Electro Harmonix Q-Tron Plus manual

Electro Harmonix Q-Tron Plus
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manualElectro Harmonix Q-Tron Plus


Envelope Controlled Filter with External Loop and

“Response” Control

Congratulations on your purchase of the Q-Tron Plus enhanced envelope controlled
filter. It is a very powerful tool for musical expression. Please take a few minutes to
familiarize yourself with the Q-Tron Plus features and controls.
Envelope controlled filters are unique sound modifiers since the intensity of the effect
is controlled by the user’s player dynamics. The volume (also known as the envelope)
of the musician’s notes are used to control a swept filter. As the volume of your notes
changes, so does the peak frequency of the filter.
Gain Control (0-11)– In normal mode, the gain control acts as a filter sensitivity
control and has no effect on the unit’s output volume. In Boost mode, the Gain
control functions as both a volume control and the filter sensitivity control.
Boost Switch (Normal/Boost) – Normal mode passes input signal through the filter at
its original level. Boost mode increases the signal gain to the filter according to the
Gain control setting.
Response Switch (Fast/Slow) – Changes the sweep response between two optimized
settings. “Slow” response creates a smooth vowel-like response. “Fast” response
produces a snappy response identical to the original Q-Tron.
Drive Switch (Up/Down) – Selects the direction of the filter sweep.
Range Switch (Hi/Lo) – Emphasizes vowel-like sounds in low position and overtones
in high position.
Peak Control (0-11) – Determines the resonance peak or Q of the filter. Turning the
control clockwise increases the Q and creates a more dramatic effect.
Mode Switch (LP, BP, HP, Mix) – Determines what frequency range the filter will pass.
Emphasize bass with Low Pass, midrange in Band Pass and treble with the High Pass.
Mix mode combines BP with the dry instrument signal.
Bypass Switch (In/Out) - Toggles between effect mode and True Bypass. When the
Q-Tron Plus is in bypass, the effect loop is also bypassed.
Your Playing Dynamics-The Q-tron Plus’ effect is controlled by the user’s player
dynamics. Strong attack will yield a more dramatic effect, while a softer playing yields
more subtle ones.
The Effects loop allows you to place an additional musical effect between the Q-Tron
Plus’ preamp and filter sections without any alteration of the envelope drive. This
allows the full dynamic response to your playing while greatly increasing the sound
possibilities: Fuzz, soft distortion, echo and chorus, octave divider etc.
When you use an external effect in the Effect’s Loop, the footswitch on the external
effect can control whether the signal is “in” or ”out”. The Q-Tron Plus footswitch will
always switch between the Q-Tron process and the original input signal regardless of
the state of the external effect.
Input Jack- Musical instrument signal input. The input impedance presented at this
jack is 300 k.
Effects Out Jack- Output to amplifier. The output impedance is 250 .
FX Loop Send Jack- Musical instrument signal output to external musical effect. The
output impedance is 250 .
FX Loop Return Jack- From External musical effect output to Q-Tron Plus filter
process. The input impedance presented at this jack is 300 k.
Your Q-Tron Plus comes equipped with a 24 volt DC (inner positive) / 100mA external
power adapter. Use only the power adapter that is supplied! Using the wrong adapter
can cause serious bodily injury and may damage your unit. This will void the
Set all controls to minimum. Connect your instrument to the input jack and your
amplifier to the effect out jack. Optionally connect an external effect to the Effects
Loop. The unit’s power LED should be lit. Set the Q-Tron Plus’ controls to the
Drive Switch: UP
Response Switch: Slow
Range Switch: Low
Mode Switch: BP
Peak Control: Maximum
Boost Control: Normal
Gain Control: Variable*

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