SF series 'SolidFlex' Transducer SF pickup series is newly designed to accomplish both advantages, the flexibility of cable & film type pickup, and the power of solid type piezo. Also this pickup uses gold plated contact board and solid piezo like PG Series, and special design of flexibility is applied to SF series. It reduces buzzing sound caused by curved bottom of saddle or rough surface of pickup cavity on the bridge of guitar. This new design can make stable and clear sound.SF Series has the same output and impedance as PP and PG series, so they fit all Artec EQ products. SF pickup series is also applying the same cable and metal pipe jack as PG pickup series.