Ovation Optima Pre-Amp Preliminary Product Specification

Preliminary Product Specification (dated 8/9/94) for the Ovation Mic/Piezo Preamp (Optima). Describes a dual pickup system using piezo transducer and Telex ELM-33 sub-mini condenser mic with crossover circuit design. Includes block diagram (Fig. 1, dated 7/8/94) showing signal flow from piezo/mic inputs through low-pass/high-pass filters, crossover mixer, EQ, and balanced output. Frequency response plots for low-pass and hi-pass filters (dated 08/08/94). Controls: Volume, Blend, Treble (+/-10dB), Bass (+/-14dB), EQ Bypass, X-over (900Hz/1.8KHz), Mid Shape (500Hz, 8dB cut). Interface: 5K Ohm mic input with 9V bias, >5M Ohm piezo input. Outputs: XLR balanced with phantom power, 1/4 inch stereo jack. Chassis similar to OP-24Plus, output PCB same as Optima.