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Explaining the aguilar onboard preamps for the Bass

2020-12-24

Theme:Guitars

The aguilar brand from New York is well known for its pickups and built-in preamps in addition to Bass amps and effectors. They are often used in expensive Basses, and I get the impression that many professionals use also use them. My favorite Bassist, Francis Rocco Prestia, also loves the astringent LTD Bass with the aguilar active PU system. This time, I would like to introduce the onboard preamplifier for Bass from such the talented aguilar brand.

All current built-in preamplifiers from this brand come with pots! It's easy because you don't have to worry about the resistance value when considering the combination with the preamplifier. The products are roughly divided into (1) OBP-1, (2) OBP-2, and (3) OBP-3. The general features are described below.

① OBP-1

2-band EQ boost only
・Bass / Treble can boost up to 18db each

② OBP-2

2-band EQ boost / cut
・Bass(40Hz) ±18db
・Treble(6.5KHz) ±16db

③ OBP-3

3-band EQ boost / cut
・Bass(40Hz) ±18db
・Mid(400Hz or 800Hz) ±16db
・Treble(6.5KHz) ±16db

In addition to these, TK or SK, PP Kit or Kit are added after each model name. PP Kit: Push/Pull pot (Mid)
Kit: Mini toggle switch (Mid)
TK: 2 pots (Bass and Treble)
SK: Stack pot 2-axis double pot (Bass / Treble)

As mentioned in the series introduction above, Mid can be switched between 400Hz and 800Hz. The 3-band EQ type can be wired so that the frequency band can be switched with the included Push/Pull pot or mini toggle switch. I set it to 400Hz when I want to control the warmth of the tone, and 800Hz when I am aware of sound penetration, which is a little more noticeable. The remaining Bass and Treble can be controlled by two independent pots or the 2-Axis double stack pot.

Even if you install a new built-in preamplifier, you want to avoid having to alter the body of the instrument as much as possible. Passive-Bass activation is difficult due to limited capacity. The aguilar preamplifier has a wide variety of pot combinations, so it saves as much space as possible while creating a wide variety of sounds.

The product lineup is summarized in the table below.

Product name
Feature
2-band EQ
Boost only
Pot×2
2-band EQ
Boost only
2-Axis double pot×1
2-band EQ
Boost / Cut
Pot×2
2-band EQ
Boost / Cut
2-Axis double pot×1
3-band EQ
Boost / Cut
Pot×2
Push/pull pot(Mid)×1
3-band EQ
Boost / Cut
Pot×3
Mini toggle switch(Mid)×1
3-band EQ
Boost / Cut
2-Axis double pot×1
Push/pull Pot(Mid)×1
3-band EQ
Boost / Cut
2-Axis double pot×1
Pot(Mid)×1
Mini toggle switch(Mid)×1

As a characteristic of the sound, although this is a personal impression, I feel that the EQ control works well. And the noise level is really low. Even if you don't prepare a separate preamp pedal, you can manage the level. Recommended for those who do not want to carry around a pedal or who are not satisfied with an equalizer with a natural effect.

In addition, there is a wiring diagrams on the manufacturer's site, which is very easy to understand when installing it yourself. Please check them out.

OBP-1
OBP-2
OBP-3

Nakagawa Hiroko

2020年入社

AGUILAR / OBP-1TK

AGUILAR

OBP-1TK

¥14,700(excl. tax)¥16,170(incl. tax)

Bass Preamp includes separate treble and Bass pots

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AGUILAR / OBP-1SK

AGUILAR

OBP-1SK

¥14,800(excl. tax)¥16,280(incl. tax)

On board Preamp, Stack type

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AGUILAR / OBP-2SK

AGUILAR

OBP-2SK

¥14,800(excl. tax)¥16,280(incl. tax)

On board Preamp, OBP-2SK kits include a stacked treble/Bass pot

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AGUILAR / OBP-2TK

AGUILAR

OBP-2TK

¥15,800(excl. tax)¥17,380(incl. tax)

On board Preamp, OBP-2TK kits include separate Treble and Bass pots

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AGUILAR / OBP-3SK Kit

AGUILAR

OBP-3SK Kit

¥18,500(excl. tax)¥20,350(incl. tax)

Bass Preamp

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AGUILAR / OBP-3SK/PP Kit

AGUILAR

OBP-3SK/PP Kit

¥18,800(excl. tax)¥20,680(incl. tax)

On board Preamp, OBP-3SK/PP kits include stacked Treble/Bass pot

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AGUILAR / OBP-3TK Kit

AGUILAR

OBP-3TK Kit

¥17,300(excl. tax)¥19,030(incl. tax)

Bass ON BOARD FET Preamp

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AGUILAR / OBP-3TK/PP Kit

AGUILAR

OBP-3TK/PP Kit

¥18,800(excl. tax)¥20,680(incl. tax)

On board Preamp, OBP-3TK/PP kits include separate Treble, Mid, and Bass

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