Ovation OptiMax Pre-Amp Schematic
preamp
Ovation OptiMax
9V battery / 48V phantom power
1990s
US
8 components
3 diagrams
Three-sheet circuit schematic (Dwg 42-210a/b/c, Rev 1) for the Ovation OptiMax guitar preamp. Includes piezo buffer/preamp with low-pass filter, microphone buffer/preamp with high-pass filter, crossover mixer, bass EQ (+/-14dB), treble EQ (+/-10dB), mid-shape preshape, EQ bypass, volume control, phantom power supply, and balanced XLR output board. Drawn by N.M., checked by b.h., dated 8/16/94.
Components
TL064 quad op-amp
1N4001 rectifier diode
1N5817 Schottky diode
1N4741A 11V Zener diode
33178 op-amp
piezo transducer
condenser microphone
bipolar LED indicators