Seymour Duncan SH-4 JB Rail 7-String Matte Black Pickup

The SH-4 JB Rail is a high-output humbucker engineered specifically for extended-range 7-string instruments, delivering aggressive articulation and sustained midrange punch without sacrificing clarity across the wider string spacing. The rail design ensures consistent magnetic response This digging into the lowest B string or trading leads on the high E, making it a reliable choice for modern metal and hard rock players who demand responsiveness from their entire tonal palette.

Tone & Output Character

Built around an Alnico 8 bar magnet, this pickup produces a thick, focused output with pronounced high-end bite and a compressed midrange that cuts through dense mixes. The rail design evenly distributes the magnetic field across all seven strings, eliminating the dead spots common to standard coil configurations and ensuring tight, punchy response on extended-range instruments.

Build & Wiring Flexibility

Hand built in Santa Barbara, California and vacuum wax potted for stability and feedback rejection, this pickup supports series, parallel, and split-coil applications, giving you tonal options beyond standard single-coil-split setups. Pairing it with a 500K potentiometer preserves high-end presence, while a 250K pot yields a mellower character—both approaches work equally well depending on your amp and cabinet.

Key Features

• Alnico 8 bar magnet for high output and focused tone
• Rail design for even magnetic field distribution across seven strings
• 4-conductor lead wire for wiring flexibility
• Series, parallel, and split-coil wiring options
• Vacuum wax potted construction for superior stability and feedback rejection
• Hand built in Santa Barbara, California
• Dimensions: 4.1″ × 2.8″ × 1.5″
• Compatible with 500K or 250K potentiometers
• Matte black finish
• Optimized for 7-string extended-range instruments

The SH-4 JB Rail delivers the aggressive presence and extended-range consistency that modern heavy music demands, backed by meticulous Santa Barbara craftsmanship.