Seymour Duncan ASB-3ASB Steve Bailey 6-String Fretless System 3-Band Tone Circuit

The ASB-3ASB is a complete active pickup and tone circuit system engineered specifically for the 6-string fretless bass, delivering the articulate, punchy response that defined Steve Bailey's signature sound. This hand-built system combines responsive soapbar pickups with a sophisticated 3-band active EQ to sculpt everything from deep lows to singing highs with surgical precision. Built in Santa Barbara, CA, this is serious electronics for players who demand control and clarity from their fretless instrument.

The 3-band Tone Circuit provides master volume, blend control, mid-range adjustment, and concentric bass and treble controls—all wired to high-quality potentiometers on a pre-assembled harness. A special frequency contour switch engages by pulling up the volume control, giving you instant access to frequency shaping without adding extra knobs to your control cavity. Powered by a single 9V battery with approximately 1,000 continuous hours of runtime per set, the system can also run two batteries in series for added headroom.

Designed to retrofit into any fretless bass with space for four control knobs and a single 9V battery cavity, this system includes all necessary mounting hardware and a battery clip for hassle-free installation. The included black anodized, knurled, dome-style knobs provide secure, tactile control and a professional appearance once mounted.

• Active soapbar pickup set with neck and bridge pickups for 6-string fretless bass
• 3-band active EQ with bass, treble, mid-range, and master volume controls
• Blend control for smooth pickup mixing
• Special frequency contour switch engaged by pulling up the volume control
• Phase I soapbar cover design
• Pre-wired harness with high-quality potentiometers
• Single 9V battery with approximately 1,000 continuous hours of runtime
• Compatible with dual 9V batteries wired in series for increased headroom
• Includes battery clip and black anodized knurled dome-style knobs
• All necessary mounting hardware included
• Hand built in Santa Barbara, CA
• Fits any fretless bass with four control knobs and standard control cavity

The ASB-3ASB delivers professional-grade active electronics and Swiss-watch precision control, making it an ideal upgrade for fretless players seeking the clarity and responsiveness that defined a generation of bass tone.