The Pure Resonator SB is designed especially for spider bridge resonator guitars. The pickup is designed to be installed inside the resonator cone on the center screw.
The Pure Resonator BB is designed especially for biscuit bridge resonator guitars. It features a screw-mounted pickup for best possible sound transmission with maximum feedback resistance. The pickup is pre-wired for external jack mount with a Dual-Lock (by 3M) fastening system. The jack can also be installed internally if the Dual-Lock is removed (approved professional installation required). The Pure Resonator BB was updated in December 2017 to further optimize string-to-string balance.