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J-Core-2B

Trickfish J-Core 2 Band Bass Preamp for Jazz Bass®

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Measuring Tool Bullet IconDESIGNED FOR J BASSES WITH A TOP MOUNT JACK

Puzzle Bullet IconDIRECT REPLACEMENT FOR STANDARD JAZZ AND SIMILAR BASSES

Original Bullet IconBASED ON FLEXCORE W/TWEAKS FOR J BASSES

Configuration Bullet IconKNOBS INCLUDED

 

empty box iconFREE SHIPPING IN THE USA
configuration iconEXPERT TECHNICAL SUPPORT
checklist iconIN STOCK MEANS IN STOCK

 

 

DESCRIPTION

The J-Core preamp takes Trickfish's widely acclaimed Flexcore Onboard Bass Preamp to the next level - now in a hassle-free Jazz Bass plate drop-in design. No modifications, no soldering, just pure performance.

Powered by the incredibly flexible and supremely musical Mike Pope-designed preamp with a 2-band EQ, the J-Core puts tonal control at your fingertips.

All this, plus a 9-volt battery, fits neatly into your existing Jazz Bass control cavity. Effortless design meets exceptional sound.

A hallmark of a truly versatile Jazz Bass is its passive tone control. Some players prefer a subtle tone roll-off that preserves midrange presence, while others lean toward a darker, more classic passive tone. The J-Core comes stock with a .022 Cap and can be easily customized with an additional through-hole parallel capacitor.

For years, the Flexcore has set the benchmark for players seeking unparalleled fidelity, clarity, and warmth from their active instruments. Until now, however, it wasn’t available as a drop-in replacement for Jazz Basses.

With the J-Core, you can finally bring the renowned flexibility and performance of the Flexcore into the Fender universe — elevating your sound without changing what you love about your instrument.

CONFIGURATION

2 Pickup - 3 Knob (with top mounted jack)
Volume/Tone Stack - Blend - Treble/Bass Stack

TECH & SPECS

J-Core preamp kit includes:

  • Prewired Output Jack
  • Battery Connector Clip
  • Preinstalled on a Jazz Bass Control Plate
  • Black Aluminum Knobs (2 Stacked & 1 Single)


FREQUENCY SPECIFICATIONS

  • Treble: +/- 15dB at 6kHz or 10kHz
  • Bass: +/- 12dB at 46Hz or 90Hz

Customer Reviews

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William Stewart
Trickfish J Core 2 Band Bass Preamp

The best J style drop-in onboard preamp I've ever used. The best quality and ease of installation.

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