I have an Aguilar OBP-1 preamp for sale. The preamp comes with the bass and treble pots pre-wired and includes the wiring diagram and a harness for dual 9 volt batteries. I’m asking $79 including shipping with payment via PayPal. Please PM me with interest. Thanks for looking! OBP-1 2 BAND, BOOST 9 OR 18 VOLT ON BOARD PREAMP The OBP-1’s boost-only design gives you the tone shaping benefits of active electronics without losing the inherent sound of the instrument. The OBP-1’s discrete, all-FET circuitry features up to 18dB of boost at 40Hz and 4kHz, creating a sonic environment high in dynamic headroom and low in noise. OBP-1 FEATURES All FET design Two bands of boost Maximum amount of boost: 18db, occurring at 40 Hz for the bass, and 4kHz for the treble Output impedance: 600 ohm Dimensions: 0.98W” x 0.98L” x 0.59D” OBP-1TK: Includes separate Treble and Bass pots.