VHT Special 12/20 RT Head - Manual (Page 3)

VHT SPECIAL 12/20RT
THE PEDAL-FRIENDLY AMP WITH SELECTABLE POWER RANGES
PLUS ALL-TUBE SPRING REVERB AND TREMOLO
The VHT Special 12/20RT adds tube-driven spring reverb and tube tremolo to the pedal-friendly Special 12/20 platform. Like
the Special 12/20, the 12/20RT features a unique preamp specifically designed to excel with pedals and multi-effects units,
with a pedal-friendly all-tube buffered effects loop with send and return level controls. And like the 12/20, the 12/20RT also
accepts a wide range of output tube types, with two power ranges complemented by an adjustable Watts control and a Pen-
tode/Triode switch. The Special 12/20RT also features VHT’s unique Depth and Texture controls, a convenient built-in 9-volt
DC pedal power supply, and an international mains voltage selector switch.
Like the Special 12/20, the Special 12/20RT’s preamp was designed to bring the most out of every effects pedal and multi-
effects unit with enhanced clarity, detail, and controlled tube compression. Its low-impedance buffered effects-loop send can
effortlessly drive the most difficult pedals without tone or signal loss. Thanks to its variable send and return level controls,
the 12/20RT’s effects loop can accommodate a wide range of pedal, multi-effects units and rack effects. The 12/20RT’s Re-
verb, Tremolo, Depth and Texture controls are post effects loop, so multi-effects users can plug directly into the effect return
and still benefit from the post-effects tube reverb and tremolo, while also fine-tuning the output stage characteristics with
the Depth and Texture controls.
To optimize the amp for a wide variety of output tubes, the VHT Special 12/20RT offers two output-power ranges; safely
located behind the rear panel, a special voltage range switch provides the proper voltages for 6V6 or EL84 output tubes (in
12-watt low-voltage/low-power mode). The high voltage 20-watt setting provides the ideal voltages for higher-power 6L6
or EL34 output tubes. The Special 12/20RT ships with a pair of 6V6 output tubes (VHT 6V6-to-EL84 socket adapters are
required for operation with EL84 tubes). In addition, the Special 12/20RT’s variable Watts control can reduce the maximum
output power to less than one watt for whisper-quiet volume levels.
VHT — THE WORLD LEADER IN AFFORDABLE HANDWIRED AMPLIFICATION
VHT SPECIAL 12/20RT FEATURES
Special Pedal-Friendly Preamp Design
Tube-Driven Effects Loop with Line Out Jack
Effects Send and Return Level Controls
9-Volt DC Pedal Power Supply
6V6 Tube-Driven Spring Reverb with Deep Switch
Tube Tremolo with Slow/Fast Range Switch
Switchable 12/20 Max Output
Variable Watts Control
Pentode/Triode Switch
6-Position Depth Control
3-Position Texture Switch
Footswitchable Push/Pull Boost
Switchable 4, 8 or 16 Ohm Speaker Outputs
International Voltage Switch
Four 12AX7 Tubes
One 6V6 Reverb Driver Tube
Two 6V6 Output Tubes
Accepts EL84 Output Tubes*
Also accepts 6L6 or EL34 Output Tubes
Mod-Friendly Handwired Eyelet-Board Construction
2-Button Reverb/Tremolo Footswitch (Included)
1-Button Boost Footswitch (Included)
12” VHT ChromeBack Speaker, 60-watt, 16 ohm (Combo Only)
*With VHT 6V6-to-EL84 Socket Adapters
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