Ovation OP-24 Plus Pre-Amp Schematic

Single-page preamp schematic for the Ovation OP-24 Plus onboard guitar preamp (without tuner). Features JFET input buffer (2N5457), 3-band EQ (bass with boost/cut, mid with switchable 400Hz/800Hz center frequency and boost/cut, treble with boost/cut), preshape switch, volume control, EQ bypass, and low battery LED indicator. Uses a single TL064 quad op-amp for all EQ stages. Simpler design than the OP-24 Plus C/E variants which include an integrated tuner. Schematic Rev 2, designed by Richard Davis for Ovation Instruments.