Aguilar PREAMPLIS BASSES OBP 3 BDES TREB MID BASS POTS+MINI TOGGLE
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Essential Information About the Aguilar OBP-3 Preamp
Essential Information About the Aguilar OBP-3 Preamp
- Ultra-comprehensive 3-band EQ : Bass, Mid, and Treble to precisely sculpt your bass tone.
- Switchable Mids : Mini-toggle to choose mid frequencies (400 Hz or 800 Hz) depending on the mix and style.
- Large headroom reserve : Operates at 9V or 18V, with an additional 6 dB at 18V for more dynamics.
- Compact format : Designed for easy integration in onboard electronics while remaining highly performant.
Manufacturer Information
Aguilar
https://www.aguilaramp.com
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Algam SAS
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An Aguilar Preamp Designed for Versatility, at the Heart of the OBP Range
In the world of onboard bass preamps, the OBP-3 is often chosen when you want to go beyond a simple boost: it's a tone-shaping tool capable of delivering both definition and power. Its active 3-band EQ allows you to instantly adapt your instrument to the room, amp, cabinet, or direct input, with a simple and musical logic. This is typically the kind of electronics that transforms a passive bass into a stage machine, while still being refined enough for studio use.
Who Is It For? Demanding Bassists, From Studio to Live
The Aguilar OBP-3 is aimed at bassists who need real tonal control without relying solely on the amp. It suits both intermediate musicians who want to better establish their place in the band and seasoned bassists seeking responsive and coherent electronics across different contexts.
Regarding styles, its EQ range makes it relevant for funk (attack and snap), rock (present low-mids), metal (targeted mids to cut through), gospel (wide and clean low end), as well as pop and session work where you need to switch from a round sound to a more modern tone with a single adjustment.
Technical specifications
| Category | bass preamp | EQ | 3 channels |
| Technology | Solid state | ||
Questions frequently asked
Can the Aguilar OBP-3 preamp operate at 9V or 18V?
The power supply accepts both 9V and 18V. At 18V, the additional gain provided is 6 dB. This setup offers more headroom for high-output pickups and strong low frequencies.
How are the mid frequencies selected on the OBP-3?
A black mini-toggle switch allows selection of the mid frequency center between 400 Hz and 800 Hz. The mid EQ provides a boost/cut range of ±16 dB.
What EQ controls are available?
Three separate knobs control bass, mids, and treble: ±18 dB at 40 Hz for bass, and ±16 dB at 6.5 kHz for treble.
What cavity dimensions should be allowed for the bass electronics?
The circuit measures 25 x 25 x 15 mm.
What is the power consumption and battery life with a 9V battery?
Estimated current draw is about 1.5 mA. Battery life is rated at up to 324 hours with a 9V battery.



