Kustom Footswitch Guide for Stereo Amplifier Models 72 Coupe & 36 Coupe

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‘ 7 2 C o u p e H a r d t o p C o n t r o l P a n e l s

’72 Coupe Hardtop Back

1)Effects Send—This 1⁄4” jack delivers a tube-driven preamp signal to ex- ternal 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 stereo, 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 amp Returns.

2)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 ef- fects loop is known as a “series” loop, since it breaks the path of the ampliﬁer and “inserts” the effect in series.

3)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.

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)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 loud-

speaker. This output is very useful for direct recording, and especially help- ful for live applications since it eliminates a live microphone on stage and the resulting feedback potential. The Coupe ampliﬁer should never be oper- ated without a speaker plugged into a speaker jack.

6)Ground Lift—The Ground Lift switch disconnects pin 1 of the XLR Di- rect 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 different circuits, and should only be used if there is an audible hum. Pressing the ground lift does not disconnect the ground connection from the Coupe’s chassis.

7)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 3 switches through a simple stereo cable. In an emergency, 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.

8)Footswitch Assignment—This button selects which of the amp’s ef- fects are controlled by the “Effects” button on the footswitch. If the switch is IN, the footswitch will control the Reverb and the Tremolo will only be controlled by the Pull Active Switch on the Speed control. If the Footswitch Assignment button is OUT, then the Reverb will be active always, and the footswitch will remotely control the Tremolo/Vibrato, overriding the setting of the Pull Active Switch on the Speed control.

36 coupe, 72 Coupe specifications

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