A 4-string Musicman Reflex (also called the “Game Changer”) bass guitar.
A very unique and versatile instrument that lets you route the two humbucking pickups in a variety of ways including parallel, series, and reverse. You can even plug in the bass via USB and program your own settings using the online software.
The bass itself has a natural resonance and pronounced midrange attack to the sound and is built superbly.
These go for close to 2500.00 new depending on the different configurations you can buy.