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Channel 2
Channel 2 has been optimized as 'the clean' channel. When channel 2 is active, the green
LED located next to the Channel 2 Volume control is illuminated.
Gain & Volume Controls (C
Channel 2 uses a Gain control in conjunction with a Volume control to control the amount of
tube-based overdrive and volume. The Gain control is used to adjust the amount of overdrive,
while the Volume control allows you to set the actual loudness of the amplifier.
Brightness Switch
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Channel 2 includes a Brightness switch that activates a circuit to provide additional treble
boost to help make your tone sparkle.
Master Controls
Tone Controls
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The Treble, Bass, and Middle tone controls are to help you shape your sound. They are
post-gain and pre-volume.
Reverb Control
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The Master Control section also includes a rotary Reverb control that adjusts the overall
reverb level for both channels. The YCV20 is equipped with a long-style Accutronics® dual-
spring reverb for authentic vintage reverb.
Standby Switch & Indicator
This switch controls the high voltage power being supplied to the tubes. This mode effectively
keeps the tubes warmed up when the amp is not in use. The large, jewel indicator on the front
panel glows Red when the amp is fully powered-up and changes to Yellow when the high voltage
circuit has been turned off. Putting the amp into Standby mode (i.e. during set breaks) shuts off the
amplifier output stage and effectively increases tube life by reducing wear on the tubes.
EFX / LINE Send & Return Jacks
The Send and Return jacks of the YCV20 allow convenient use of an external effect units. Simply
connect a 1/4 inch phone cable to the Send jack of the YCV20 and then connect this cable to the
Input of your effects unit. To send the processed signal back to the YCV20, connect the output of the
effects unit to the Return jack of the YCV20.
The Send Jack can also be used as a direct line out (preamp-out). The -10dBu output is ideal for
most guitar effects pedals and professional signal processors. You can also use this output to slave
the YCV20 with another guitar amplifier by plugging into the Return jack of the slave amplifier.
The 1/4 inch TRS Return jack is usually used as the Return for your effects loop. It allows an
input signal to pass directly to the power amplifier. The Master Control section regulates the
signal, so you can add Reverb.
Footswitch Jack
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Connecting a footswitch to the 1/4 inch TRS Footswitch jack deactivates the control
panel mounted Channel Select and Boost switches. These functions are then activated
exclusively by the pedal. The included footswitch features dual-latching switches, each
with a separate LED indicator.
The switching is accomplished with internal relays so there is no audiable noise flowing
through the footswitch cable. Footswitch-induced noise is never an issue. The YCV20 is
compatible with most aftermarket latching dual-footswitch pedals.
External Speaker Jack
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The chassis mounted ¼ inch jacks allow convenient connection of a 8 ohm external speaker
cabinet. If you disconnect the internal 12-inch Celestion® speakers, you can connect up to
two 8 ohm external cabinets.
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