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Pre-owned in excellent condition, comes with original box.

SM9Pro+ was developed based on the distortion core of Maxon SM9 (Super Metal 9).
Original SM9 was sold just after NWOBHM which created a big boom in the late 1970s.
SM9Pro+ creates scooped heavy metal tones with high-level gain circuitry and cut midrange circuitry.
Wide range of setting from NWOBHM to current heavy rock / loud rock using drop D tuning is available
with simple four control knobs.
Operating voltage (9V or 18V mode) is switchable via an internal slide switch accessible through
the unit’s battery compartment.
In new power-saving circuitry for SM9Pro+, DC to DC converter only operates at 18V mode.
When 9V mode is selected, DC to DC converter does not operate, and SM9Pro+ operates with battery or
AC adaptor directly.
There is no power consumption for DC to DC converter, which makes battery life last longer.
SM9Pro+ has increased dynamic headroom with internal operating voltage set at 18V.
Stable high-quality sound is available as unintentionally-generated distortion is significantly

Maxon SM9Pro+ Super Metal Distortion Pedal Pre-Owned