Ovation Preamps

OP-24+ Preamp Assembly

Offering whisper-quiet audio circuitry with very low distortion, the OP-24+ features 3-band EQ with a bypass switch, a Mid-Shift control for selecting a midrange center frequency of either 400 Hz or 1 kHz, a Pre-Shape circuit for boosting bass and treble response while cutting rumble-prone frequencies below 40 Hz, and a battery status light. To provide complete control over the high-output preamp signal, the OP-24+ has a custom-taper volume slider.


  • Current Draw: 5mA @ 9VDC
  • Flat Ref. Level: -7.5dB
  • Freq. Response: 20Hz-20KHz (± 0.5dB)
  • Signal to Noise: EQ bypass: - 91dB EQ in w/flat setting: - 89dB EQ in w/max High: - 84dB
  • EQ Response: Low: ± 13dB @ 80Hz Mid: ± 12dB @ 400Hz ± 6dB @ 1KHz (shift) High:
  • Output: Max. Level @ 10K Ohm: 4Vp-p 1.4VRMS
  • THD: < .28% @ 500mV input
  • Tuner "On" Time: 30 Seconds
  • Tuner Accuracy: n/a
  • Low Battery "ON" voltage: 7.7V


Model Name: OP-24+ Preamp Assembly
Series: Ovation Preamps
Color: Black