VHT Special 12/20 RT Head - Manual (Page 4)

CONTROL PANEL FEATURES CONTINUED
5. Depth Control: This 6-position rotary switch selects the output tubes’ low-frequency roll-off point. Set fully clockwise for
the deepest low-frequency extension. Lower settings (counterclockwise) expose more midrange texture and detail; the low-
est settings emphasize more presence and bite.
6. Texture Switch: This 3-position rocker switch selects the output’s high-frequency roll-off point and also influences the
midrange texture. The middle position provides maximum top-end extension and the most harmonically complex texture;
the left position provides subtle high-frequency roll-off for a slightly smoother texture; the right position rolls-off more high
frequencies for the smoothest texture.
7. Tremolo: This control adjusts the intensity and depth of the tremolo effect. The Tremolo can be switched on or off with
the 2-button Reverb/Tremolo footswitch.
8. Slow/Fast Switch: This switch selects the tremolo circuit’s range.
9. Speed: This control selects the tremolo speed.
10. Reverb: This control adjusts the intensity of the Reverb effect. The Reverb can be switched on or off with the 2-button
Reverb/Tremolo footswitch.
11. Pull Deep: Pull this knob to add more low-end depth to the reverb signal.
12. Tone Control: This control adjusts the balance of the high and low frequencies.
13. Volume Control: Turning this knob clockwise increases the preamp drive and overall sound level.
14. Pull Boost: Pull this knob to partially bypass the internal tone shaping/voicing circuitry, which boosts the preamp gain
and increases the midrange emphasis. This feature can also be accessed by the footswitch.
15. Input: Pedal-friendly 1-megohm input impedance.
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SLOW/FAST
DEEP
12 13
6 8
1 2 3 4 5 7 9 14 15 10 11
1. Power Switch: This switch turns the amplifier on or off.
2. Pentode/Standby/Triode: The Triode setting reduces the amplifier’s maximum output power to approximately one-half
of the Pentode setting. Triode setting produces a richer and smoother tone, with earlier breakup than the Pentode setting.
The middle position is Standby mode.
3. Watts Control: The Watts control adjusts the output tube’s operating voltage and maximum output power. Maximum
output power ranges from less-than 1 watt (fully counterclockwise) to 12 or 20 watts (fully clockwise).
4. Jewel Light: This light will be illuminated when the Power Switch is in the On position; the jewel light will be off when
the Power switch is in the Off position.
CONTROL PANEL FEATURES
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