Rarely used in my personal studio, never gigged, everything works, in original box. Few scratches on top plastic enclosure. Text Dave at 440 22five 706six
$150
Here's the manual https://usa.yamaha.com/files/download/other_assets/0/318950/EMX66ME.PDF
Features
• The EMX66M provides six input channels compatible with mic/line signals, including highimpedance input suitable for an electric-acoustic
guitar. The EMX66M has ample power, with a
maximum output of 300 W+300 W (600 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.
• The power amp section has a limiter circuit to
prevent sound distortion and protect the speakers.
• A digital effect with eight selectable effect types is
built-in. A variety of effects can be applied to add
reverberation or ambiance to vocals or instrumental sounds.
• The EMX66M 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.