Yamaha EMX640 User Manual

POWERED MIXER
E
Owner’s Manual
Contents
Front and rear panel ............................................ 2
Control panel .......................................................... 2
Input/output panel .................................................. 6
Rear panel .............................................................. 7
Connections ......................................................... 8
Basic Operation ................................................... 9
Connecting microphones and instruments ............ 9
Using the digital effect ............................................ 9
Example setups ................................................. 10
As a conference PA system/installed sound system 10
As a band PA ........................................................ 11
Specifications..................................................... 13
General specifications .......................................... 13
Input specifications............................................... 14
Output specifications ............................................ 14
Dimensions........................................................... 15
Block and Level diagram ...................................... 15
maintenance to qualified Yamaha service personnel. Opening
the case and/or tampering with the internal circuitry voids
the warranty.
5. Always power off before making connections
Always turn the power OFF before connecting or
disconnecting cables. This is important to prevent damage to
the unit itself as well as other connected equipment.
6. Handle cables carefully
Always plug and unplug cables — including the AC power
cord — by gripping the connector, not the cord.
7. Clean with a soft dry cloth
Never use solvents such as benzine or thinner to clean the
unit. Wipe clean with a soft, dry cloth.
8. Always use the correct power supply
Make sure that the power supply voltage specified on the rear
panel matches your local AC mains supply. Also make sure
that the AC mains supply can deliver more than enough
current to handle all equipment used in your system.
9. Do not touch the heatsink when the EMX640 is in use.
It can get very hot.
Precautions
1. Avoid excessive heat, humidity, dust and vibration
Keep the unit away from locations where it is likely to be
exposed to high temperatures or humidity — such as near
radiators, stoves, etc. Also avoid locations which are subject
to excessive dust accumulation or vibration which could
cause mechanical damage.
2. Ventilation
Allow a distance of 30 cm between the unit and the wall so
that heat generated from the unit will be released effectively.
Also, allow enough space between the unit and other devices.
If you mount the unit in an audio rack, keep a space of 40
cm on the top panel, and a space of 15 cm to the side panel.
Remove the rear panel of the rack or open a vent hole. If heat
release is inadequate, the unit will retain heat inside the unit,
which may cause a fire.
3. Avoid physical shocks
Strong physical shocks to the unit can cause damage. Handle
it with care.
4. Do not open the case or attempt repairs or modifications
yourself
This product contains no user-serviceable parts. Refer all
Features
• Six input channels compatible with mic/line signals are
provided. The EMX640 has ample power, with a maximum
output of 200 W+200 W (400 W with bridge connection),
and is suitable for a wide range of applications from installed
systems to small-scale PA systems.
• A two-channel power amp is built-in. The input signals for
the two channels can be selected as MAIN+MAIN,
MAIN+MONITOR, or MAIN (bridge connection).
• Independent 7-band graphic EQ is provided for both the
MONITOR section and the MAIN section. This allows the
volume and frequency response to be adjusted separately for
the main speakers and monitor speakers.
• Two limiter circuits are built-in to prevent excessive input
levels to the amp.
• A digital effect with three selectable effect types is built-in.
A variety of effects can be applied to add reverberation or
ambiance to vocals or instrumental sounds.
Introduction
Thank you for purchasing the Yamaha EMX640 Powered Mixer. The EMX640 has the following features.
In order to take full advantage of the EMX640 and enjoy long and trouble-free performance, please read this
owner’s manual carefully, and keep it in a safe place for future reference.

Yamaha EMX640 Specifications

General

Power Output	200W + 200W (4 ohms)
Effects	Yes
Phantom Power	Yes
Type	Powered Mixer
Mono Channels	4
Stereo Channels	2
Aux Sends	1
Input Types	XLR
Equalizer	3-band
Effects Type	Digital
Amplifier Power	200W + 200W

Summary

Safety and Handling Precautions

Safety and Environmental Handling

Covers heat, humidity, dust, vibration, physical shocks, and internal modifications.

Connection, Maintenance, and Cleaning

Emphasizes powering off before connections, careful cable handling, and cleaning procedures.

Power Supply and Operational Safety

Use correct power supply and avoid touching hot heatsink during operation.

Control Panel: Channel Section

Equalizer, Monitor, and Effect Controls

Adjusts EQ, MONI, and EFFECT levels for each input channel.

Level and Pad Controls

Adjusts channel output level and attenuates input signal by 30 dB.

Digital Effect and Effect Output Controls

Digital Effect Section Controls

Controls for turning the built-in digital effect on/off and selecting effect types (Vocal, L Hall, S Hall).

Effect Send/Return Adjustments

Adjusts signal level sent to the built-in effect and external effect devices via EFFECT RTN.

Monitor and Main Section Controls

Monitor Section Operation

Adjusts tone and volume of MONITOR bus, and specifies mix level of built-in effect.

Main Section Operation

Adjusts tone and volume of MAIN bus, effect, and external input levels.

Graphic Equalizer Functionality

7-band graphic EQ for adjusting frequency response of MONITOR and MAIN bus signals.

Power Amplifier and Indicators

Power Amplifier Section

Selects signals for the two-channel power amplifier and the BRIDGE mode.

Limiter and Power Indicators

Explains the LIMITER indicator, POWER indicator, and PHANTOM +48V switch.

Input/Output Panel Details

Channel Input Jack Configurations

Details Hi-Z, Lo-Z, MIC/LINE input jacks for channels 1-6, including PAD switch and phantom power.

Effect and Foot Switch Jacks

Describes the EFFECT OUT jack for external effects and the FOOT SW jack for effect control.

External Input Jacks (AUX/TAPE)

Input jacks for adding external device signals to the MAIN output.

Rear Panel Connections

Speaker Output Jack Configuration

Details connections for POWER AMP 1/2 A/B and BRIDGE jacks, including impedance requirements.

Power Switch Operation

Location and function of the main power ON/OFF switch for the unit.

Speaker and Example Connections

Speaker Connection Methods

Explains three ways to connect speakers to POWER AMP 1/2 and BRIDGE jacks with impedance requirements.

Example Connection Diagrams

Illustrates typical connections for microphones, instruments, and playback devices.

Basic Operation Guide

Connecting Microphones and Instruments

Step-by-step guide for connecting and setting up microphones and instruments.

Using the Built-in Digital Effect

Instructions on applying and adjusting the digital effect for vocals and instruments.

Conference PA System Setup

Conference System Connections

Details connecting microphones, CD players, and cassette decks for a conference setup.

CD Player Playback Operation

Steps for playing back audio from a CD player, including power sequence and level adjustments.

Band PA System Setup

Band PA System Connections

Connects microphones, instruments, keyboards, and external effects for a band setup.

Monitor Mix and External Effects

Instructions for sending independent monitor mixes and using external effects in a band setup.

Advanced Operation Examples

Sending Independent Monitor Mix

Guides on creating an independent mix for monitor speakers using MONI and MASTER controls.

Using External Effects

Instructions for routing and adjusting signals through external effect processors.

General Specifications

Output Power and Frequency Response

Details maximum output power, frequency response, and total harmonic distortion.

Noise, Gain, and Crosstalk

Specifies hum/noise levels, maximum voltage gain, and crosstalk at 1 kHz.

Equalization, Effects, and Phantom Power

Covers input channel equalization, graphic EQ, digital effect types, and phantom power supply.

Input and Output Specifications

Input Connector Specifications

Details sensitivity, nominal level, and clipping levels for various input connectors.

Output Connector Specifications

Details nominal output levels and clipping levels for output connectors like POWER AMP, MAIN, MONITOR, etc.

Dimensions and Diagrams

Unit Dimensions

Provides the physical dimensions (width, height, depth) of the EMX640 unit.

Block and Level Diagram

Illustrates the internal signal flow and level characteristics of the EMX640.

Regulatory Information

FCC Information (U.S.A.)

Notice regarding FCC compliance, modifications, and shielded cables for US users.

Mains Lead Wiring Warning

Important safety warning regarding mains lead wire colours and terminal connections.