Overdrive effect pedal that is Maxon’s version of classic TS-9 Tube Screamer and features the same, original circuitry, yet with addition of true bypass switching. It delivers the tone that made Stevie Ray Vaughan famous. Like the original, it features the NJM (JRC) 4558D Op Amp – an essential component for authentic “TS” tone. The NJM is smoother sounding and less compressed than other Op Amps, offering superior sound quality with low noise. The absence of the FET switching circuit gives the OD-9 some added output and a slightly more open sound than the OD808, making it perfect for the classic rock tones that it helped to define. Pedal provides Drive and Level controls for adding the intensity and volume, Hi Boost/Hi Cut tone controls for adjusting brightness and AC/DC operation (9V battery or adapter). Weight: 580 g.