Ovation OP-4DT Preamp Owner's Manual

This is the official Owner's Manual for the Ovation OP-4DT preamp system, designed for Ovation Acoustic/Electric guitars. The manual covers the preamp's features including Gain control, three-band EQ (Bass, Mid, Treble), built-in chromatic tuner with display indicators, and operation instructions. Technical specifications are also provided, including frequency response data, S/N ratio, and piezo output measurements, published by GEWA music GmbH of Germany.