Pre Amp Wiring Diagrams. This video explains connecting pre to power amp especially for vintage stereo and sound improvements. Wiring diagram obp 2 2 band boostcut 9 or 18 volt on board preamp the obp 2 was designed to give bassists fat tone while being small enough to fit into tight control cavities.
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Wiring diagram obp 2 2 band boostcut 9 or 18 volt on board preamp the obp 2 was designed to give bassists fat tone while being small enough to fit into tight control cavities. Wire this preamp with one 9 volt battery and it will fit into just about any instrument. Phono preamp wiring diagram. Yellowwhite connect together.