Detail 01
Frequency contour
Pulling up the volume knob activates a contour that emphasizes harmonics and midrange; two trim pots adjust the contour EQ.

Independent shopping perspective
A Steve Bailey-developed active soapbar and 2-band preamp system tailored to 6-string fretless basses, with contour control for enhanced harmonics and midrange clarity.


Strong match
Consider the trade-offs
What matters in use
Catalog numbers tell only part of the story. These are the details most likely to change how this product feels, sounds, or fits into a setup.

Detail 01
Pulling up the volume knob activates a contour that emphasizes harmonics and midrange; two trim pots adjust the contour EQ.
Detail 02
A single 9V powers the system for approximately 1,000 continuous hours; two 9V batteries in series provide added headroom.
Detail 03
The set includes a pre-wired harness, potentiometers, mounting hardware, and black anodized dome-style knobs.
Final check

Product questions
Straight answers to the questions shoppers most often ask about this product.
It is designed for 6-string fretless basses with Phase I/P4-sized soapbar routes measuring 4.66 x 1.27 in and space for three control knobs.
The custom-voiced 2-band preamp provides bass and treble EQ, plus a pull-up volume control that activates the frequency contour.
Yes. It can use two 9V batteries wired in series for added headroom.
Mounting hardware, a pre-wired harness, high-quality potentiometers, and black anodized dome-style knobs are included.
Reference
The complete catalog record, organized around the decisions musicians make when comparing gear.