- headless configuration Steinberger-shaped narrow hard maple body, set three-piece hard rock maple with CybroSonic patented graphite U-channel, 24-fret Phenolic fingerboard with dot inlays, no traditional headstock, patented DoubleBall bridge with tuners, one EMG-40P and one piezo bridge pickups, four external knobs (MV, pickup blend, hi cut/boost, lo cut/boost), two internal knobs (EMG pickup level, piezo level), black hardware, available in Alpine White or Pitch Black finish, 34 in. scale, gig bag included, current mfg.

- similar to the Synapse Bass XS-1FPA, except has a flame maple top, available in Trans. Amber, Trans. Blue, Trans. Green, or Trans. Red finish, current mfg.

- similar to the Synapse Bass XS-1FPA, except in five-string configuration and optional fretless fingerboard (Pitch Black finish only), available in Alpine White or Pitch Black finish, current mfg.

- similar to the Synapse Bass XS-15FPA Five-String, except has a flame maple top and optional fretless fingerboard (Trans. Red finish), available in Trans. Amber, Trans. Blue, Trans. Green, or Trans. Red finish, current mfg.