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Aguilar OBP-3SK Onboard Bass Preamp   

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3-band EQ with 18dB of boost/cut at 40Hz, 400 or 800Hz (selectable by toggle switch, and 6.5kHz, can be installed as 9 or 18 volt circuit, 1" x 1" x ...Read More

Available 10-11-2016

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3-band EQ with 18dB of boost/cut at 40Hz, 400 or 800Hz (selectable by toggle switch, and 6.5kHz, can be installed as 9 or 18 volt circuit, 1" x 1" x .6", Includes stacked treble/bass pot, midrange pot and toggle switch for midrange frequency selection.


Review Snapshot

by PowerReviews
AguilarOBP-3SK Onboard Bass Preamp

(based on 2 reviews)

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Reviewed by 2 customers

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Very happy with this preamp.

By Mike

from Vancouver Island, Canada

About Me Experienced

Verified Buyer


  • Excellent Sound
  • Good Warmth
  • Powerful


    Best Uses

      Comments about Aguilar OBP-3SK Onboard Bass Preamp:

      I replaced the passive tone controls on a bass that had weak lows, but good mids and tons of treble, and got great results. Plenty of bottom end now, and the mids control can give lots of resonance. You need to know what you're doing to install it yourself though, and you do need to buy knobs for the pots. I used a special switch to select mid freqs of 200, 400, or 800 Hz, but using the stock switch and 400/800 (the basic wiring option) would have been fine. If, for cosmetic reasons, you really wanted to omit the switch, you could just wire it for 400 Hz.

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      (2 of 2 customers found this review helpful)


      Aguilar OBP3-SK 18V Bass Preamp

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      By paul purtle

      from branson mo

      Comments about Aguilar OBP-3SK Onboard Bass Preamp:

      A great preamp oveerall, makes your bass sound like a $2000 bass, maybe better
      When I bitched about the low outpurt of the pickups on my Yamaha BBN5, everybody implored me to install the Aguilar preamp if I liked the tone of my bass. The results were more than impressive: way more highs for my Marcus slap stuff, way more lows, variable mid knob. So many possible variations.I was running my GK800 at about 7. The speakers in my vintage SWR cabinet were moving all over the place. That stopped immmediately after installing the preamp; plus, I can't put my volume knob over 4 now. It's just to solid and loud. Incredible. And all of this coming from a bottom line bass that you can get on eBay for $200. A little routing, a bone nut, and you'll have a bass that plays great, sounds great, and will get you compliments from every sound man and bass player who hears you. For the record I tried pasive Bartolini Jazz pickups. They sucked compared to the stock Yamahas. Less volume, choked sounding. I ended up selling them to my roommate.
      My only complaint is the stacked knobs start getting little sloppy.
      I think these are comptetive with other quality preamps.

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