Guild® F412

GUILD 3802506 Details ^top

F412 with D-TAR™ Pickup System
3802506

The quality and ubiquity of our jumbo 12-strings have earned Guild a permanent place in guitar history. As historians Tom and Mary Anne Evans once wrote, “The basic virtue of Guild 12-strings is that they are very loud and [have] a clarity and definition of sound not normally associated with 12-string guitars.”

One of the keys to achieving that clarity and definition is solid construction. While the body size and scale length are the same as our 6-string jumbos, our 12-strings are 1-13/16” wide at the nut, and feature a double truss rod system and our time-tested jumbo bracing pattern.

Designed in the late 1960s as Guild’s first jumbo 12-strings, the F-412 and its sibling, the F-512, are two of our most enduring and popular guitars. The F-412 has an arched curly maple back and solid curly maple sides. Painstakingly true to its vintage roots, this new version of the F-412 has the same body dimensions as the original (17” wide, 21” long, 4.8” deep). It features a solid AAA sitka spruce top, high-quality ebony fingerboard with abalone and mother of pearl block inlays, “G”-shield headstock inlay and gold Grover Rotomatic® tuning machines. Available in Blonde (801) and Antique Burst (837) and Iced Tea Burst (850).

Model Name F412 with D-TAR™ Pickup System
Model Number 380-2506-(Color #)
Category Vintage Jumbo 12-String Guitars
Body Style 12-String Jumbo
Top Solid AAA Spruce
Bracing Hand Shaved
Back Select Arched Laminated Figured Maple
Sides Solid Figured Maple
Bridge Rosewood
Neck 3-Piece Mahogany/Maple/Mahogany
Fretboard Ebony (12" Radius)
Width at Nut 1-13/16"
No. of Frets 20
Scale Length 25 5/8"
Hardware Gold
Machine Heads Gold-Plated Grover® Rotomatic™ Die-cast Mini-Tuners
Pickups D-TAR™ Wave-Length™ Pickup and Preamp System with Load 'N Lock™ Battery Access.
The Wave-Length combines a thin, piezo under-saddle transducer with an 18v, low-noise, high input impedance preamp, to create a system with twice the dynamic range of typical 9v systems. The 18v preamp is powered by two AA batteries and a voltage converter. With 18 volts, the signal has more headroom, so hard strumming wont distort as easily. The preamp also has an input for a second source, like a magnetic pickup or a soundboard transducer.

Two adjustable trim pots, one for low frequency shelving and one for high frequency shelving, allow you to fine tune and set and forget the bass and treble frequencies to optimize the Wave-Length for your instruments size and shape; enabling you transparently amplify the natural timbre of your acoustic guitar with minimal coloration. The soundhole mounted Volume and Tone controls give the ultimate in final control your tonal palette.

But perhaps the coolest part of the system is D-TARs new Load N Lock system, which allows quick and easy AA batteries changes. Just unscrew the endpin collar, remove the old batteries, and pop in the new ones. A quarter turn of the collar is all you need to lock them in place. Controls Volume and Tone Controls Surface Mounted Inside the Soundhole, Two Adjustable Trim Pots in the Preamp, One Low Frequency Shelving and One High Frequency Shelving

Pickup Switching N/A
Finish High Gloss (Nitro-cellulose Lacquer)
Colors
(801) Blonde,
(837) Antique Burst,
(850) Ice Tea Burst
Unique Features Natural Mother-of-Pearl and Abalone Block Position Inlays,
Multiple Bindings,
Tortiose Shell Pickguard,
Dual Truss Rods
Case Includes C5217 Deluxe Hardshell Case, p/n 3501075213
Strings Replace with Guild L1250 Phosphor Bronze 12-String, p/n 3501250000,
Gauges .010 to .049
Introduced 11/2006
Notice Product Prices, Features, Specifications and Availability Are Subject To Change Without Notice

NEW Wave-Length™ pickup and pre-amp from D-TAR®, with the exclusive Load ‘N Lock™ battery access. Wave-Length™ is D-TAR’s NEW under-saddle pickup system that combines a thin, piezo transducer with an 18-volt, low-noise, high-input impedance preamp.

Eighteen volts translates to twice the headroom and dynamic range of a typical 9-volt system. This means you can strum extra hard without experiencing dreaded piezo “quack.” Simply put, the Wave-Length™ is the most non-invasive acoustic guitar pickup and preamp system ever, and is as sonically spectacular as it is visually discreet. The D-TAR® Load ‘N Lock™ system is available on Guild® Contemporary and Traditional Series instruments.

The D-TAR’s NEW Load ‘N Lock™ system allows quick and easy “AA” battery changes. Just unscrew the endpin “collar,” remove the old batteries, and pop in the NEW ones. A quarter turn of the collar is all you need to lock them in place.

To derive its 18 volts, Wave-Length™ merely requires two standard “AA” batteries. The secret is a proprietary voltage power booster.

The D-TAR® Wave-Length™ pickup’s volume and tone controls are nestled in the soundhole for easy access.

GUILD 3802506 Documentation ^top

Guild® Guitars Owner's Manual pdf
Guild® Guitars Limited Lifetime Warranty pdf

GUILD 3802506 Set_Up ^top

Setup: Guild®Acoustic Guitar Adjustment and Care

This set-up guide will give some basic, measurable parameters needed to keep your Guild acoustic guitar in optimum playing condition. Since every guitar neck, saddle height, nut height, neck angle, fret, and top condition may be slightly different, using some average measurements can give any guitar a basic, comfortable "feel". Personal preferences in string gauge, playing style and technical ability will determine how closely to "spec" you'll want to set your own instrument; there is not one set of parameters that is perfect for everyone. This guide also assumes that you know the parts of your guitar, some basic terms, and that the guitar you're adjusting has no structural damage; (i.e. worn or popped-up frets, separating bridge, loose or broken top braces, cracked nut or saddle, cracked or loose neck joint.)

Necessary Tools

- Set of automotive feeler gauges (.002 - .025)
- 6" ruler (with 1/32" and 1/64" increments)
- Light Tung oil or lemon oil
- Small Phillips screwdriver
- 1/2" nut driver
- Tuning fork or electronic tuner
- Wire cutters
- Peg winder
- Polish and clothe

Strings

After an initial visual inspection of the guitar, the least expensive and most dramatic enhancement to a guitar's sound and playability is to install a fresh set of strings. We recommend that you use Guild phosphor bronze acoustic guitar strings. Most of the guitars are shipped from the factory with new Guild L350 light-gauge strings, (.012 - .052). The set-up measurements used here are based on the tension of these strings. Note: The tension of strings from different manufacturers may vary slightly depending on core diameter, wrap-wire diameter and winding techniques, and may affect the setup specifications.

Loosen and remove all of the old strings. While the strings are off the guitar, it's a good idea to clean and seal the fingerboard and bridge. Light Tung oil or lemon oil are fairly traditional sealers. Bee's wax compounds are also excellent. Don't use standard guitar polish on unfinished fingerboards or bridges as they can actually dry out the wood. Guild offers an excellent guitar polish (P/N 350-9501-000) that cleans the top, back, sides and neck of your instrument.

When installing new strings, there are a few things that can be overlooked and may cause some problems later on.

1. Make sure the ball end of the string is seated snugly against the bridge pin at the bridge plate; this will insure that no pitch slipping occurs; (this is usually the cause of what a lot of people think is "string stretch").

2. Carefully wrap the strings around the tuning posts downward from the tuning post anchor hole; two to three complete wraps around the tuning post on the bass strings, and at least three complete wraps on the treble side, but no more than five are necessary. This will maintain the proper angle of the string over the nut.

3. Bring the strings completely up to pitch. Even a quarter-step below pitch can relax the tension in the top (behind and in front of the bridge) and the neck, leaving the guitar sounding a little dull and lifeless. Remember: more tension in the wood = more volume and sustain. Once the strings have settled "up" to pitch, you can start to check some of the measurements that determine great playability. Doing the steps out of order will force you to go back and recheck things over and over, so... maintain the flow, and your instrument will fall right into "spec".

Check And Adjust The Neck For Straightness

Guild acoustic guitars are equipped with a "Standard" truss rod (there are two types of "Standard" truss rod; one which adjusts at the heel of the neck, and one which adjusts at the headstock, but both operate on the same principle). The "Standard" truss rod can counteract concave curvature, for example: in a neck that has too much relief, by generating a force in the neck opposite to that caused by excessive string tension. Note: All Guild 12-string acoustic guitars feature a double truss rod system.

Remove the truss rod cover, if so equipped, and apply a capo at the 1st fret. Press down the 6th string at the 14th fret with your right hand. With a feeler gauge, measure the distance between the top of the 5th fret and the bottom of the 6th string. There should be a small gap (.006"+/- .002"); remember this gap will be one-half the thickness of the 1st string (.012"). This will determine the "neck relief" necessary to prevent string "buzz" caused by the normal vibration pattern (string excursion) of the strings. Less than a .006" gap may cause a "buzz" or cause "fret out" if some high frets exist. On Guild guitars, use a 1/4" nut driver to turn the truss rod clockwise to straighten the neck or counter-clockwise to add some "relief". Note: Medium gauge strings (.013"-.056") have higher tension, with less "string excursion", needing more truss rod tension to counteract the stronger string pull. This results in more volume, sustain and more "wood" in the guitar's tone. Note: In either case, if you meet excessive resistance or need for adjustment, or you're not comfortable with this adjustment, take your guitar to your authorized Guild Service Center.

Check The String Height At The 12th Fret

Remove the capo from the 1st fret. While looking at the side of the fingerboard on the bass side, place your small ruler behind the 6th string directly on the 12th fret. Measure the distance from the top of the 12th fret to the bottom of the 6th string. This gap should be from .085" to .093" (5.5/64" to 6/64"). Now measure the 1st string in the same fashion; place your ruler on the 12th fret behind the 1st string, then check the gap between the top of the 12th fret and the bottom of the 1st string. This gap should be .070" to .078" (4.5/64" to 5/64"). If the gap is too wide, you must "shave" the bottom of the bridge saddle or replace it with a shorter saddle. Either way, you'll probably have to do some cutting, so it's just as easy to shave the existing one. If the gap is too narrow, you'll need to put in a taller saddle. You could shim your existing saddle in a pinch, but shimming can dull the tone if it doesn't fit properly; so you may as well just cut a taller saddle, making sure the "radius" (side-to-side arc) on the top of the saddle matches the radius of the fingerboard. Note: Guild uses a 12" radius fingerboard on all guitars shipped from the factory.

Adjust (Shave) The Saddle

Loosen the strings, but don't remove them from the tuners. Place your capo back on the 1st fret, you can now pull and remove the bridge pins from the bridge with no damage to the tuning post windings. Draw a light pencil line across the base of the saddle along the top of the bridge. Use pliers or wire snips to GENTLY lift the saddle from the saddle slot. Caution: Don't try to pry it up or you may chip wood away from the bridge slot. Using a flat file, remove an amount of material from the bottom of the saddle DOUBLE the amount of the 12th fret overage; (i.e. if your 12th fret gap is 1/64" too high, you need to remove 2/64"(1/32") from the bottom of the saddle). Drop the saddle back into the saddle slot and draw another pencil line across the saddle at the base of the bridge. Pull the saddle out again and check your work. The critical aspect here is to keep the bottom of the saddle flat and level so it sits flat in the saddle slot. If the saddle gets rounded off, you'll lose volume on the bass or treble side, or even worse, if your guitar is equipped with an electronic transducer, you'll lose response. When you have completed the modification to the saddle, re-install it into the slot, then re-seat the strings and re-install the bridge pins. Remove the capo and retune the guitar to pitch. Because you've taken the tension off the neck by loosening the strings, you must now go back and check the neck straightness (using the preceding procedures), as the truss rod may have shifted during tension release. Now remove the capo and recheck your 12th fret measurements. Repeat the shaving procedure if necessary. Note: If you feel you need this adjustment to be made and you're not comfortable with the procedure, take your guitar to your authorized Guild Service Center.

Check The String Height At The 1st Fret

Again, using the feeler gauge, measure the gap between the top of the 1st fret and the bottom of the 6th string; the gap should be .022" +/- .002". Measure the 1st string gap in the same fashion; with a feeler gauge between the top of the 1st fret and the bottom of the 1st string. The gap at the 1st fret should be .020" +/- .002". Each string must be measured and adjusted separately because you shouldn't remove the nut to shave the bottom as you would with the bridge saddle.

Caution: The following procedure should only be made with the proper files and a certain amount of experience. If you feel you need this adjustment to be made and you're not comfortable with the procedure, take your guitar to your authorized Guild Service Center.

Carefully cut the string slots in the nut with "nut slot files". Angle the string slots downward towards the headstock to relieve any pinching of the strings that may happen on that side of the nut. If you cut too deeply, the slot can be filled with a mixture of baking soda and crazy glue, and, after it sets, the slot can be cut again. Caution: the nut must be isolated with masking tape and wipe away any excess crazy glue with a piece of tissue paper to protect the finish around the nut. Retune your guitar, it should now meet factory specifications and "play like butter".