I have a Lusithand Single NFP Preamp that is wired for use with two pickups. The pots are Volume—Pickup Blend—NFP filter control. AWESOME sounding preamp, just don't have a current use for it. $75 Shipped CONUS.
From Lusithand: "The NFP is a filter preamp alike the ones seen on basses like the Alembic or Wal. Being a low pass filter, it lets all bass frequencies pass through up to 4Khz where it starts cutting. The cutoff point has a resonant peak that can be boosted by pulling-up on the potentiometer. The potentiometer also allows you to sweep the cutoff point(resonant peak) within a range range of 170Hz to 4 khz.
To use with any pickup types. The single version of this Lowpass filter preamp makes it useful for using with single pickup instruments or as a single Filter that affects both pickups simultaneously like a regular preamp. The Filter potentiometers are push-pull to boost the resonant peak.
Operation: 9v or18v Current Draw: 1.8mAh"
From Lusithand: "The NFP is a filter preamp alike the ones seen on basses like the Alembic or Wal. Being a low pass filter, it lets all bass frequencies pass through up to 4Khz where it starts cutting. The cutoff point has a resonant peak that can be boosted by pulling-up on the potentiometer. The potentiometer also allows you to sweep the cutoff point(resonant peak) within a range range of 170Hz to 4 khz.
To use with any pickup types. The single version of this Lowpass filter preamp makes it useful for using with single pickup instruments or as a single Filter that affects both pickups simultaneously like a regular preamp. The Filter potentiometers are push-pull to boost the resonant peak.
Operation: 9v or18v Current Draw: 1.8mAh"
