PettyJohn Predrive - Tone Shaping EQ Section; Vari-Z Impedance Switch; Low Cut Knob Operation; High Cut Knob Operation

10 | PREDRIVE USER MANUAL
PETTYJOHNELECTRONICS.COM
TONE SHAPING: EQ SECTION
Vari-Z:
Possibly the most subtle tone shaping function on
the PreDrive, the Vari-Z switch adjusts the input
impedance of the preamp. In the up position,
the pedal is set to 1M ohm, which is the standard
input impedance of an amplier. In the downward
position, the input is dropped by half and replicates
many classic stomp box overdrive pedals. In
general, this will mostly eect the extreme highs
of the tone. Each pickup will respond dierently to
changing this switch but in general, humbuckers like
the higher impedance and single coils like the lower
impedance setting, which can help tame some of
the “zip” and “harshness” that some single coils
have when played hard.
Low Cut Knob:
Turn the Low Cut knob counter-clockwise to tighten
the bass response of the signal.
High Cut Knob:
Turn counterclockwise to reduce the highs in the
tone and reduce harsh tones.