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Front Panel
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Front Panel Features
1. Power Switch
This is the On/Off switch for the mains power to the
amplifier. Whenever it is switched 'On', the switch will
light. Please ensure the amplifier is switched off and
unplugged from the mains electricity supply before being
moved.
2. Standby Switch
The Standby Switch is used in conjunction with the
Power Switch (item 1) to 'warm up' the amplifier
before use and to prolong the life of the output valves.
When powering up the amplifier always engage the
Power Switch (item 1) first. This allows the
application of the voltage required to heat the valves
to their correct operating temperature. After about 2
minutes, when the valves are up to the correct
temperature, the Standby Switch can be engaged.
Upon doing this the H.T. (High Tension) which is the
high voltage required by the output valves to pass
signal (and hence produce sound) is applied.
To prolong valve life, the Standby Switch alone
should be used to turn the amplifier on and off during
breaks in a performance. Also, upon full power down,
always disengage the Standby Switch prior to the
main Power Switch (item 1).
3. Presence Control
This control operates in the power amp section of your
amp and adds high frequencies to your tone, creating
crispness and bite. As you turn this control up
(clockwise), your sound will become more cutting.
4. Bass Control
This controls the amount of low frequencies (bottom
end) in your tone.
5. Middle Control
This controls the all-important mid-range of your
sound. Turning this up (clockwise) will make your guitar
sound fatter and fuller. Conversely, turning it down
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Rear Panel
(anticlockwise) will reduce the mids in your sound, giving
you that aggressive 'scooped' tone that is a staple of
thrash and nu-metal guitar playing.
6. Treble Control
This control determines the amount of treble and makes
your guitar's tone brighter as it is turned up.
IMPORTANT NOTE: The 2203's tone network is highly
interactive and, because of this, altering the setting of one
control can change the way the other controls behave.
So, don't be afraid to experiment!
7. Master Volume
Controls the output volume of the amplifier. This allows
the user to turn up the Pre-Amp Volume control (8) for
maximum gain whilst keeping the amp's overall loudness
at a desired level.
8. Pre-Amp Volume
This controls how hard you drive the pre-amp valves.
Turning this control up overdrives the pre-amp and
creates a desirable, harmonically rich distortion.
9. High Sensitivity Input
This is the High Sensitivity input of the amp – in theory,
such an input is supposed to be used for low-output
pickups. This said, 99.9% of all 2203 users ignore this
and plug guitars loaded with high-output pickups into this
input, because it enables them to drive the pre-amp even
harder.
10. Low Sensitivity Input
This is the Low Sensitivity input of the amp, which was
designed for hot (high-output) pickups; we would
suggest you try both inputs and then decide which one is
best for you.
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