Aguilar OBP-3 2-Pickup 4-Knob 1-Switch 3-Band Vol - Vol - Mid - Treb/Bass Stack - Mid Sw

SKU:BBG 1431


  • 3-Band: 2-Pickup, 4-Knob, 1-switch
  • Vol - Vol - Treb/Bass Stack - Mid - Mid Switch
In Stock - Made to Order

We build and test our pre-wired preamp assemblies by hand. These usually ship within a few days. Please contact us first if you have a tight deadline. We will do our best to accommodate you.

Note: These will be delayed in production and shipping until sometime the week of March 4th.


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Control Configuration

  1. Volume
  2. Volume
  3. Treble/Bass stack
  4. Mid
  5. Mid Switch


The Aguilar OBP-3 was built from the ground up to be the ultimate source of full-bodied tone, transparency, and versatility for your bass.

Three bands of boost/cut and a selectable midrange frequency provides flexibility to dial in just the right tone. The treble control delivers up to 16dB of boost/cut at 6.5Hz and captures the dynamic of a "Passive Tone Control" when rolled off. The powerful midrange control offers user selectable frequencies of 400 or 800Hz, each with a full 16dB boost/cut capability. The midrange retains constant bandwidth in any setting so there is no "muddy" frequency overlap. The bass control features a boost/cut of up to 18dB at 40Hz, adding Aguilar's signature thickness to any instrument.

The Aguilar OBP3 is compatible with most major manufacturer’s pickups both active such as EMG®, Warwick® MEC, and passive as we build them in house and impedance match the controls, and its small size makes it an easy retrofit in almost any bass. Combining high headroom and low noise, the OBP-3 is unmatched in providing tonal flexibility while retaining the true character of any bass!

Tonally these preamps are aggressive, clear, transparent and have emphasis with the low and low midrange being warm, and with the top end 'presence' like. These preamps do not have gain control onboard.

Use of 9v or 18v power is possible as we build the prewires in house to suit your power requirements. 18v grants an additional 6dB of headroom.

Technical Specifications

  • Bass: +/- 18dB @ 40Hz
  • Midrange: +/- 16 dB @ 400Hz or 800 Hz. User selectable frequency center.
  • Treble: +/- 16dB @ 6.5 KHz
  • Input Impedance: 1 Mega Ohm
  • Output Impedance: 100 Ohm
  • Battery life: Estimated 324 hours

Question: Where Can I Buy an Aguilar OBP-3 2-Pickup 4-Knob 1-Switch 3-Band Vol - Vol - Mid - Treb/Bass Stack - Mid Sw?

Answer: You can buy this from Best Bass Gear by Calling 877-839-3531 or Emailing us at or chatting with our Bass Techs


Rate and Review this item
Verified Buyer
Aguilar OBP-3 pre-amp was the best upgrade i could have made to my bass
By Bass_Player_Brandon
I wasn't a big fan of the Stock Spector Tone Pump Pre-amp. it's a 18db boost to bass and treble but no option to cut. while recording, the signal would come through to hot. Not to mention the pots didn't feel smooth, they felt a bit cheap. I have two other Spector basses with the Aguilar OBP-2 pre-amp and very much love the feel/sound. I decided to go with the OBP-3 simply for versatility. having the option to boost or cut my bass mids, and treble has been great for recording. i decided to get a mid switch as well for some fat slap tones on the fly. a big thank you to BBG for the amazing wiring job. my bass tech was pleased that you guys included detailed wiring instructions/diagram. highly recommend to anyone looking to make their bass sound the best it can be.