EMX88S - Digital Mixer YAMAHA - Free user manual and instructions

USER MANUAL EMX88S YAMAHA

The Owner's Manual Revisions

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Thank you for purchasing the Yamaha EMX88S/EMX68S Powered Mixer. Parts of the EMX88S, EMX68S owner's manual have been revised. Please refer to the following revisions rather than the corresponding sections of the original owner's manual.

P.12

MAIN section

16 Level Meter

This LED display shows the level of signals received at the MAIN (STEREO) jack (input/output panel ⑦).

Note: The SPEAKERS 1 & 2 jacks (rear panel ①) output the signals received at the MAIN OUT jack via the internal power amplifier. Check the output signal level via the LIMITER indicator (②).

■ MONITOR section

Level Meter

This LED display shows the level of signals received at the MONITOR OUT jack (input/output panel ⑦).

Note: The SPEAKERS 1 & 2 jacks (rear panel ① ) output the signals received at the MONITOR OUT jack via the internal power amplifier. Check the output signal level via the LIMITER indicator (②) .

P.13

■ POWER AMP section

23 LIMITERindicator

If the output level of signals received at the SPEAKERS output jacks (output of the internal power amplifier) reaches maximum, the indicator will light.

Caution: If the LIMITER indicator flashes continuously, the internal power amplifier section is being excessively overloaded and may malfunction. Reduce the output level at the Master controls (1520) below the level that the indicator flashes only briefly on the highest transient peaks.

P.30

■ Block and Level diagram

Power Amplifier output section level diagram (bottom right)

These plots show the nominal output and maximum output levels of signals received at the SPEAKERS jacks. If the output level is +4dB (Level Meter "0"), the internal power amplifier will deliver 80W into a 4 load. If the output level is +11dB (LIMITER indicator lights), the internal amplifier will deliver a maximum of 400W into a 4 load. If you are using the BRIDGE jack, the internal power amplifier will deliver 160W into an 8 load with a +4dB signal and a maximum of 800W into an 8 load with a +11dB signal.

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: When connecting this product to accessories and/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: This product has been tested and found to comply with the 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 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 coaxial 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, CA 90620

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

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

- Explanation of Graphical Symbols

The lightning flash with arrowhead symbol within an equilateral triangle is intended to alert the user to the presence of uninsulated "dangerous voltage" within the product's enclosure that may be of sufficient magnitude to constitute a risk of electric shock to persons.

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.

WARNING: THIS APPARATUS MUST BE EARTHED

IMPORTANT

THE WIRES IN THIS MAINS LEAD ARE COLOURED IN ACCORDANCE WITH THE FOLLOWING CODE:

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 1一 or coloured GREEN and YELLOW.

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.

• This applies only to products distributed by YAMAHA KEMBLE MUSIC (U.K.) LTD.

SPEAKERS

European Specifications Only

This mark indicates a dangerous electrically live terminal. When connecting an external wire to this terminal, it is necessary either to have "a person who have received appropriate guidance on handling" make the connection or to use leads or a cord that have been manufactured in such a way that the connection can be made simply and without problem.

Precautions

WARNING

Installation

• Connect this unit's power cord only to an AC outlet of the type stated in this Owner's Manual or as marked on the unit. Failure to do so is a fire and electrical shock hazard.
• Do not allow water to enter this unit or allow the unit to become wet. Fire or electrical shock may result.
• Do not place a container with liquid or small metal objects on top of this unit. Liquid or metal objects inside this unit are a fire and electrical shock hazard.
• Do not place heavy objects, including this unit, on top of the power cord. A damaged power cord is a fire and electrical shock hazard. In particular, be careful not to place heavy objects on a power cord covered by a carpet.
• Use only the included power cord for this unit. Using other types may be a fire and electrical shock hazard.
• The power to this device is not completely shut off even when the power switch is turned off. Locate the device close to the AC outlet so you can easily reach the power plug.

Operation

• Do not scratch, bend, twist, pull, or heat the power cord. A damaged power cord is a fire and electrical shock hazard.

• Do not remove the unit's cover. You could receive an electrical shock. If you think internal inspection, maintenance, or repair is necessary, contact your dealer.

• Do not modify the unit. Doing so is a fire and electrical shock hazard.
• If lightning begins to occur, turn off the power switch of the unit as soon as possible, and unplug the power cable plug from the electrical outlet.
• If there is a possibility of lightning, do not touch the power cable plug if it is still connected. Doing so may be an electrical shock hazard.

In case an abnormality occurs during operation

• If the power cord is damaged (i.e., cut or a bare wire is exposed), ask your dealer for a replacement. Using the unit with a damaged power cord is a fire and electrical shock hazard.
• Should this unit be dropped or the cabinet be damaged, turn the power switch off, remove the power plug from the AC outlet, and contact your dealer. If you continue using the unit without heeding this instruction, fire or electrical shock may result.
• If you notice any abnormality, such as smoke, odor, or noise, or if a foreign object or liquid gets inside the unit, turn it off immediately. Remove the power cord from the AC outlet. Consult your dealer for repair. Using the unit in this condition is a fire and electrical shock hazard.

CAUTION

Installation

• Hold the power cord plug when disconnecting it from an AC outlet. Never pull the cord. A damaged power cord is a potential fire and electrical shock hazard.
• Do not touch the power plug with wet hands. Doing so is a potential electrical shock hazard.
• This unit has ventilation holes at the rear to prevent the internal temperature rising too high. Do not block them. Restricted ventilation holes are a fire hazard.
• When rack-mounting the unit, allow enough free space around the unit for normal ventilation. This should be 10cm at the sides, 15cm behind, and 25cm above.

For normal ventilation during use, remove the rear of the rack or open a ventilation hole.

If the airflow is not adequate, the unit will heat up inside and may cause a fire.

Operation

• Use only speaker cables when connecting speakers to amplifier outputs. Using other types of cables is a fire hazard.

Maintenance

• Clean the contacts of the phone plug before connecting it to the SPEAKERS jack of this unit. Dirty contacts may generate heat.

PRECAUTIONS FOR OPERATION

Connector pin assignments

• XLR-type connectors are wired as follows: pin 1: ground, pin 2: hot (+), and pin 3: cold (-).

Replacing abrasive parts

• The performance of components with moving contacts, such switches, rotary controls, faders, and connectors, deteriorates over time. The rate of deterioration depends on the operating environment and is unavoidable. Consult your dealer about replacing defective components.

Influence on cell phone usage

• Using a cell phone (mobile telephone) near this unit may induce noise. If noise occurs, use the telephone away from the unit.

Volume level setting

• Do not set all equalizer controls and faders to maximum. Doing so may cause oscillation depending on the condition of the connected unit and speakers, and may damage the speakers.

Introduction

Thank you for purchasing the Yamaha EMX88S/EMX68S Powered Mixer. The EMX88S/EMX68S has the following features. In order to take full advantage of the EMX88S/EMX68S and enjoy long and trouble-free performance, please read this owner's manual carefully, and keep it in a safe place for future reference.

Features

• The EMX88S/EMX68S features eight input channels (EMX88S), six input channels (EMX68S) that support a wide range of audio sources, from microphones to line-level devices. The microphone input for each channel has +15V phantom power for use with condenser-type microphones.
• Two powerful main amps are built-in to deliver 400W + 400W (800W monaural when bridged). According to your needs, the output signal to the power amps can be either stereo [MAIN L-R], [MAIN (L + R)] + monitor [MAIN (L + R) - MON] , or [MAIN (L + R)] (bridge connection).

Stereo

The stereo-mixed main signal will be output from speaker output jacks A and B of the EMX88S/ EMX68S. Either one or two speakers can be connected to each set of speaker jacks.

[MAIN (L + R)] + monitor

The monaural-mixed main signal will be output from speaker jacks A of the EMX88S/EMX68S, and the monitor signal will be output from speaker jacks B. Either one or two speakers can be connected to each set of speaker jacks.

[MAIN (L + R)] (bridge connection)

The two power amps will be bridged, and the mon- aural-mixed main signal will be output from the BRIDGE jack. This allows high-volume output when using only one speaker.

• Individual seven-band graphic equalizers are provided to the main and the monitor sections. In this way, you can individually adjust the volume level and frequency response of the main speakers and monitor speakers.
• Two limiter circuits are built-in to prevent excessive input levels to the amp.
• The 16 built-in effect types are equivalent in quality to those of the acclaimed Yamaha SPX series of multi-effect units, and allow a variety of effects to be applied to add reverb or ambience to vocals or instruments. The 16 types include TAP DELAY, which lets you easily adjust the delay time.
• The EMX88S/EMX68S has implemented "EEEngine", Yamaha's epochal amp drive technology to create an unrivaled high-efficiency drive.

The EEEngine's energy-saver/low-heat-generation design has reduced power consumption to 50% or

less, and reduced heat generation to 35% or less (in field applications, compared to Yamaha's previous models), and has lead to a reduction in energy cost and to less-restrictive installation requirements related to heat generation.

Contents

Introduction 5
Features 5

EMX88S/EMX68S Quick Guide 6

Front and rear panel 10

Control panel 10
Input/output panel. 14
Rear panel 16
Installation 16

Connections 17

Basic Operation 20

Connecting microphones and instruments 20
Sending an independent mix to the monitor speakers 20
Using the digital effect 20

Example setups 22

As a conference PA system/installed sound system 22
As a band PA 23

Installing an optional rack mount kit 25

Troubleshooting 26

Specifications 27

General specifications 27
Input specifications 28
Output specifications 28
Dimensions 29
Block and Level diagram 30

EMX88S/EMX68S Quick Guide

The following steps (1-5) explain the basic connection and operation of the EMX88S/EMX68S. Also, please read "Front and Rear Panel" and "Basic Operation" following this Quick Guide section to learn more about using the EMX88S/ EMX68S.

STEP1 Connection

Connecting speakers

Using speaker cables, connect each speaker to the SPEAKERS A 1 jack and to the B 1 jack in the SPEAKERS jack section on the rear panel of the EMX88S/EMX68S.

• The diagram above shows an example of connecting two main speakers. Refer to pages 17-18 for other connection examples.
• You may connect to either of the two jacks on the speakers.
• Be sure to use a cable designed for speaker connection.

Never connect the speakers in the manner shown below. Otherwise, the EMX88S/EMX68S's built-in power amplifier will be damaged.

Setting the power amplifier mode

Set the power amp select switch (located on the right corner on the panel) to MAIN L-R.

Power amp select switch

• This Quick Guide assumes that two main speakers are connected. Refer to pages 13, 17, 18 for other connections and power amp select switch settings.
• When the power amp select switch is set to the MAIN L-R position, the stereo L signal will be output from the SPEAKERS A jacks, and the stereo R signal will be output from the SPEAKERS B jacks.

Connecting a microphone

Make sure that the power is turned off to the EMX88S/EMX68S.

Connect a microphone to the Low-Z jack or MIC jack.

Using a condenser microphone

Turn on the PHANTOM switch (located in the upper right corner on the panel).

PHANTOM switch

• Do not connect or disconnect a condenser microphone while the power to the unit is on and the PHANTOM switch has been turned on.

Connecting a CD player, MD player, and/or cassette deck

Connect a CD player or MD player to the 2TR IN jacks. Refer to the operation manual of the corresponding device for more information on the input and output of the device.

• To connect a second player, use the LINE jack or Hi-Z jack.
• You cannot use the Hi-Z jack and the Low-Z jack for the same channel at the same time. If a microphone has already been connected to the Low-Z jack of a channel, you cannot connect a player to the Hi-Z jack of the channel.
• Connect a recorder to the REC OUT jacks.

Connecting an electric acoustic guitar or electric bass

Connect an electric acoustic guitar or electric bass to the Super Hi-Z jacks.

• If you wish to use a guitar signal processor or bass effect unit, connect them to the Hi-Z jack or LINE jack. You cannot use the Hi-Z jack and the Low-Z jack for the same channel at the same time. If a microphone has already been connected to the Low-Z jack of a channel, you cannot connect the effect unit to the Hi-Z jack of the channel.

Connecting an electronic musical instrument

To the EMX88S/EMX68S's LINE jacks, you can connect an electronic musical instrument such as a synthesizer, drum machine, signal processor connected to an electric guitar, etc. Refer to the diagram below to make a stereo connection from the output jacks (such as L/MONO and R) of an electronic musical instrument to the LINE jacks in stereo.

If you wish to connect multiple instruments, make a monaural connection as shown below.

• You can also use the Hi-Z jacks and Super Hi-Z jacks to connect multiple instruments. You cannot use the Hi-Z jack and the Low-Z jack for the same channel at the same time. If a microphone has already been connected to the Low-Z jack of a channel, you cannot connect an instrument to the Hi-Z jack of the channel.

STEP 2 Power on

1 Turn on the power to all external devices connected to the EMX88S/EMX68S.
2 Make sure that the MASTER controls in the MONITOR section and the MAIN section are set to "0," then press the POWER switch on the EMX88S/EMX68S to turn on the power.

• Be sure to follow the power up sequence specified above to prevent the speakers from being damaged.
• To correct the low range, turn on the YAMAHA SPEAKER PROCESSING switch in the upper right corner of the panel.

STEP 3 Sound output

Set the MASTER control in the MAIN section to “ ,” then while playing an instrument connected to a channel to be checked (or while speaking to a connected microphone), adjust the LEVEL control of the corresponding channel so that the 0 LED of the peak level indicator in the MAIN section will light up momentarily.

• Do not press the PAD switch if sound is input from the microphone. Otherwise, press the PAD switch on.
• If you are using one of the speakers as a monitor speaker, use the MASTER control of the MONITOR section to adjust its volume.

• Note that if the LIMITER indicator stays lit for a long time, the built-in amplifier and speakers may be damaged.

STEP 4 Applying built-in effects

1 Turn on the ON switch in the DIGITAL EFFECT section. The ON switch indicator lights up.
2 Using the Program selector, select one of 16 effect types.
3 Adjust the amount of effect applied by using the EFFECT control of the target channel and the EFFECT RTN control in the MAIN section.

STEP 5 Power off

1 Press the POWER switch of the EMX88S/EMX68S to turn off the power to the unit.
2 Turn off the power to all connected devices.
- Be sure to follow the power off sequence specified above to prevent the speakers from being damaged.
- Set the MASTER controls in the MAIN section and the MONITOR section to "0" for use next time (so that a loud noise will not sound the next time you turn on the power to the unit).

Front and rear panel

Control panel

Channel section

Use these controls to adjust factors such as the equalization, (frequency response), volume, effect and monitor output level for the input signal to each channel.

(1) Equalizer controls (HIGH, MID, LOW)

This is a 3-band equalizer that adjusts the high frequency range, mid frequency range, and low frequency range of each channel. Response is flat when the knobs are in the “▼” position. Rotating it toward the right will boost the corresponding frequency band, and rotating it toward the left will cut it.

The base frequency (or center frequency), range of boost or cut, and equalizer type of each band are as follows.

HIGH: 10kHz ± 15 dB shelving type

MID: 2.5kHz ± 15 dB peaking type

LOW: 100Hz ± 15 dB shelving type

② MONITOR control

For each channel, this controls the amount of signal that is sent to the MONITOR bus.

The signal of the MONITOR bus is sent to the MONITOR jacks (input/output panel ⑦).

Note: The signal is sent to the MONITOR bus from a location before the level control (⑤) of each channel. This means that it will not be affected by the setting of the Level control.

(3) EFFECT control

For each channel, this controls the amount of signal that is sent to the EFFECT bus.

The signal of the EFFECT bus is sent to the built-in digital effect, and to the EFFECT OUT jacks (input/output panel ④).

Note: The signal is sent to the EFFECT bus from a location after the level control (⑤) of each channel. This means that the amount of signal that is sent to the EFFECT bus will be affected not only by the setting of the effect control, but also by the setting of the level control.

(4) PAN control (BAL/PAN control for CH7/8 (EMX88S), CH5/6 (EMX68S))

This knob adjusts the stereo image (L/R) for each channel. Adjust for equal volume on left and right with a sound source input to the CH7 and 8 (EMX88S), CH5 and 6 (EMX68S) LINE connectors (L/R).

(5) LEVEL control

This adjusts the output level for each channel.

⑥ PAD switch (1-6 (EMX88S) only, 1-4 (EMX68S) only)

This switch attenuates the input signal by 30 dB. When connecting a line level device to channels 1-6 (EMX88S), 1-4 (EMX68S), or if the mic input is distorted, turn this switch on (the pressed-in position).

DIGITAL EFFECT section

This section allows you to turn the built-in digital effect on/off and to select the effect type.

⑦ PROGRAM selector

This knob selects the effect type for the internal digital effect.

(8) PARAMETER control

This knob adjusts the parameter of the internal digital effect.

• If 16 TAP DELAY is selected by the PROGRAM selector, this adjusts the amount of feedback.

⑨ DIGITAL EFFECT ON switch

Use this switch to turn the digital effect on and off. When this switch is on, the effect bus signal processed with the built-in digital effect is sent to the stereo (MAIN L, R) bus and MONITOR bus. The mix level of the effect sound is adjusted with the EFFECT RTN control in the MAIN and MONITOR sections.

The LED beside the switch will light when the effect is on.

TAP switch

Only if the PROGRAM selector has selected TAP DELAY as the internal effect type, you can press this switch to set the desired delay time.

Press the TAP switch several times, and the inter

val between the last two presses will be set as the delay time. The specified time will be remembered even if the power is turned off.

The LED beside the switch will blink in synchronization with the delay time only when the effect type is TAP DELAY.

MAIN section

This section allows you to adjust the tone and volume of the stereo (MAIN L, R) bus, the mix level of the built-in effect, and the mix level of the external input.

⑪ Graphic equalizer

The EMX88S/EMX68S has a 7-band graphic equalizer for adjusting the frequency response of the stereo (MAIN L, R) bus signal. This allows you to cut or boost each frequency band by a maximum of ± 12dB .

These graphic equalizer settings affect both the stereo (MAIN L, R) bus signal output to the speakers and the line level signal output from the MAIN (STEREO) jack (input/output panel ⑦).

⑫ EFFECT RTN control

Use this control to adjust the effect signal sent to the stereo (MAIN L, R) bus from the built-in digital effect.

⑬ AUX IN control

This control adjusts the amount of signal that is sent from the AUX IN jack to the stereo (MAIN L, R) bus.

14 2TR IN control

This adjusts the amount of signal that is sent from the 2TR IN jacks to the stereo (MAIN L, R) bus.

15 MASTER control

This control adjusts the stereo (MAIN L, R) bus signal output level.

This setting is output to the SPEAKERS A, B, BRIDGE jacks and the MAIN (STEREO) jack (input/output panel ⑦) on the rear panel and appears in the stereo (MAIN L, R) bus signal.

Peak level indicator

This indicator allows you to monitor the level of the signal which is output from the MAIN (STEREO) jack (input/output panel ⑦).

Note: To avoid distortion, adjust the MASTER control (⑤) so that the 0 indicator lights occasionally.

■ MONITOR section

This section allows you to adjust the tone and volume of the MONITOR bus, and specify the mix level of the built-in digital effect.

⑦ Graphic equalizer

The EMX88S/EMX68S has a 7-band graphic equalizer for adjusting the frequency response of the MONITOR bus signal. This allows you to cut or boost each frequency band by a maximum of ± 12dB . You can use these sliders to reduce the level of frequency bands at which feedback easily occurs. Frequency response is flat when a slider is in the center position. Moving a slider in the positive direction will boost, and in the negative direction will cut.

These graphic equalizer settings affect both the MONITOR bus signal output to the speakers and the line level signal sent from MONITOR jack signal (input/output panel ⑦).

⑱ EFFECT RTN control

This control adjusts the effect signal level sent to the MONITOR bus from the built-in digital effect.

19 2TR IN control

This control adjusts the amount of signal that is sent from the 2TR IN jacks to the MONITOR bus.

20 MASTER control

This control adjusts the MONITOR bus signal output level.

This setting is output to both the front and rear panel MONITOR jacks and appears in the MONITOR bus signal.

② Peak level indicator

This indicator allows you to monitor the level of the signal which is output from the MONITOR jack (input/output panel ⑦).

Note: To avoid distortion, adjust the MASTER control (②) so that the 0 indicator lights occasionally.

PHANTOM switch, indicator

2 PHANTOM ON, OFF switch

This switch turns the phantom power supply on/ off for the Low-Z XLR type input jacks of channels 1-6 (EMX88S), 1-4 (EMX68S).

Turn this switch off if you do not use it.

■ POWER AMP section

Here you can select the operating mode of the power amp. You can also check the operation of the limiter circuit.

23 LIMITER indicator

This indicator lights up when the level of the signal output from the power amp section reaches the maximum and the limiter is activated. Adjust appropriate control so that the indicator lights up for only a short while when the signal reaches the maximum level.

Note: The indicator lights up or flashes for a longer duration if the power amp section is significantly overloaded, which could result in malfunction. Avoid such a situation.

24 Power amp select switch

Select one of the following settings to specify the signals to be routed to the corresponding jacks according to the speaker connection at the SPEAKERS jacks ① on the rear panel.

- MAIN L-R

The stereo (MAIN L, R) bus signals are output from the SPEAKERS A 1, 2 jacks and the SPEAKERS B 1, 2 jacks. The final level of these signals is adjusted by the MAIN MASTER control.

- MAIN (L+R)-MON

The MONITOR bus signals are output from the SPEAKERS B 1, 2 jacks, and a monaural signal that is a mix of the stereo (MAIN L, R) bus signals is output from the SPEAKERS A 1, 2 jacks. The final level of these signals is adjusted by the MAIN MASTER control and the MONITOR MASTER control.

- MONO (BRIDGE)

The monaural signal that is a mix of the stereo (MAIN L, R) bus is output from the BRIDGE jack. The final level of this signal is adjusted by the MAIN MASTER control. Set the switch to this position when you connect only a single speaker for high-volume amplification.

This switch enables you to compensate the low range of the speakers. The low range balance when this switch is on varies depending on the speakers.

First, check the low range balance by auditioning the resultant sound, then set this switch to on or off.

STAND-BY

26 ON/OFF switch

This switch mutes (silences) the input signals from channels 1-8 (EMX88S) or channels 1-6 (EMX68S). The indicator will blink when this switch is on.

The on/off setting of this switch does not affect the signal from the AUX IN jacks or 2TR IN jacks.

Power switch and indicator

7 Power ON/OFF switch and indicator This switch turns the power of the EMX88S/ EMX68S on/off. When the switch is turned on, the indicator lights up.

Note: Before turning the EMX88S/EMX68S on/off, turn down the MASTER controls of the MONITOR and MAIN section.

Input/output panel

① Channel input jacks (Hi-Z, Low-Z) 1-6 (EMX88S), 1-4 (EMX68S)

These are the input jacks for channels 1-6 (EMX88S), 1-4 (EMX68S).

By using the PAD switches (control panel ⑥) you can connect any of the jacks to a wide range of sources from mics to line level devices (synthesizers or rhythm boxes etc.). The Low-Z jacks can provide +15V phantom power, allowing you to use condenser microphones.

Both Hi-Z and Low-Z are balanced, and are compatible with microphones of output impedance 50 - 600 or line level devices of 600 . The nominal input level is from -40dB to -10dB for the Hi-Z jacks, and from -50dB to -20dB for the Low-Z jacks.

Pin connections for the Hi-Z and Low-Z jacks are as follows.

Low-Z jacks (XLR type)	Hi-Z jacks (TRS phone jacks)
Pin 1: ground	Sleeve: ground
Pin 2: hot (+)	Tip: hot (+)
Pin 3: cold (-)	Ring: cold (-)

Note: It is not possible to simultaneously use both the Hi-Z and Low-Z inputs of a given channel. For each channel, use only one of the inputs as appropriate for the input source. Phantom power is switched on/off in simultaneously for channels 1-8 (EMX88S), 1-6 (EMX68S). For this reason, devices which do not require phantom power must be connected to the Hi-Z or LINE jacks if the PHANTOM switch (control panel ② ) is on.

② Super Hi-Z jacks

These two phone jacks are the input connectors for input channel 5-6 (EMX88S), 3-4 (EMX68S). They are unbalanced, can be used simultaneously, and their high input impedance makes them ideal for use with instruments such as electric-acoustic guitar and electric bass. They can also be used with line-level sources, such as synthesizers and drum machines.

③ Channel input jacks (MIC/LINE) 7-8 (EMX88S), 5-5 (EMX68S)

These are the input jacks for channels 7-8 (EMX88S), 5-6 (EMX68S).

Connect microphones to the MIC jacks. Connect line-level devices, such as synthesizers to LINE L (MONO)/R jacks if the devices are stereo sound sources. Use the LINE L (MONO) jack if the devices are monaural sound sources. The MIC jacks can provide +15V phantom power, allowing you to use condenser microphones.

The MIC jacks are balanced, and are compatible with microphones of output impedance 50-600Ω.

The LINE jacks are unbalanced, and are compatible with line level devices of 600 output impedance. Nominal input level is -50dB for the MIC jacks and -10dB for the LINE jacks.

Note: The MIC and LINE inputs for channel 7 (EMX88S), 5 (EMX68S) can be used simultaneously but their levels cannot be adjusted separately (Same for channel 8 (EMX88S), 6 (EMX68S).)

④ EFFECT OUT jack

The input of an external effect such as a delay or echo can be connected to this jack.

The signal adjusted by the EFFECT control of each channel will be sent to the EFFECT bus, its level adjusted by the EFFECT OUT control, and output from this jack.

The nominal output level and impedance are +4dB / 10k

⑤ FOOT SW jack

You can connect a Yamaha FC5 foot switch (sold separately) to this jack and use it to turn the built-in digital effect on and off. The Digital Effect ON switch on the front panel must always be set to ON in order to use the foot switch.

⑥ AUX IN/2TR IN-INPUT TO MAIN jacks

These are input jacks that allow the signal from an external device to be added to the MAIN output.

• AUX IN jacks: Connect these jacks to the output jacks of an external effects processor. If the effects processor has a stereo output, connect it to the AUX IN L (MONO) and R jacks. If it has monaural output, use the AUX IN L (MONO) jack. Signal input to these jacks is sent to the stereo (MAIN L, R) bus.
• 2TR IN jacks: Use these jacks to connect a stereo device, such as a cassette player or a CD player. The signals input to these jacks is sent to the stereo (MAIN L, R) bus.

The nominal input level and impedance are -10dB/600 for the AUX IN jack, and -10dBV / 600 for the 2TR IN jacks.

⑦ REC OUT/MAIN (STEREO)/MONITOR-OUTPUT jacks

These are output jacks which send line level signals from the EMX88S/EMX68S to external devices. A stereo recording device such as a cassette recorder or MD recorder can be connected to the REC OUT jacks, and a playback device such a power amp can be connected to the MONITOR and MAIN (STEREO) jacks. The signals sent from each jack are as follows.

• REC OUT jacks: The stereo (MAIN L, R) bus signal before it has passed through the MASTER control and graphic equalizer
• MONITOR jack: The MONITOR bus signal which has passed through the MONITOR MASTER control and graphic equalizer
• MAIN (STEREO) jack: The stereo (MAIN L, R) bus signal which has passed through the MAIN MASTER control and graphic equalizer

The nominal output level and impedance are -10dBV / 10k for the REC OUT jacks, and +4dB / 10k for the MONITOR/MAIN (STEREO) jacks.