How To Set Up A Martin Guitar

Acoustic Guitar Set Up'due south

Adjusting Action For Playability & Tone

Action is a term used to describe the style an musical instrument is adjusted and how well it plays. Action is virtually commonly thought of as how high the strings are from the frets.

A good gear up up can:

Increment comfort by decreasing pressure on the players finger tips
Eliminate or subtract buzzing
Amend sustain and tone
Better intonation

Depending the abilities of the instrument and the needs of the player adjustments can be made to improve the instruments action and increment the comfort of playing. I like to have my customers play for me, even if they're just beginning. The opportunity to communicate and watch someone's playing mode is essential to getting it correct. The feel that's right for yous is every bit unique as the musical instrument you play.

Setting Upwards An Musical instrument

Common Measurement Conversions
three/32" = .093 = 2.3mm = .23cm
1/8" = .125 = 3.18mm = .32cm

Allow's start with a few measurements...

Cord Height At 12th Fret

Saddle acme directly affects how high the strings sit higher up the frets. Saddle radius/contour likewise affects the instruments action as the curvature of the saddle changes the strings elevation.

Not all instruments play the same with the identical set-up and a actor's selection attack and manner will certainly contribute to how an instrument is set up up. I mention this considering it can be the divergence between a professional set up, and 1 "done by the numbers".

What is the most mutual cord height? Most factories gear up action at iii/32" to 7/64" on the bass E string at the 12th fret and two/32" to 5/64" on the treble Eastward.

ruler placed on top of fret
Mensurate Distance Betwixt
Pinnacle of 12th Fret and Bottom of String

Place a ruler on top of the twelfth fret and measure out the distance between the elevation of the fret and the bottom of the outer Eastward strings.

High activity on an acoustic guitar not simply affects the intonation, information technology tin brand the instrument hard, if not painful, to play.

String Height At The Nut

String height at the nut should be as low equally possible without causing open up string buzz. The distance between the cord and the 1st fret would almost e'er be below ivory guitar nut .020 (.v mm). When I am certain of the condition of the frets I set action at the nut every bit low as possible. String height at the nut can also be affected by the condition of the frets, cord estimate and choice attack.

To check cord height at the nut, fret each string on the 3rd fret and cheque the gap between the string and the 1st fret. While some instruments may still play clean if the string is touching the first fret, most will require a gap of a few thousands to avoid buzzing.

Proper Nut Specs

Outer cord positioning to prevent fret edge whorl off
Equal cord to cord spacing
Bottom slot angle provides sustain and clarity
Slots width keeps strings from binding
Depth to provide lowest action and best intonation.

Correct Neck Relief

Appropriate relief (bow) in the cervix gives the strings amble room to vibrate without hitting the frets. Too much relief and a neck feels "mushy" towards the center. Read more about this adjustment on the truss rod folio.

Intonation

An instrument that is not intonated properly will non play in melody when moving up and downwardly the fingerboard. Fifty-fifty later on tuning the guitar, players will notice certain notes are precipitous or flat. Correcting intonation issues obviously makes a big divergence in the manner an instrument sounds.

Level and Well Crowned Frets

Frets need to be perfectly level and accept a nicely formed crown. Frets of inconsistent height can cause buzzing, besides know equally fretting out.

Worn or flattened fret crowns tin bear upon intonation and cause buzzing.

Things That Can Raise or Lower String Meridian

Humidity / Dryness

Moisture causes the wood of an instrument to groovy, loss of moisture will cause them to shrink. Almost will find that during the summertime or times of high humidity the top may keen and lift the strings higher off of the fingerboard making it more difficult to play.

On the other hand, instruments that have been left without proper humidity volition often become dry, which can cause the top to drop and create buzzing issues. You lot may as well see sharp fret ends that are at present exposed due to the shrinking of the fingerboard. During times of low humidity it is essential that you go along your instrument properly humidified. Read more about humidity.

Article of clothing and Grooves

The grooves of the nut and/or bridge saddle will wear as the strings pass over them. As the strings pull to and fro across the nut and saddle they are slowly but surely deepening the groove. Excessive wearable in the nut slots may cause the strings to buzz when played open up since they are now too close to the frets. Grooves in the saddle can impact intonation and crusade strings to suspension

Tension and Acme Bellying

It is particularly common for the activity on apartment peak instruments to raise over time due to the tension placed on the top. The strings continual pull on the bridge and top can create a slight arching which raises the action over fourth dimension. While a slight arch is quite normal, greater changes in the tops shape may be and indication of structural problems such as loose braces or a warped or croaky span plate.

Changing String Gauge

If you alter the gauge of strings you are using, be information technology heavier or lighter, at that place will be a change in tension on the top and neck of the instrument. When setting upwardly an instrument y'all must choose what approximate of cord y'all volition be using so that the action can be adjusted accordingly. Changing the string gauge volition effect your set up up.

Structural Problems

Loose braces, loose bridges, loose necks, cracks and other structural issues may first become apparent when a player notices a significant alter in an instruments action.