Hot Stack® Jazz Bass

$115.00

available

The Hot Stack Jazz Bass (STK-J2) is a noiseless pickup that will deliver increased output and a fatter tone for any 4-string Fender American Standard Jazz Bass.

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TECH SPECS

DCR – Short for DC Resistance, is measured in Ohms and is the total resistance of the copper wire wound around a coil form. The length of the coil form, the number of turns and the gauge of wire all affect the DCR reading. DCR is often used as a gauge of output because as the turns increase, so does the output, though magnet type and the coil geometry also influence output.
Magnet – We use several different magnet formulations: Alnico 2, Alnico 3, Alnico 4, Alnico 5, Alnico 6, Alnico 8 and Ceramic 5/8. In the case of pickups, the most significant characteristic is the gauss strength, which is a measure of the density of the magnetic field. Of the magnets we use, Alnico 3 has the lowest gauss strength. From there in order of ascending strength you have A2, A4, A5, A6, Ceramic and A8. As the gauss strength goes up, so does the output. The magnets at the lower end of the scale tend to produce a softer attack and a degree of “bloom” to the envelope of the note. Ceramic magnets should be considered as an individual case because they do not contain any nickel or iron. This has the effect of decreasing the inductance of the pickup and significantly raising the resonant frequency. It is for this reason that many consider ceramic magnets to have a brittle sound, not their gauss strength. Looking at this from another point of view, ceramic magnets can be said to produce increased clarity, better note definition and faster response to picking.
Output – The overall output of a passive pickup is influenced by several design factors: number of turns of wire on the coil(s), strength of the magnet, coil geometry and magnetic circuit geometry.The output of an active pickup is influenced by the same factors but is predominantly determined by the design of the onboard preamp.

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Magnet: Alnico 5

Product Details

Please use the amp to the right to select which position, tone and mix you'd like to hear sample of.

Description

We took the noiseless Classic Stack and ratcheted everything up another notch. For the Hot Stack Jazz Bass, we increased the output and thickened up the midrange response, which gives rock tones an added push without getting harsh. The slightly overwound bridge model pairs perfectly with the Hot Stack Jazz Bass neck pickup, for a powerful matched set. This is everything you love about the world-famous Jazz Bass tone, but with more oomph.

(Note: The Hot Stack Jazz Bass is based on the slightly wider American-sized Jazz Bass bridge pickup. If you have a Mexican Standard Jazz Bass, you will likely need to use two neck pickups, as the pickup slots are both neck-sized on that model.)

Hand built in Santa Barbara, CA, the noiseless Hot Stack for Jazz Bass uses Alnico 5 rod magnets, Forbon flatwork, 4-conductor lead wire, and is vacuum wax potted for squeal-free operation.

Wiring & Dimensions

Dimensions specs: Hot Stack Jazz Bass Bridge

Dimensions specs: Hot Stack Jazz Bass Neck

For wiring diagrams, click here.

The E.Q. chart gives you a general idea as to the bass, mids and treble of each pickup position

Neck

Bridge

Customer Reviews

★★★★★

Based on 13 reviews

Adam D.

★★★★★

Sound great and completely killed

Sound great and completely killed my hum problem

Published date

01/14/25

Jaime S.

★★★★★

Purchased for a Sire P7

Purchased for a Sire P7 first Gen. Previously I installed a Hot P on this bass and definitely it was in need if a bridge pickup that could go toe to toe with the HotP. Entre the Hot Double Stack. It is amazing the tones at high volume without noise or distortion that this Pickup can handle. Definitely a must for a P/J since the Hot Double Stack J will aid the P Pickup in the Mix

Published date

09/24/24

Chris M.

★★★★★

Huge improvement over the stock

Huge improvement over the stock pickups that were in my jazz bass. Put a full set in - well balance with each other and I love the full tone that the added mid-range brings. Easy install as well.

Published date

03/25/24

Tony L.

★★★★★

Well I ordered the neck

Well I ordered the neck not bridge. I love it! Better than expected and beautiful. Sounds and performs amazing

Published date

02/15/24

Mark R.

★★★★★

Excellent for PJ setup

I have a Shop Floor Custom Shop Hot Stack bridge pickup with no logo in my Jaguar PJ. The build quality is impressive. The STK-J2 has a wide frequency response, and unlike other PJ bridge pickups, this pickup evenly matches the Precision pickups' output. The frequency response is flat and wide with no presence peaks across the spectrum. The Hot Stack - STK-J2 sounds significantly better than the Fralin +5% overwind it replaced. Now, there are plenty of mix options with the Precision pickup. I highly recommend this pickup. Especially for a PJ bass.

Published date

03/28/23

Mark

★★★★★

A Jazz bridge position pickup hot enough to work in a PJ bass.

The Fralin 5% overwind was too weak, but this Hot Stack Jazz bridge pickup evenly matches the Precision pickups' output on my on my Jaguar PJ. Tons of new possibilities. Flat frequency response.

Published date

03/26/23

Colin R.

★★★★★

I really like these pickups

I really like these pickups a lot. I put them in a Seymour Duncan traditional series jazz bass. This bass has an active nordstrand preamp with a passive switch. Nice and fat sounding and with no noise. Sounds great passive or active.

Published date

12/19/22

Rick G.

★★★★★

Prompt shipping & delivery. GREAT

Prompt shipping & delivery. GREAT SOUND!

Published date

09/28/22

Jeff M.

★★★★★

Hot Stack Jazz Noiseless in Yamaha TRBX174 Bass is Perfect.

I took out the noisy single coil jazz pickup in my Yamaha TRBX174 passive bass, but left in the great sounding P bass humbucker. The Hot Stack Jazz Bass noiseless Bridge pickup is a perfect fit, sounds great, and is quiet. No hum. Love it. BUT YOU MUST REVERSE THE GREEN AND BLACK WIRES on this pickup due to phase cancellation with the stock pickup. This is stated on the installation sheet in the package, but is in tiny print. So, Green wire to the pot, then the Black and Bare wires to ground on the back of the pot. STK-J2 Bridge is a great replacement for any 2 pickup PJ bass that is similar to the Yamaha 174. Very happy with this setup, Thanks Duncan.

Published date

09/21/22

Terry H.

★★★★★

Great Improvement to my Squier Affinity PJ bass

Easy drop in, easy to wire up and solder. The stock jazz pickup was buzzing and had some other noise. Complimented the stock P pickup and, made the whole setup sound Great! Couldn't be more satisfied. Great product! Thanks SD.

Published date

11/09/21

39-bassist

★★★★★

Awesome combo...Pickups

I use the STK-J2 Bridge with the SPB-1 and wow what a fantastic setup...I also use the Stk-j2b with the SBP-4 and that sounds great for a totally different tone. (I run both pickups on and full tone. WOW Thank you for fantastic models of pickups!

Published date

03/11/21

Evan W.

★★★★★

Hot Stack for Jazz Bass

Noiseless replacement pickups are absolutely essential for a Jazz Bass. The Hot Stack coils have a little extra "punch" in the low midrange as compared to the stock pickups. Perfectly sized to fit the existing cutouts with no modification.

Published date

01/30/21

Chris J.

★★★★★

Pairs with SPB-1

I got this to pair with an SPB-1, which has a growl that I love. PJ configurations are tricky because the pickups are so weirdly different. The Hot Stack really brings it, and I can confidently recommend this pairing. The level of the two pickups is practically even, and together they make a really great full tone. Separate, they each have their distinctive sounds, and they're both humbucking! So all around it's an awesome dynamic duo for passive PJ enthusiasts like me.

Published date

11/17/20

Showing 3 of 13 reviews

Neck	L H
Bridge	L H
DCR: Neck 18.6, Bridge 25

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