Active Pickup for mandolin. This revolutionary pickup combines four active Nanomag pickups, one for each pair of strings, into a single package. The SH 928 features gain pots for each pickup allowing you to adjust the volume of each pair of strings for perfectly balanced output. The preamp’s electronics are all hidden elegantly underneath the integrated pickguard, which also features volume, bass, and treble controls. The SH 928 is suitable for all mandolins that are built in the the tear drop shape (A-type).