I have an Aguilar OBP-3 preamp for sale. The OBP-3 will give you expanded tonal range, adding real lows to your bottom and snap to your high end. Even with the tone controls set flat, your pickups will be buffered and keep their clarity even with a long cable run. Also, this preamp has a "big" sound and does not compress the signal like other preamps. The preamp comes pre-wired for active pickups (such as EMG or Warwick MEC Gold) and includes a 9v battery clip. If your bass has passive pickups, this preamp can easily be modified for use with those by just swapping out the 25k stacked volume pot for a 250k stacked pot. The pre-wired 4-knob configuration is: Stacked Vol/Vol-Bass-Midrange-Treble. An OBP-3 preamp prewired as such if ordered new from bestbassgear.com will run you $201. I’m asking $99 plus $5 shipping with payment via PayPal. Please PM me with interest or questions. Thanks for looking!