« An improvement on a classic »Published on 05/27/11 at 07:44
The controls on the OD-9 Pro+ are basically the same as most over drive pedals. It has a Drive knob a Tone knob and a Level knob. Something different it has is an extra little boost knob. The boost knob increases the midrange and drive level to make a thicker tone that is more compressed and sustains more. The Pro+ has an internal dip switch which is accessed under the battery cover. With this switch you can select 9 or 18 volts operation through an on board DC voltage doubling circuit.
With the drive control cranked and with the boost mode on the OD-9 Pro+ is best used with a clean amp. It sounds a lot like a Tube Screamer. It has really in your face mids that can be used for blues or rock. With the boost off and lighter overdrive it sounds a bit like a fender blackface. The tone control can be used to balance out bright amps and make the sound better. The 9 or 18 volt selector also can change the sound. If you change it to 18 volts the overdrive becomes bigger and more dynamic. It is more open sounding. 9 volts provides a more traditional Tube Screamer sound.
Maxon has been making overdrive pedals since the 70s. Many of the classic overdrive tones you have heard over the years probably came from a Maxon or a Tube Screamer manufactured by Maxon. If you are looking for an evolution of that classic overdrive pedal sound the OD-9 Pro+ overdrive may be what you are looking for.