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Bare Knuckle Abraxas vs Seymour Duncan JB Model (SH-4)

high confidence

Compared with the Bare Knuckle Abraxas, the Seymour Duncan JB Model (SH-4) has an Alnico V magnet (punchier, more aggressive) and a brighter top end.

Specs side by side

differs marks specs where they part ways
SpecBare Knuckle AbraxasSeymour Duncan JB Model (SH-4)
DC resistancediffers14k16.4k
Inductancediffers8.18 H (measured, 1 reading)8.54 H (measured, 3 readings)
MagnetdiffersAlnico 4Alnico 5
CoilHum-cancellingHum-cancelling
Resonant peakdiffers5.5 kHz (Seymour Duncan's own test load)
Bass (tone chart)Each maker grades its own chart, so read these within a brand5 / 105 / 10
Mids (tone chart)Each maker grades its own chart, so read these within a brand6 / 106 / 10
Treble (tone chart)differsEach maker grades its own chart, so read these within a brand6 / 108 / 10
Slotbridge humbuckerbridge humbucker
Traitshigh output, darkhigh output

How close on each spec

100 means identical on that spec. The score weighs these, and counts anything we couldn't compare as a typical difference. How scoring works

Output
94
measured inductance
Magnet
85
Alnico 4 vs Alnico 5
Coil
100
same coil type
Brightness
32
each against its maker's average
Mids
84
each against its maker's average
Bass
94
each against its maker's average

Videos

Bare Knuckle Abraxas

Seymour Duncan JB Model (SH-4)

Seymour Duncan JB SH-4/TB-4 Bridge Humbucker Pickup Demo Clean, Dirty and Lead Tones (NO TALKING)
John-Ace Llera
DiMarzio SUPER DISTORTION vs Seymour Duncan JB SH-4 - Passive Bridge Guitar Pickup Comparison Demo
Mike Stamper · comparison

What players and reviewers say

On the Bare Knuckle Abraxas

The Abraxas isn’t some mid-scooped, high-gain mudfest.
Darth Phineas · Jun 18, 2025Darth Phineas (opens in a new tab)
Everything on the Bare Knuckle Abraxas

On the Seymour Duncan JB Model (SH-4)

The Full Shred is a tad lower in output and gets close to the lead sound of a JB.
El SupremoSeymour Duncan forum (opens in a new tab)
JB is very touchy. It likes the heights about the same on the high and low side.
glip22 · Apr 8, 2016Rig-Talk (opens in a new tab)
Everything on the Seymour Duncan JB Model (SH-4)

Full reviews