The Washburn RR150 (Red Rocker 150) was made between 1997 and 1999. This acoustic electric guitar was endorsed by Sammy Hagar. Although at first glance it looks like a single cutaway solid-body electric with two humbuckers it has an acoustic bridge with Fishman piezo system. The hollow body and dual output jacks (one for the humbuckers and one for the piezos) mean you can quickly switch between electric and acoustic sounds, and even blend the two as there are separate volume controls for the humbuckers and Fishman system.