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JT01-CCC-VV

John East J-Tone 2 Band Bass Preamp

Puzzle Bullet IconDROP IN REPLACEMENT ON MOST JAZZ BASSES®

Wrench Bullet IconEASY INSTALLATION - TYPICALLY NO SOLDERING REQUIRED

Data Science Bullet Icon2 BAND ACTIVE EQ & FULLY PASSIVE MODES

Battery Bullet IconOPERATED BY A SINGLE 9V THAT FITS UNDER PREAMP

 

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

 

 

DESCRIPTION

The J-Tone is a new on board preamp with a fully passive signal path and a high spec professional active preamp. It is designed to fit directly into any jazz style bass without the need for invasive modification to the instrument. In passive mode, the original jazz style bass is fully maintained since the signal path is a replica of those in the original Jazz.

The J-TONE pre amp was created to replicate the authentic original passive wiring of the J style bass with a high spec Active EQ. It’s designed as a direct drop-in replacement, including a place for the battery. It’s easy to fit at home using basic tools, no soldering, no physical changes to the instrument.

The Active EQ is simplicity itself, incorporating highly responsive bass and treble controls, taken from the John East high end UNI-PRE system. Internal edge wheels allow individual custom voicing for both the bass and treble control spectrums. Instrument qualities can be enhanced in conjunction with tone-shaping to match playing styles.

CONFIGURATIONS

Volume/Volume Stack -- Treble/Bass Stack -- Passive Tone with Active-Passive Push-Pull

Volume/Blend Stack -- Treble/Bass Stack -- Passive Tone with Active-Passive Push-Pull

TECH & SPECS

  • Class A FET input stage for great sound quality, with master gain trim preset adjuster.
  • Highly responsive Bass and Treble control adjustments in active.
  • Frequency Wheels to set the width of the bass and treble spectrums individually.
  • Passive Tone is always operational, in both active and passive.
  • Passive Tone has plug-in tone cap to allow easy swapping of the cap value for different roll-off frequencies.
  • Bass control can be set as boost/cut or boost only, with an internal jumper link setting.
  • Screw terminals for all external connections – pickups and grounding, for easy installation.
  • To ensure correct sizing: check that a 9V battery drops into the cavity close to the jack, and that there’s a depth of 32mm.
  • Design allows 9V Battery to mount beneath the preamp in a standard J style bass.


  • PASSIVE MODE:Neutral at response in accordance with passive control settings.
  • ACTIVE MODE: Neutral at response when Bass & Treble controls are set to their centre clicks.
  • GAIN TRIM: Internal Trimmer 0-12dBs setting overall gain of active circuit.
  • BASS CONTROL: +/- 18dBs Cut/Boost with internally adjustable shelf frequency 40 - 200Hz.
  • TREBLE CONTROL:+/- 18dBs Cut/Boost with internally adjustable shelf frequency 1kHz - 7.5kHz.

J Tone User Manual


Customer Reviews

Based on 7 reviews
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O
Obed Valdez
Asome Preamp

First of all, bass sounds completely different even with cheap pickups. I will eventually upgrade the pickups. Buy it you will not regret it.

K
Kevin Torgalson.net
East J-Tone 2 Band Pre

There is no better drop-in pre for a Fender J. Flexible eq points for bass and treble? Yes! Amazing! Deep and wide to punchy low end, lower treble to super sweet upper treble snappy top end. No soldering? Yes! Amazing! What is typically "missing" in a passive J bass (extension in the depth and upper frequencies) is here, and all with a passive tone control that works in active and passive mode. Can be ordered with master volume and pickup pan, or two volumes and tone control (as a standard J bass - best layout for tone flexibility). Comes with extra capacitors which can be simply "plugged in". The standard cap installed, (in my opinion) is perfect, when rolled off, it is beautifully dark and furry yet clear as a velvet covered bell. A better, more flexible (as well as simple drop in/no solder) 2 band pre simply doesn't exist (nor need it exist).

A
Angus C Whyte
Easy Transaction, Fast Delivery

The Fat Boys did it again!
I asked them to stock one of these, they did, I bought it, it's great.
Will buy from FBT again.

D
Dwaine Wright
Perfect addition

JTone is a perfect addition to my JBass. True bypass is a must-have.
JBass doesn't need much help so I use true bypass half the time but use active tone shaping whenever necessary. Great product requiring no mods to instrument cavity.

J
John Jacobs
Great preamp

Great sounding preamp. I am looking forward to using different tone caps for different scenarios. Quick fulfillment from FBT! The preamp didn’t fit into the control cavity of my bass so I had to route it deeper, wider and longer, so it wasn’t a zero mod install but it was easy and worth it.

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