Korpa 
The HT-DISTX allows more tonal adjustment than any other pedal around. The patented ISF (Infinite Shape Feature) circuit gives you infinite adjustment over the characteristics of the tone control network and takes you from the USA to the UK and anywhere in between. So now, for the first time, you can effectively design your own tone and finally find ‘the sound in your head’. This pedal is designed to deliver the most aggressive high gain valve tones that modern guitarists need and the high voltage valve design means all the tones available are extremely dynamic and natural. A no compromise speaker emulated output allows you to get your great guitar tone straight to tape or disk.
Controls
Gain
The Gain control adjusts the amount of overdrive or distortion that the
pedal will deliver. As the Gain control is increased clockwise (CW) the
sound becomes more overdriven moving through crunch tones until,
at its maximum position, a full distorted lead tone is arrived at.
Bass
The Bass control adjusts the amount of low end frequencies in your
tone. This pedal has an advanced tone shaping circuit which allows
the tone to be tight and cutting, counter clockwise (CCW), to warm
and thumping (CW).
Middle
The Middle control adjusts the amount of middle frequencies in your
tone. The middle frequencies are particularly important in getting
the amount of ‘body’ your tone has. With the Middle control set to
its minimum position (fully CCW) the sound will be aggressive and
scooped, this is a tone ideal for aggressive rhythm playing. As the
Middle control is increased (CW) the amount of ‘body’ is increased,
which is more suitable for sustained lead guitar tones.
Treble
The Treble control allows exact adjustment of the treble frequencies
within the sound. At low settings (CCW) the sound will be warm and
darker in character. As the Treble control is increased (CW) the sound
will become brighter. At the maximum settings the sound will be
aggressive and cutting.
ISF (Infinite Shape Feature)
The ISF control works in conjunction with the Bass, Middle and Treble
controls. It allows you to choose the exact tone signature you prefer.
Fully CCW is a more American characteristic with a tight bottom end
and more aggressive middle, and fully CW is a
British characteristic which is more ‘woody’ and less aggressive.
We recommend that to start with the ISF is set to half way and the
Bass, Middle and Treble are set to taste. Then try gradually adjusting
the ISF CW and CCW until you find the sound you prefer.
Level
The Level control sets the overall level or volume from the pedal. It
should be used in conjunction with the Gain control to achieve the
exact type of drive you require. Generally speaking at lower Gain
settings the Volume will be increased and at higher Gain settings the
Volume should be decreased.
Output
This output is for connection to the input of your amplifier or into other
pedals or effects. For best noise performance we recommend you
place the overdrive pedal first in the effects chain. Always use a good
quality screened guitar lead.
Speaker Emulated Output
This output emulates the tonal characteristics of a guitar speaker
cabinet and provides a natural valve overdrive tone for connection
to a recording device or mixing desk. Always use a good quality
screened guitar lead.
Input
Plug your guitar in here. Always use a good quality screened guitar
lead.
10. Valve Viewing Window
Through this grille you can see the ECC83 valve at the heart of your
pedal.
WARNING: Do not attempt to remove the fixing screws or grille. No
user serviceable parts inside.
Effect On/Off LED
When the RED LED is on the pedal is on. When the LED is not on
the pedal is off.
Effect On/Off Switch
Press this switch to turn the effect on or off.
DC Inlet
For the input of the 22V DC / 1
