PRS Electric Bass Bridge

If you are unfamiliar with making these adjustments, we recommend that the guitar be taken to a qualified repair center.

Most PRS electric basses feature a vintage inspired plate style bridge with modern updates. The saddles are adjustable for string height and intonation and are prevented from sideways movement by grooves in the base plate which capture the saddle height screws. The intonation can be adjusted by moving the four phillips head screws facing the tail end of the bass guitar. We recommend using a tuner, such as the PRS USB-rechargeable clip-on tuner.

Match the octave (fretted) note of all four/five strings with their corresponding 12th fret harmonic and open string by shortening or lengthening the strings with the adjusting screws. 
Adjusting Your Intonation | Tips From The Tech Center | PRS Guitars - YouTube

The Clip-On Tuner | PRS Guitars - YouTube

When setting the action at the 12th fret the string height should be 2.2/32" (1.8mm) on the treble side to 2.6/32" (2.0mm) on the bass side measuring from the top of the fret to the bottom of the string. For a five string (low B) 2.7/32" (2.2mm).

If you are unfamiliar with making these adjustments, we recommend that the guitar be taken to a qualified repair center.