Rack Mounting

This unit will operate stably in an environmental temperature of
0–40˚C. If you install this device together with multiple units of
the same device or other devices in an EIA standard rack, the
heat produced by the various devices may raise the ambient tem­perature inside the rack, resulting in inefficient performance. To
ensure that the heat produced by this device can be dissipated ap­propriately, please ensure the following conditions when rack­mounting it.

• If multiple units are mounted in the same rack, leave a 1U
rack space between every two units. Also either leave the
open spaces uncovered or install appropriate ventilating
panels to minimize the possibility of heat buildup.

• When mounting this device together with other heat-pro­ducing equipment such as power amplifiers, leave 1U or
more space between it and other devices. Install a ventila­tion panel in this vacant space or leave it open to ensure ade­quate cooling.

•To ensure sufficient airflow, leave the rear of the rack open
and position it at least 10 centimeters from walls or other
surfaces. If the rear of the rack can’t be left open, install a
commercially available fan or similar ventilating option to
secure sufficient airflow. If you’ve installed a fan kit, there
may be cases in which closing the rear of the rack will pro­duce a greater cooling effect. Refer to the rack and/or fan
unit manual for details.

Before Operation

Connecting the AC Power Cable

CAUTION

• Before connecting the power cable, make sure that the power
switches of all devices are turned OFF.

First connect the supplied power cable to the [AC IN] socket on
the rear panel of the IMX644, then connect the AC plug to an ap­propriate AC power outlet (make sure the local supply voltage
matches the rated AC voltage of the unit).

Powering ON or OFF

CAUTION

•To prevent loud noise bursts from the speakers when power­ing up the system, turn devices ON in the following order:
audio sources (microphones, CD players, etc.), IMX644, and
finally power amplifiers. Reverse this order when turning the
system off.

1

Press the [ON] end of the [POWER] switch to

turn the unit ON.

Press the [OFF] end of the [POWER] switch to

2

turn the unit OFF.

CAUTION

• Rapidly turning the unit ON and OFF in succession can
cause it to malfunction. After turning the unit OFF, wait for
more than 6 seconds before turning it ON again.

Acquiring the IMX644 Manager Software and Manuals

The information in this manual deals primarily with setting up
and operating the IMX644 hardware.
For detailed parameter control the IMX644 Manager software
application is required. The IMX644 Manager software and
manuals can be downloaded from Yamaha’s professional audio
website (URL below).
http://www.yamahaproaudio.com/

The available IMX644 Manager documents are as follows:

• IMX644 Manager Owner’s Manual

This manual contains detailed information relating to the
IMX644 unit and IMX644 Manager software.

IMX644 Owner’s Manual

7

Controls and Functions

Front Panel

13

578 !42 #

1 [LOCK] Switch and Indicator

The [LOCK] switch can be used to “lock” the panel level knobs
(5, 8, and 11), making them inoperable and preventing acciden­tal changes. After setting levels and/or recalling a memory as re­quired, press the [LOCK] switch with a thin object (such as the
tip of a pen) to prevent further changes to the level settings. The
LOCK indicator lights red when the controls are locked.
Press the [LOCK] switch a second time to unlock the controls
and allow normal operation of the level knobs.

NOTE

• The LOCK buttons in the IMX644 Manager application
INPUT display can be used to enable independent operation
of each panel level control.

• If the settings of the level knobs have been increased since
the [LOCK] switch was engaged, the settings at the time the
[LOCK] switch was engaged will be retained when it is
disengaged. In order to increase a level setting after
disengaging the [LOCK] switch in such a case it is necessary
to lower the setting of the knob to the point at which it was
locked, and then raise the level as required.

• When the power is turned ON, the MEMORY number that
was active when the power was turned OFF is recalled. Save
the memory using the IMX644 Manager application before
engaging the [LOCK] switch.

• The LOCK function is temporarily disengaged when the
IMX644 Manager application goes online. The LOCK
function will be re-engaged if the unit is restarted, so don’t
operate the [LOCK] switch while the IMX644 Manager is
online.

69)@

2 [USB] Connector

The computer running the IMX644 Manager application can be
connected to the IMX644 via this connector. The [USB] connec­tor cannot be used at the same time as the rear-panel [REMOTE]
connector.

Precautions when using the [USB] connector

When connecting the computer to the [USB] connector,
make sure to observe the following points. Failing to do so
risks freezing the computer and corrupting or losing the data.
If the computer or the device freezes, restart the application
software or the computer OS, or turn the power to the device
off then on again.

CAUTION

• Use an AB type USB cable of less than about 3 meters.

• Before connecting the computer to the [USB] connector,
exit from any power-saving mode of the computer (such
as suspend, sleep, standby).

• Before turning on the power to the device, connect the
computer to the [USB] connector.

•Execute the following before turning the power to the
device on/off or plugging/unplugging the USB cable to/
from the [USB] connector.

- Quit any open application software on the computer.

- Make sure that data is not being transmitted from the

device.

• While the computer is connected to the device, you
should wait for six seconds or more between these
operations: (1) when turning the power of the device off
then on again, or (2) when alternately connecting/
disconnecting the USB cable.

IMX644 Owner’s Manual

8

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Controls and Functions

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MONO INPUT Section

3 Matrix Indicators

The outputs to which each mono input are assigned are displayed
by orange indicators.

4 [SIGNAL/PEAK] Indicators

These indicators light green when a signal is detected at the cor­responding mono input.
The [SIGNAL/PEAK] indicators also light red to indicate exces­sive input level at the corresponding input. If excessive input
level is indicated either reduce the output level of the connected
source, or reduce the IMX644 input sensitivity via the appropri­ate rear-panel [PAD] switch or by reducing the [INPUT GAIN]
setting via the IMX644 Manager application.

5 Level Knobs

These knobs adjust the input level of the corresponding mono
channels.

STEREO INPUT Section

6 Matrix Indicators

The outputs to which each stereo input are assigned are dis­played by orange indicators.

7 [SIGNAL/PEAK] Indicators

These indicators light green when a signal is detected at the cor­responding stereo input.
The [SIGNAL/PEAK] indicators also light red to indicate exces­sive input level at the corresponding input. If excessive input
level is indicated, reduce the output level of the connected
source.

NOTE

• The [SIGNAL/PEAK] indicator may light red when certain
types of signals are received via the OPTICAL input, but in
such cases the signal is within range and no further adjust­ments are required.

8 Level Knobs

These knobs adjust the input level of the corresponding stereo
channels.

OUTPUT Section

9 Level Meter

Displays the levels of the signal being output via OUTPUT 1 and

2.
If the PEAK indicator lights the output level is too high. If exces­sively high output levels are indicated, reduce the input and/or
output levels as required.

NOTE

• The signals OUTPUT 1 and 2 are both stereo pairs, so each
level meter indicates the output level of the mixed L and R
signal.

) [SIGNAL/PEAK] Indicators

These indicators light green when a signal is detected at
OUTPUT 3 and 4.
The [SIGNAL/PEAK] indicators also light red to indicate exces­sive output level at the corresponding output. If excessive output
level is indicated, reduce the input level or output level.

! Level Knobs

These knobs adjust the output level from the corresponding out­put channels.

@ MEMORY [A] – [D] Buttons

• Recalling Memories

To recall a memory press and hold one of the MEMORY
buttons for about 2 seconds – the button’s indicator will
light and the mix settings assigned to that memory will be
recalled.
Settings are stored in the IMX644 memories via the
IMX644 Manager application. Memories A through D all
contain the same settings when the unit is initially shipped
from the factory.

• Switching Modes

To start the unit in IMX644 Manager mode, hold the MEM­ORY [D] button while turning the [POWER] switch ON.
The unit starts up in the “normal” mode if the power is
turned on while the MEMORY [D] button is not held.

This mode allows communication with

IMX644

Manager Mode

Normal Mode

the IMX644 application. Communica­tion with AMX and similar external
controllers cannot occur in this mode.

This is the unit’s normal operating
mode. Communication with AMX and
similar external controllers is also pos­sible in this mode. Communication
with the IMX644 Manager application
is not possible in this mode.

# [POWER] Switch & Indicator

Turns power to the unit ON or OFF. The indicator lights green
when the power is ON.

NOTE

• Since the level settings for each channel are stored in the
IMX644 unit itself, be sure that the IMX644 Manager applica­tion is online when setting up the memories.

IMX644 Owner’s Manual

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