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EMX660
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IMPOR TANT NOTICE
This manual has been provided for the use of authorized Yamaha Retailers and their service personnel. It has been assumed
that basic service procedures inherent to the industry, and more specifically Yamaha Products, are already known and under-
stood by the users, and have therefore not been restated.
WARNING : Failure to follow appropriate service and safety procedures when servicing this product may result in per-
sonal injury, destruction of expensive components and failure of the product to perform as specified. For
these reasons, we advise all Yamaha product owners that all service required should be performed by an
authorized Yamaha Retailer or the appointed service representative.
IMPORTANT : This presentation or sale of this manual to any individual or firm does not constitute authorization certifi-
cation, recognition of any applicable technical capabilities, or establish a principal-agent relationship of
any form.
The data provided is belived to be accurate and applicable to the unit(s) indicated on the cover. The research engineering, and
service departments of Yamaha are continually striving to improve Yamaha products. Modifications are, therefore, inevitable
and changes in specification are subject to change without notice or obligation to retrofit. Should any discrepancy appear to
exist, please contact the distributorÕs Service Division.
WARNING : Static discharges can destroy expensive components. Discharge any static electricity your body may have
accumulated by grounding yourself to the ground bus in the unit (heavy gauge black wires connect to
this bus.)
IMPORTANT : Turn the unit OFF during disassembly and parts replacement. Recheck all work before you apply power
to the unit.
WARNING: CHEMICAL CONTENT NOTICE!
The solder used in the production of this product contains LEAD. In addition, other electrical/electronic and/or plastic (Where
applicable) components may also contain traces of chemicals found by the California Health and Welfare Agency (and possibly
other entities) to cause cancer and/or birth defects or other reproductive harm.
DO NOT PLACE SOLDER, ELECTRICAL/ELECTRONIC OR PLASTIC COMPONENTS IN YOUR MOUTH FOR ANY REASON WHAT
SO EVER!
Avoid prolonged, unprotected contact between solder and your skin! When soldering, do not inhale solder fumes or expose
eyes to solder/flux vapor!
If you come in contact with solder or components located inside the enclosure of this product, wash your hands before handling
food.
WARNING
Components having special characteristics are marked and must be replaced with parts having specification equal to those
originally installed.
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SPECIFICATIONS
General specifications
- 0 dB=0.775 Vrms Maximum output power300 W + 300 W/4ohms @0.5% THD at 1 kHz (POWER AMP OUT 1, 2)
215 W + 215 W/8ohms @0.5% THD at 1 kHz (POWER AMP OUT 1, 2)
600 W/8ohms @0.5% THD at 1 kHz (BRIDGE)
Frequency response20 Hz~20 kHz +1 dB, -3 dB @1 W output into 8ohms (POWER AMP OUT)
20 Hz~20 kHz +1 dB, -3 dB @+4 dB output into 10 kohms (MAIN OUT, MONITOR OUT, EFFECT SEND)
Total harmonic distortionLess than 0.5% @20 Hz~20 kHz, 150 W output into 4ohms (POWER AMP OUT 1, 2) Less than 0.3% @20 Hz~20 kHz, +14 dB output into 10 kohms (MAIN OUT, MONITOR OUT, EFFECT OUT)
Hum & noise
(Average, Rs=150W)
(with 20 Hz~20 kHz BPF)-124 dB equivalent input noise, -65 dB residual output noise (POWER AMP OUT)
-88 dB residual output noise (MAIN OUT, MONITOR OUT, EFFECT SEND)
-79 dB (83 dB S/N)
MAIN OUT, MONITOR OUTMaster level control at nominal level and all channel
level controls at minimum.
-69 dB (73 dB S/N)
MAIN OUT, MONITOR OUTMaster level control at nominal level and 1 channel
level control at nominal level.
-75 dB (79 dB S/N)
EFFECT SENDMaster level control at nominal level and all channel
level controls at minimum.
-69 dB (73 dB S/N)
EFFECT SENDMaster level control at nominal level and 1 channel
level control at nominal level.
Maximum voltage gain
(PAD: OFF)88 dB CH IN (Lo-Z) to POWER AMP OUT (CH1~4)
66 dB CH IN (Lo-Z) to MAIN OUT, MONITOR OUT (CH1~4)
72 dB CH IN (Lo-Z) to EFFECT OUT (CH1~4)
48 dB CH IN (Lo-Z) to REC OUT (CH1~4)
56 dB CH IN (Hi-Z) to MAIN OUT, MONITOR OUT (CH1~4)
26 dB AUX IN to MAIN OUT
24 dB TAPE IN to MAIN OUT
66 dB MIC IN to MAIN OUT, MONITOR OUT (CH5-6)
26 dB LINE IN to MAIN OUT, MONITOR OUT (CH5)
46 dB INST IN to MAIN OUT, MONITOR OUT (CH6)
Crosstalk at 1 kHz65 dB adjacent input, 65 dB input to output
Input channel equalization±15 dB Maximum
HIGH 12 kHz shelving*
MID 2.5 kHz peaking
LOW 80 Hz shelving*
* Turn over/roll-off frequency of shelving: 3 dB below maximum variable level.
Meters5 POINTS LED METER (-10, -5, 0, +3, +6 dB) (MAIN OUT, MONITOR OUT)
Graphic equalizer7 bands (125, 250, 500, 1 k, 2 k, 4 k, 8 kHz), ±12 dB Maximum (MAIN OUT, MONITOR OUT)
Internal digital effect8 types (VO.ECHO 1, VO.ECHO 2, VO.REV. 1, VO.REV. 2, HALL 1, HALL 2, ROOM, PLATE)
Phantom power+15 V is supplied to electrically balanced inputs for powering condenser microphones via 2.4 kohms
current limiting/isolation resisters.
LimiterComp. : THD³0.5% (POWER AMP OUT)
LIMIT indicatorsTurns on. : THD³0.5% (POWER AMP OUT)
Protection Circuit (Power Amp.)POWER Switch on/off Mute, DC Detection, Temp (Heatsink Temp³90˚C)
Foot switch (FC-5)DIGITAL EFFECT MUTE : on/off
Power requirementUSA and Canada 120 V AC 60 Hz
Europe 230 V AC 50 Hz
Other 240 V AC 50 Hz
Power consumption250 W
Dimensions (WxHxD)497´275´275 mm
Weight17 kg
