Detail 01
Underwound bobbins
It has fewer windings than the regular Custombucker, producing more clearly defined overtones and harmonics.

Independent shopping perspective
The Custombucker Underwound is a gold Gibson Custom humbucker with fewer bobbin windings than the regular Custombucker. It retains 42 AWG wire, unbalanced unpotted coils, and an Alnico III magnet, while the reduced winding count is intended to bring out more clearly defined overtones and harmonics. Gibson describes its rhythm-position voice as brighter, and identifies it as a pairing option with a standard Custombucker in the treble position. The pickup uses two-conductor wiring and has a 7.2k average DC resistance.

Strong match
What matters in use
Catalog numbers tell only part of the story. These are the details most likely to change how this product feels, sounds, or fits into a setup.
Detail 01
It has fewer windings than the regular Custombucker, producing more clearly defined overtones and harmonics.
Detail 02
Uses the same wire, coil imbalance, and unpotted construction described for the regular Custombucker.
Detail 03
The pickup uses an Alnico III magnet.
Detail 04
It is supplied with two-conductor wiring.
Detail 05
Its listed average DC resistance is 7.2k.
Final check
Product questions
Straight answers to the questions shoppers most often ask about this product.
It has fewer bobbin windings, which produces more clearly defined overtones and harmonics.
The position is listed as any, though its brighter voice is specifically described in the rhythm position.
It uses two-conductor wiring.
Reference
The complete catalog record, organized around the decisions musicians make when comparing gear.