Gibson Original ABR-1 Kalamazoo Complete - chrome powered-subwoofer This 12-56 Light Top/Medium Bottom

This 12-56 Light Top/Medium Bottom Bluegrass set has powerful low-end

or mute the signal altogether

30 dB quieting sensitivity: 28 dB

Keeley is  well-known for high-end tone and durability

or reconfigured as a mute switch for silent tuning on stage

Gibson Original ABR-1 Kalamazoo Complete - chrome powered-subwoofer This 12-56 Light Top/Medium BottomThe original, not a look alike. This is the genuine bridge, from the manufacturer who makes the originals. Manufactured since the 1950s, this Tune o matic bridge is 100% true to the original. The brass saddles are supplied without notches, for custom string spacing in your shop. The adjustable intonation screws are held by a retainer wire. Knurled height adjustment thumbwheels and threaded mounting posts are included. String spread 2 1 32" (51. 56mm)