This beautiful bass was just traded in by a local client who barely used it.  This Grainger is just waiting to be loved!  She's in excellent condition and ships with PRS case candy and its OHSC.  Save some $$ on this one. 

From PRS - 

Endless Features For Studio And Stage

“These basses give me everything I need for recording and playing live...all the tone, clarity, power, and feel...everything. They are works of art and great tools for working bassists,” - Gary Grainger

The Grainger 4 is the evolution of our Private Stock Gary Grainger Bass line. As the primary designer of our Private Stock basses, Gary (John Scofield, Dennis Chambers, Frank Gambali, etc.) collaborated with many bass artists, including Wyzard (Mother’s Finest) and Kevin Walker (Justin Timberlake), to create a Core PRS bass with all the character and quality of Gary’s Private Stock models but with a more universal appeal.

SWITCHING

Knobs 1-2 are volume controls and passive/active switch:

Knob 1: Neck pickup volume.
Down = Active, Up = Passive If this knob is up and Knob 2 is down only the neck pickup (passive) is heard

Knob 2: Bridge pickup volume.
Down = Active, Up = Passive
If this knob is up and Knob 1 is down only the bridge pickup (passive) is heard.
If both knob 1 and knob 2 are in the up position, both pickups (passive) are heard.

Knobs 3-5 are a 3-band EQ control:

Knob 3: Bass EQ. Functions with pickups in active mode.
Knob 4: Mid EQ. Functions with pickups in active mode.
Knob 5: Treble EQ. Functions with pickups in active mode.

The bass will function passively without batteries as well.