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Channel 1 Tone Controls
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The Treble, Bass, and Middle tone controls are used to help you shape your sound. They are post-
gain and pre-volume. These are active only when Channel 1 is selected.
Vintage / Modern Switch
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The voice of Channel 1 can be modified from a smooth "vintage" voice to a more
aggressive "modern" voice.
Channel 2
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Channel 2 is the clean channel and thus has no Gain control. In other respects the layout
is the same as that of Channel 1, with independent Volume and Treble, Bass, and Middle
tone controls. When channel 2 is active the green LED located next to the Channel 2 Volume
control is illuminated.
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
Master Volume Control
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The Master Volume control adjusts the overall volume of the amplifier.
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 YCV4050 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 Rtn jacks of the YCV4050 allow convenient use of an external effect unit. Simply
connect a 1/4 inch phone cable to the Send jack of the YCV4050 and then connect this cable
to the Input of your effects unit. To send the processed signal back to the YCV4050, connect the
output of the effects unit to the Rtn jack of the YCV4050.
The 1/4 inch TRS Send jack can be used as part of an effects loop in conjunction with the
Rtn jack. It 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 YCV4050 with another guitar amplifier by plugging into the Rtn jack of the slave
amplifier.
The 1/4 inch TRS Rtn jack can be used as your return jack for your effects loop. It accepts
an input signal that is passed to the power amplifier, so it can be used as a power amp in. The
Master Control section regulates the signal so you can still 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 YCV4050 is
compatible with most aftermarket latching dual-footswitch pedals.
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