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’36 Coupe Back
1) Footswitch—The Footswitch jack on the Coupe is a stereo jack that
connects the Coupe footswitch to the amplifier. It uses a special circuit
to decode the three switches through a simple stereo cable. In an emer-
gency, a mono instrument cable can be used to allow footswitching of the
channels only. In this setup, the LEDs will not be visible, but at least the
footswitch will select Rhythm or Lead channels.
2) Ground Lift—The Ground Lift switch disconnects pin 1 of the XLR
Direct Out jack to eliminate a “ground loop” hum. A ground loop can
exist when the Coupe and the mixer it is plugged into are connected to
grounded outlets that are in physically different locations and/or on dif-
ferent circuits, and should only be used if there is an audible hum. Press-
ing the ground lift does not disconnect the ground connection from the
Coupe’s chassis.
3) Direct Out—The XLR Direct Out jack is designed to connect the Coupe
amplifier to a recording or live mixer. The output is speaker-emulated,
and mimics the sound of the KEI-Kustom Eminence Integrated Turbo-12
loudspeaker. This output is very useful for direct recording, and espe-
cially helpful for live applications since it eliminates a live microphone
on stage and the resulting feedback potential.
The Coupe amplifier should
never be operated without a speaker plugged into a speaker jack.
4) Direct Volume—Sets the level of the speaker-emulated direct out.
This control should be set as high as possible for the best signal-to-noise
ratio.
5) Boost Volume—The Boost Volume knob controls the amount of foot-
switchable boost, and is particularly useful for solos. It will provide up to
10dB of “Master Volume” boost, and boosts both channels. The tone is
optimized to increase the volume without sacrificing too much headroom
in the power amp, so the resulting solo cuts through. The boost is active
if the footswitch is unplugged.
6) Effects Return—This 1⁄4” jack breaks the flow of amplifier signal to
allow an external effects device to “return” to the amp. The Return jack
can also be used for a power amp input, when using an external preamp.
This all-tube effects loop is known as a “series” loop, since it breaks the
path of the amplifier and “inserts” the effect in series.
7) Effects Send—This 1⁄4” jack delivers a tube-driven preamp signal
to external effects devices. It can be used to send the signal to another
amplifier to run multiple amps. Connecting a 1⁄4” plug does NOT break
the flow of the amplifier signal. To connect two Coupe amplifiers in ste-
reo, a stereo effects device can be driven from one Coupe amp’s Send,
and the device’s two stereo outputs can be returned to both Coupe amps’
Returns.
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‘ 3 6 C o u p e C o n t r o l P a n e l s