Portable bridge-mounted piezo, tailpiece-mounted output jack for double bass DB-1 faithfully reproduces the breadth of tone and dynamic range of your instrument without modification. A piezo sensor installs in the eye slot of the bridge, held in place via friction and the 1/4" jack housing secures non-destructively to the tailpiece. Features: Safe install A wood-encased piezo sensor installs in the eye slot of the bridge, held in place via friction. Neatly finished shim discs ensure the perfect fit. The 1/4" jack housing secures non-destructively to the tailpiece with a screw assembly at the string eye. Wooden sensor The piezo sensor has a lightweight wooden casing to achieve maximum tonal sensitivity and transmission. Natural sound DB-1 has a passive design that reproduces the natural sound of the instrument with no need for a battery. Complete installation set The pickup comes with additional neatly-finished shim discs for fitting the sensor in narrow bridges. DOWNLOAD INSTALLATION INSTRUCTIONS HERE Specifications Wood White beech Maximum Impedance 800 Ω Measurements Specified part Letter Size in MM (from*) Size in MM (to*) Size in INCH (from*) Size in INCH (to*) Pickup sensor side diameter a 21,0 21,1 0,827 0,831 Pickup sensor with extention diameter b 26,2 26,3 1,031 1,035 Pickup sensor side diameter c 21,0 21,1 0,827 0,831 Lead wire length d 260,0 - 10,236 - Pickup sensor thickness e 2,6 2,7 0,102 0,106 Jack housing length f 61,0 62,0 2,402 2,441 Mounting screw length g Mounting screw width h Shim diameter i 20,0 - 0,787 - Thin shim thickness j 0,6 - 0,022 - Thick shim thickness k 1,0 - 0,039 - *Our handmade pickups may vary slightly in size due to the nature of the building