VHT Special 6 Ultra Head User Manual
VHT SPECIAL 6
6-Watt Vacuum Tube High-Gain Guitar Amplier
ULTRA
User Manual
TABLE OF CONTENTS
PRODUCT SAFETY INFORMATION.................1
OVERVIEW.............................................................2
FEATURES.............................................................3
CONTROL PANEL FUNCTIONS.....................4-5
REAR PANEL FUNCTIONS.............................6-7
BLOCK DIAGRAM................................................8
TONE CONTROL GRAPHS..........................9-12
DEPTH CONTROL GRAPH..............................13
TEXTURE CONTROL GRAPH.........................14
SCHEMATIC........................................................15
TECHNICAL SPECIFICATIONS......................16
IMPORTANT SAFETY INSTRUCTIONS
1) Read these instructions.
2) Keep these instructions.
3) Heed all warnings.
4) Follow all instructions.
5) Do not use this amplifier near water.
6) Clean only with dry cloth.
7) Do not block any ventilation openings. Install in accordance with the manufacturer’s instructions.
8) Do not install near any heat sources such as radiators, heat registers, stoves, or other apparatus (including amplifiers) that produce heat.
9) Do not defeat the safety purpose of the polarized or grounding-type plug. A polarized plug has two blades with one wider than the other. A
grounding type plug has two blades and a third grounding prong. The wide blade or the third prong are provided for your safety. If the provided
plug does not fit into your outlet, consult an electrician for replacement of the obsolete outlet.
10) Protect the power cord from being walked on or pinched particularly at plugs, convenience receptacles, and the point where they exit from
the apparatus.
11) Only use attachments/accessories specified by the manufacturer.
12) Unplug this amplifier during lightning storms or when unused for long periods of time.
13) Refer all servicing to qualified service personnel. Servicing is required when the amplifier has been damaged in any way, such as power-
supply cord or plug is damaged, liquid has been spilled or objects have fallen into the amplifier, the amplifier has been exposed to rain or
moisture, does not operate normally, or has been dropped.
14) The amplifier shall not be exposed to dripping or splashing and no objects filled with liquids, such as vases, shall be placed on the amplifier.
15) This amplifier shall be connected to a mains socket outlet with a protective earthing connection.
16) The power/mains plug or amplifier coupler is the disconnect device which must remain readily operable.
WARNING To reduce the risk of fire or electric shock, do not expose this amplifier to rain or moisture.
VHT SPECIAL 6
ULTRA
MORE GAIN! MORE FEATURES! MORE FUN!
With its additional preamp gain stage, amazing power-attenuating Watts control, tube-driven effects loop, Line Out jack, 11-position Depth
control and 3-position Texture switch, the new high-gain Special 6 Ultra rockets the popular Special platform to the next level.
The Special 6 Ultra’s added gain stage provides plenty of overdrive for searing leads, bone-crushing crunch, and gristly grind, while its amaz-
ingly effective Watts control can reduce the volume to whisper-quiet bedroom practice levels — while maintaining the same overdriven tone,
texture and dynamic feel. We think you’ll agree — it’s truly amazing.
The Special 6 Ultra features the same unique Volume and Tone controls as the original Special 6, the same footswitchable Boost, High/Low
Power switch, and a similarly mod-friendly eyelet board.
The Special 6 Ultra also features a unique 11-position Depth control that ne-tunes the low-frequency depth and extension. Similarly, the 3-po-
sition Texture switch ne-tunes the high-frequency extension, harmonic content and texture. Inspired by vintage studio EQs like the legendary
Pultec EQP-1A, etc., these innovative tone-sculpting features allow you to precisely ne-tune the amp’s output stage frequency response and
character to perfectly suit a wide range of guitars, pickups, speakers, and musical styles — like a built-in post-production Pultec mastering EQ.
The Special 6 Ultra Combo and Head share the same chassis, circuit design, and component layout.
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VHT 36W Handwired Head • Manual
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VHT SPECIAL 6
ULTRA
FEATURES
CONTROL PANEL FEATURES
6 Watts Maximum Output Power
One 6V6 Output Tube
Two 12AX7 Preamp Tubes
Ultra (high gain) and Clean Inputs
Ultra (high gain) Control
Volume and Tone Controls
Footswitchable Boost Mode
Tube-Driven Effects Loop
Tube-Driven Preamp Line Out
11-Position Depth Control
3-Position Texture Switch
High/Low Power Switch
Watts Control
12” VHT ChromeBack Speaker, 60-watt, 16 ohm (Combo Only)
Switchable 4, 8, or 16 Ohm Speaker Output
Mod-friendly Eyelet-Type Board
Hand-Wired in China
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1. Power Switch: This switch turns the amplier on or off.
2. High/Low Power and Standby switch: The Low-Power (triode mode) setting reduces the amplier’s maximum output power to approximately
one-half of the Full Power (pentode mode) setting. Low-Power mode produces a richer and smoother tone, with earlier breakup than HighPower mode. 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 ½ watt (fully counterclockwise) to 6 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.
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