Preamp

OP-24+

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.