Q-Tron
Envelope Controlled Filter
– OPERATING INSTRUCTIONS —
Congratulations on your purchase of the Q-Tron envelope controlled filter! You have purchased
a very powerful tool for musical expression. Please take a few minutes to familiarize yourself
with the Q-Tron’s controls and how they work.
Envelope controlled filters are a unique type of sound modifier where the intensity of the effect
is controlled by the user’s playing dynamics. The volume (also known as the envelope) of an
incoming audio signal is used to control a swept filter. As the volume increases or decreases so
does the pitch of the filter.
— CONTROLS —
Drive Switch (Up/Down) — Selects direction of filter sweep.
Range Switch (Hi/Lo) — Emphasizes vowel-like sound in low position and overtones in high position.
Gain Control (0-11) — Functions as both volume control and a filter sensitivity control in boost
mode. In Normal mode the Gain control acts as a filter sensitivity control and has no effect on
the unit’s output volume.
Boost Switch (Normal/Bass boost) — Normal mode disengages internal pre-amp, Boost mode
activates it. Also determines function of Gain control (see above).
Peak Control (0-11) — Determines frequency peak of filter. This control will create a more
dramatic effect when turned clockwise.
Mode Switch (LP, BP, HP, MIX) — Determines what frequency range the filter will sweep in.
Emphasizes lows in Low Pass, midrange in Band Pass, treble in High Pass. Mix mode combines
BP with dry instrument signal.
Bypass Switch (in/out) — Disengages effect.
Lastly, the
will yield a more dramatic effect, while softer playing will yield more subtle effects or none
at all.
Q-Tron’s effect c
an be controlled by the user’s playing dynamics. A strong attack
— OPERATION —
Your unit comes equipped with a 24-volt/100mA tip positive, external power adapter (European
models come equipped with a 24v DC/30mA tip positive adapter). Use only the power adapter
supplied. Using the wrong adapter can cause serious bodily injury. Using the wrong adapter
may also damage your unit and will void the warranty.
Make sure all controls are set at minimum. Connect your instrument to the
amplifier to the effect out jack. The unit’s power LED should be lit.
Set the Q-Tron’s controls to the following:
Drive Switch: Up
Range Switch: Low
Mode Switch: BP
Peak Control: Maximum
Boost Switch: Normal
Gain Control: See Below
Vary the Gain control until the Overload indicator LED lights on most of the notes you play. If no
effect is noticeable, depress the Bypass switch to engage the effect. With this setting the user
should be able to approximate the sound of a conventional wah wah pedal. Experiment with
this setting to see how the
Adjusting the Gain and Peak controls will vary the amount and intensity of the effect. For tonal
variations adjust the Range, Mode, and Drive controls.
To attain an effect similar to an original Mutron III, set the Q-Tron’s controls to the following:
Drive Switch: Down
Range Switch: Low
Mode Switch: BP
Peak Control: Maximum
Boost Switch: Boost
Gain Control: See Below
Q-Tron reacts to playing dynamics.
input jack and your
Vary the Gain control until the Overload Indicator LED lights on only the loudest notes you play.
Increasing the Gain will saturate the filter, yielding those famous, “chewy” Mutron-like sounds.
Adjusting the Peak control will vary the intensity on the effect. For tonal variations, adjust the
Range, Mode, and Drive controls.
— OPTIONS FOR USE —
Due to the Q-Tron’s extended frequency response, it can be used with a wide variety of
electronic instruments. Here are some setting tips for use with different instrument types:
Range Control — Lo Range is the best for rhythm guitar and bass. Hi range is best for lead
guitar, brass, and wind use. Both ranges work well with keyboards.
Mix Mode — Works especially well with bass guitar (May require higher peak settings).
Drive Switch — Down Drive works well with bass guitar. Up Drive is best with guitar and keyboards.
The Q-Tron can also be used in conjunction with other effects pedals. Here are some
interesting combinations:
Q-Tron and Big Muff distortion — Place the distortion af
The use of distortion will dramatically increase the intensity of the Q-Tron’s effect. You can also
place the Distortion before the Q-Tron, but this combination tends to flatten the dynamic
response range of the effect.
Q-Tron into another Q-Tron — Try this one with one unit in the Up Drive position and one in the
Down Drive position.
Q-Tron and octave divider — Place the octave divider before the Q-Tron in the signal chain.
Make sure to use an octave divider which maintains the natural envelope of the signal. This
combination will yield sounds similar to an analog synthesizer.
As always, experiment to achieve your own unique sound. When used properly, the
provide a lifetime of playing pleasure!
ter the
Q-Tron in the signal chain.
Q-Tron will
– WARRANTY INFORMATION –
Please complete and return the enclosed warranty card within 10 days of purchase.
We will repair the unit for free within one year of date of purchase. If you should need to
return your unit for service within the warranty period, please include a brief description of
the problem as well as you name, address, telephone number, copy of your receipt, and a
check or money order for $5.00 shipping and handling to:
Electro-Harmonix
C/O New Sensor Corporation
32-33 47th Avenue
Long Island City, NY 11101
Att: Service Department
Please make checks/money orders payable to New Sensor Corporation.
To hear demos by rock stars on all EH pedals visit us on the web at
Email us at info@ehx.com
www.ehx.com.
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