Fat Bass Tone
J-Core-2B
DESIGNED FOR J BASSES WITH A TOP MOUNT JACK
DIRECT REPLACEMENT FOR STANDARD JAZZ AND SIMILAR BASSES
BASED ON FLEXCORE W/TWEAKS FOR J BASSES
KNOBS INCLUDED
FREE SHIPPING IN THE USA
EXPERT TECHNICAL SUPPORT
IN STOCK MEANS IN STOCK
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.
2 Pickup - 3 Knob (with top mounted jack)
Volume/Tone Stack - Blend - Treble/Bass Stack
J-Core preamp kit includes:
FREQUENCY SPECIFICATIONS
I purchased the Flexcore Mike Pope pre amp a few years ago for My used Fodera bass. It’s fantastic! So when I saw they were doing one for the J Bass I was on Board.
I purchase the Trickfish 2 Band J Bass preamp. Installed it in my Frankistien j bass. Instant improvement in the sound I was looking for, although I miss the midrange tone control that the flexcote has.
Overall I would recommend this preamp as it requires no cutting or modifying my bass. I’m not a lurthier, but even O’l thumbs Jodie installed it without a problem. The biggest thing though is the people at Fat Bass Tone. They sell the best products, are extremely well informed on install, and advise before you make stupid decisions. I am purchasing from them from now on. They will insist your happy with all purchases.
Regards Jodie Hill bassist
Absolutely the best upgrade for a jazz bass . Unbelievable how awesome this preamp is . The highest quality and Super easy install as well. Put this in my Fender Custom shop 66’ Jazz bass keeps the passive tone i love and then ive got the clean punchy tone of the Trickfish magic !
Instantly improved my tone. The five minute install couldn't have been easier. Thanks
Installed in a G&L Pancho Tomaselli and it sounds great. Great to me means a variety of different tones. There is a lot of room for tiny, or very large, tweaks, which I love. So that's what makes it great for me.
The volume pots work really well, super duper fine tuning on both of the volume controls. The blend, middle knob, so far, I tend to keep it directly mid, in perfectly blended position. The best tweaking for this knob is a little out of straight middle. That way you can really hear the blend and how it really effects your tone. All the way, one way or the other is dramatic tonally. Which, you might be going for. However, I feel like the blend knob should not be trifled with. Again, great for me. Thank you Trickfish! And thank you FatBassTone.com! Thomas, Bull Island Instruments, Poq., VA 23662
The best J style drop-in onboard preamp I've ever used. The best quality and ease of installation.
