How to Set Up a PRS Guitar: Bridge and Truss Rod

Why Set Up Your PRS

PRS guitars are known for their craftsmanship and consistency, but even the best factory setup may not match your playing style. The action may feel too high, the vibrato may not return to pitch, or the pickups may sit at a height that colors the tone more than you want.

Adjusting three key areas solves most problems: the truss rod, the vibrato bridge, and the pickup height. These adjustments work together to give you a low, buzz-free action with a tone that suits your ears. In this guide, you'll learn how to make these adjustments safely and effectively.

Prepare Your Tools and Workspace

Before you make any adjustments, gather the tools you'll need. Typically, you'll need a hex wrench set (metric and imperial), a Phillips screwdriver, a small ruler or feeler gauge, and a reliable tuner. You might also use a capo to check neck relief.

Work on a clean, flat surface with good lighting. Since wood is sensitive to humidity and temperature, as described in Martin's wood guide, try to set up your guitar in a stable environment. Allow the guitar to acclimate to the room for at least an hour before starting.

Always detune the strings slightly before turning any truss rod or bridge screws, and then retune after each step. Keeping the guitar in tune during the process is essential for accurate adjustments.

• Hex wrench set (common sizes: 4mm, 5mm, 3/16 inch)
• Phillips screwdriver
• Capo or small straightedge
• Tuner (clip-on or pedal)
• Soft cloth for cleaning

Adjust the Truss Rod for Neck Relief

The truss rod controls the forward bow (relief) of the neck, which directly affects string height and buzzing. A tiny bit of forward bow is normal and desirable, as it allows the strings to vibrate freely without hitting the frets.

To check the relief, press the low E string down at the first fret and at the fret where the neck meets the body (usually the 14th or 15th fret on PRS models). Look at the gap between the bottom of the string and the top of the 7th or 8th fret. This gap should be very small, roughly the thickness of a thin pick. If there's too much gap, the neck has too much bow; if the string lies flat on the frets, the neck is too straight or back-bowed.

To adjust, use the appropriate hex wrench on the truss rod nut, usually at the headstock end of the neck. Turn the nut clockwise to reduce relief (straighten the neck) and counterclockwise to increase relief. Turn only a quarter to half a turn at a time, then retune and recheck. As Martin's wood guide notes, wood is a living material, so wait a few minutes for the neck to settle after each adjustment.

For more detail on truss rod mechanics, see our truss rod adjustment guide.

Set Up the Vibrato Bridge

PRS guitars typically use a vintage-style two-point vibrato bridge, sometimes called a tremolo. Each saddle has a screw to adjust its height individually. The goal is to get the string height (action) low enough for comfortable playing without buzzing on the frets.

Start by adjusting the saddle height screws on the low E and high E strings. Use a hex wrench to lower or raise each saddle until the distance from the top of the 12th fret to the bottom of the string is about 1.5 millimeters (0.06 inches) on the high E and about 2 millimeters (0.08 inches) on the low E. These are common starting points, but your preference may differ. Always make small adjustments and play the strings to check for buzzing.

The vibrato arm itself should be set so that it moves freely but stays where you put it. If the bridge does not return to pitch after using the arm, you may need to adjust the spring tension in the back cavity. Springs that are too loose can cause the bridge to float too high, increasing string height; too tight and the bridge will not move. The bridge types explained article covers the differences between fixed and vibrato bridges.

String tension and material also affect how the bridge behaves. As explained in Martin's acoustic guitar string guide, different strings have different tensions and feel, so if you switch gauge, you may need to revisit the bridge setup.

Adjust Pickup Height

Pickup height affects output level and tone. If the pickups are too close to the strings, the magnetic pull can interfere with string vibration, causing a choked or out-of-tune sound, especially when you bend. Too far away, and the output becomes weak and thin.

The standard approach is to set each pickup so that the distance from the top of the pole pieces (or the pickup cover) to the strings is about 2.5 millimeters (0.1 inches) on the bass side and 2 millimeters (0.08 inches) on the treble side when the string is pressed at the last fret. These are guides, not rules. Play your guitar and listen for balance between strings and between pickups.

Use the screws on the sides of the pickup casing to raise or lower the pickup. Typically, lowering the neck pickup or raising the bridge pickups can balance output. The pickup height adjustment guide has more in-depth information.

For an understanding of how electronic components shape tone, the Martin electronics guide discusses tone controls and pickup behavior, though it focuses on acoustic-electric guitars. The principles of output and EQ still apply to electric guitars like PRS.

Check Intonation

After setting the neck relief and bridge height, check the intonation. Play the open string and then the 12th fret harmonic (or the 12th fret note) and compare them with a tuner. If the fretted note is sharp or flat, the saddle needs to move forward or backward.

To adjust, loosen the string, slide the saddle along the bridge plate or turn an intonation screw, and then retune. Repeat for each string. This step is critical for ensuring chords sound in tune across the neck.

See guitar intonation for a complete walkthrough, including which direction to move the saddle.

Final Checks and Maintenance

Once you've made all adjustments, play through the entire neck, from open strings to the last fret, and listen for any unwanted buzz. Check that all screws are snug but not over-tightened. Wipe down the strings and fretboard with a clean cloth to remove any oils from your hands.

If you experience any string buzzing, revisit the relief and bridge height. Sometimes the nut slots are the culprit; if you suspect that, see our nut slot adjustment guide.

Finally, protect your hearing. Playing a loud electric guitar through an amp can easily exceed 85 decibels, and prolonged exposure can cause permanent hearing loss, as explained by the National Institute on Deafness and Other Communication Disorders. Always use ear protection when you practice at loud volumes.

A well-set-up PRS guitar can be a pleasure to play for years. If you're in the market for a new PRS or want to compare models, check out our best PRS guitars guide for solid recommendations.

What to pick for your use

Questions

How often should I adjust my PRS guitar?

Check the setup every few months, especially if you change string gauge or live in a climate with big humidity swings. Wood and metal settle over time, so periodic tweaks are normal.

Can I adjust the truss rod myself?

Yes, but make small turns (no more than a quarter to half turn) and retune after each adjustment. If you feel resistance, stop and consult a professional to avoid stripping the nut.

What is the best action for a PRS guitar?

There is no universal answer. A low action (around 1.5mm on the high E and 2mm on the low E at the 12th fret) is common, but it depends on your playing style. Heavier picking and bending may require slightly higher action to avoid buzz.

Do I need special tools for a PRS setup?

A set of hex wrenches and a small Phillips screwdriver are usually enough. Most PRS models use standard-size wrenches, but check the manual that came with your guitar.

Why does my PRS bridge not return to pitch after using the vibrato arm?

This is usually a spring tension issue. Adjust the screws on the tremolo claw in the back cavity to increase or decrease spring tension. The goal is to make the bridge level with the body surface when at rest.