Description
The ASB-5B is Seymour Duncan’s answer for bassists who want active output without losing the character that makes passive pickups feel alive. Sized to fit the Phase I soapbar footprint, it slots in as a direct replacement for a traditional Bartolini P2, so retrofits are straightforward for anyone upgrading a 5-string bridge position.
Inside, an internal active preamp pushes more volume and presence than you’d expect from a passive design, while Duncan’s split-blade construction keeps every string balanced against its neighbors — a detail that matters even more once you get down to a low B. The voicing sits in a natural middle ground: even response across bass, mid, and treble, with just enough tonal shaping to feel intentional without tipping into hype or scoop. That balance makes it equally comfortable under fingerstyle playing and slap technique.
- Active Phase I soapbar pickup for 5-string bass, bridge position
- Internal active preamp for added volume and presence over passive designs
- Split-blade design for consistent string-to-string balance
- Direct replacement for Bartolini P2
- Pairs well with Duncan’s STC-2 or STC-3 Tone Circuit preamps for further EQ shaping
- Approximately 1,000 hours of continuous battery life per set
- Includes mounting and wiring hardware
If you’re chasing a soapbar that stays honest to your playing dynamics while giving you the headroom active electronics provide, this is built for exactly that job.





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