Seymour Duncan AJB-3ASB Steve Bailey Fundamental Fretless System 3-Band Tone Circuit

The Seymour Duncan AJB-3ASB Steve Bailey Fundamental Fretless System is a complete active pickup and EQ solution engineered specifically for fretless bass. Designed in collaboration with legendary fretless virtuoso Steve Bailey, this system delivers the articulate, responsive tone that fretless playing demands, with extensive onboard control to shape your sound across the frequency spectrum.

This system combines calibrated neck and bridge active J Bass pickups with a 3-band EQ circuit that includes separate bass and treble controls, a dedicated midrange control, master volume, and blend control. The frequency contour switch—engaged by pulling up on the volume knob—provides an additional layer of sonic customization, while two onboard trim pots allow you to preset the contour EQ to your specifications. Power is supplied by a standard 9-volt battery (accommodates 18 volts for enhanced headroom), delivering approximately 1,000 continuous hours of operation per battery set.

The system is sized to accommodate both 4 and 5-string basses and includes all necessary mounting hardware plus a detailed wiring schematic for straightforward installation. Each unit is hand-built in Santa Barbara, California, ensuring the attention to detail and quality control expected from Seymour Duncan's boutique manufacturing standard.

• Active pickup and 3-band EQ system voiced specifically for fretless bass
• Calibrated neck and bridge active J Bass pickups
• 3-band Tone Circuit with bass, treble, and midrange controls
• Master volume and blend control
• Frequency contour switch engaged via volume knob pull-up
• Two trim pots on circuit board for preset frequency contour EQ
• Designed for 9-volt power; accommodates 18-volt power for enhanced headroom
• Approximately 1,000 continuous hours battery life per set
• Compatible with 4 and 5-string bass configurations
• All mounting hardware and wiring schematic included
• Hand-built in Santa Barbara, California

This pickup system represents decades of fretless expertise distilled into a complete, cohesive electronics package—ideal for players seeking precision, responsiveness, and tonal flexibility.