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Seymour Duncan SRB-1B Rickenbacker Bridge Pickup

The SRB-1B is a purpose-built bridge pickup engineered specifically for 4-string Rickenbacker 4003 basses, delivering the classic jangly, articulate tone that defines the instrument while offering modern tonal flexibility. This humbucking design replaces the stock horseshoe magnet configuration with dual blade magnets and four-conductor wiring, unlocking coil-split options that expand your sonic palette without sacrificing the fundamental character of a Rick.

Tone & Output

Dual Alnico V blade magnets and an 8.3k DC resistance generate a punchy, defined low-midrange response with 8 kHz resonant peak that emphasizes clarity and articulation—essential for cut through a mix. The EQ profile of 6 (Bass) / 4 (Mid) / 7 (Treble) provides balanced low-end presence without muddiness, controlled midrange, and bright treble that captures the signature Rickenbacker shimmer and snap.

Construction & Compatibility

Built with vacuum wax potting for stability and noise rejection, this pickup ships with a phenolic mounting ring because the SRB-1B is slightly larger than the original bridge unit—the included ring is essential for proper fitment, and the original chrome ring is incompatible. The four-conductor cable enables in-phase and out-of-phase coil splits as well as series/parallel switching, giving you precise control over humbucking effect and tonal character.

Key Features

• Dual Alnico V blade magnets
• 8.3k DC Resistance (Bridge)
• 8 kHz Resonant Peak
• Four-conductor cable for coil-split flexibility
• Humbucking dual-coil configuration
• Vacuum wax potted construction
• Phenolic pickup ring included
• EQ: 6 Bass / 4 Mid / 7 Treble
• Designed for 4-string Rickenbacker 4003 bass
• Direct replacement for stock horseshoe magnet bridge pickup

The SRB-1B preserves the tonal DNA of the Rickenbacker while adding modern wiring versatility and improved consistency, making it an ideal upgrade for players seeking refined articulation and expanded tonal control.