Electro-Harmonix CNTL KNOB Installation manual

CNTL KNOB

Dual Static Expression Knobs

Congratulations on your purchase of the Electro-Harmonix Cntl Knob! The
Cntl Knob is a compact, easy-to-use utility pedal providing remote static
knob control for devices with expression control jacks. With the Cntl
Knob, the user can set two preset values, representing two positions of a
traditional expression pedal. Use the Cntl Knob’s onboard footswitch to
toggle between the two knob settings.

It works great with any device featuring an expression pedal input,
including the Electro-Harmonix Grand Canyon® Delay and Looper, Oceans
12® Dual Stereo Reverb, Superego+™ Synth Engine, Super Pulsar™
Tremolo and many other pedals and devices made by Electro-Harmonix
and other manufacturers.

-USING THE CNTL KNOB-

Connect the supplied Tip-Ring-Sleeve (TRS) cable to the Cntl Knob’s jack
and to the expression jack on the device you want to control. We
recommend the device be powered down while making the connection.
Connect an optional 9VDC, center-negative power supply to the 9V power
jack at the top of the Cntl Knob for LED indication. 9V power only lights
the Cntl Knob’s LEDs. Power is not required to use the expression knobs.

The Cntl Knob has 2 Expression knobs, 1 footswitch and one pushbutton
for TRS polarity. They work as follows:

EXP 1 Knob – The position of this knob determines the first expression
setting. The fully counter-clockwise position corresponds to the heel
position on a standard expression pedal while the fully clockwise position
corresponds to the toe position.

• The EXP 1 knob setting is active on the EXP OUT jack when the

LED located below the EXP 1 knob is lit.

EXP 2 Knob – The position of this knob determines the second
expression setting. The fully counter-clockwise position corresponds to
the heel position on a standard expression pedal while the fully clockwise
position corresponds to the toe position.

• The EXP 2 knob setting is active on the EXP OUT jack when the

LED located below the EXP 2 knob is lit.

EXP OUT Jack – This jack outputs the expression value set by the
currently active knob. A TRS (tip-ring-sleeve) cable is required for this
jack. Please do not connect a TS (tip-sleeve) cable to the EXP OUT jack; it
will not work and may cause damage to your equipment.

TRS +/- Button – When this button is in the inward position, the
polarity of the EXP OUT jack is Ring-to-Wiper. When this button is in the
outward position, the polarity of EXP OUT is Tip-to-Wiper.

• This button must be set to comply with the expression polarity of

the device that is being controlled. Please check the user manual
of the device for the required expression polarity.

• For all EHX products, such as the Deluxe Big Muff Pi

®

, Deluxe
Memory Boy™ Analog Delay and Pitchfork® Pitch Shifter, this
toggle should be in the outward position (Tip-to-Wiper polarity).

Footswitch & LEDs – A press on the footswitch toggles the active
expression setting on EXP OUT between EXP 1 and EXP 2. If power is
applied, the LEDs below each knob light to indicate the currently active
knob.

9V Power Jack – An optional 9VDC, center-negative power supply can
be inserted to provide power to the LEDs at this jack. The current draw is
5mA. The maximum acceptable DC voltage for this power supply is
18VDC. The Cntl Knob does not take batteries.

Please note: the exact function of the Cntl Knob expression setting
depends on the device to which it is connected. Please refer to the
device’s user manual for more information on the functions assigned to
the expression input.