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JLD Bridge Doctor

4.5
  • 146 Reviews
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JLD Bridge Doctor Screw mount

Screw mount

Item # 3694
In stock, ready to ship!

$22.50

3 or more $20.02
+
JLD Bridge Doctor Brass pin mount

Brass pin mount

Item # 3695
In stock, ready to ship!

$52.75

3 or more $46.95
+
 
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JLD Bridge Doctor

About This Item

• Enhances volume
• Flattens 'bellied' soundboards

A unique solution to a common bridge problem, this spruce device attaches beneath a guitar bridge. An adjustable spruce "pressure post" rests against the tailblock, providing leverage to flatten the soundboard.

The spruce block is 3/4" x 1-5/8" x 3-3/8" tall. The 1/4"-diameter tension rod is 9" long. The mounting post has three different positions to accomodate a variety of bridge styles.

Screw mount: This spruce device attaches beneath the bridge via an inlaid screw (a white pearloid dot is included to hide the bridge screw). An adjustable spruce pressure post rests against the tailblock, providing leverage to flatten the soundboard. Better bridge contact and alignment can also enhance sound projection.

Brass pin mount: The pin-mounted version of the JLD Bridge Doctor attaches beneath the bridge using a threaded brass bridge pin. The strings mount horizontally through the tops of the matching brass bridge pins (included).

StewMac Tech Tip: We recommend the brass pin mount version for 12-string guitars.


Instructions

Product Instructions

JLD Bridge Doctor Instructions

How to install the JLD Bridge Doctor in an acoustic guitar.

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4.5
  • 4.62 average rating from 146 reviews
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5.0

Great product assuming you have knowhow...

By

Verified Buyer


I highly recommend the Bridge Doctor if you have some experience building or repairing guitars. It's a very simple device, but installation has a few twists. You need to be able to control the depth of the hole you drill. Don't use tape, use a physically robust stop like a collar. Also, a neat trick, if you have any, is to use a very thin piece of scrap rosewood to cover the hole instead of the included pearl dot. Your repair can be virtually invisible if you want. This is for the screw mount item. I haven't used the brass pin Bridge Doctor.

5.0

Love this little gadget !!

By

Verified Buyer


I had a 20+ year old Cort Dreadnought with, among other things, a separated bridge that had been originally glued over the finish (ten years of attic storage, bad idea). After fixing this, I still had the problem of a badly bellied guitar. Gave this a try, and couldn't be happier (used the screw-mount model). I think it actually sounds better than it did, when new. It's definitely got a lot better low end. Brought it into a music store, since they didn't believe that this old, cheap, Korean instrument could sound as good as their big name premium models. Only their top "ask before testing" models could beat it. Mine cost me under $400, and had been anything but pampered, for a couple of decades. They couldn't believe the sound, either. Sound is subjective, I know, but there were three guys in the room who actually deal with instruments every day. I think the very vocal "expert" I'd originally discussed it with was actually a bit embarrassed. I'll be using this again, if I have other acoustics. Thanks to this little guy, however, I don't need a new one, now.

5.0

Great Product

By

Verified Buyer


I have an older guitar that i had to ship to another state to have the bridge & pickguard reguled. I also had some fretwork done to this guitar in a neighboring town. The bridge again was starting to separate and it did have a bellying problem when i bought it used but I did not want to put a lot more money into it. But it does have a nice aged sound. So I read all the reviews here and what ever information I could find before ordering, as i did not have much choice than to let the guitar sit or sell it as is. So i ordered the JLD Bridge Doctor and took my time installing it. It works. My guitar is much improved. I tightened it after a couple weeks. It sounds, plays, and looks a lot better. This is a great product. Thanks for a great product and to the others for writing their reviews. That helped me a lot.

5.0

awesome

By

Verified Buyer


This thing is really amazing - so simple, yet so perfect. You'd think that adding mass would deaden the guitar, but because of the redistribution of tension, it actually opened up the guitars I put them on - and besides, unless it's an instrument of great collector value, what's the point of a guitar you can't play? In the case of my '68 Goya Cowboy T-23 Verihuge, or whatever it's called, it made the guitar "tighter" sounding sort of like it has compression on it - which I guess it does in a way - but the bottom is still fat. It's not the thinnest top in the world, but it's aged beautifully, and the materials are superb. So it's sort of big and warm now, and also - PLAYABLE! On the other hand, my Larrivee D-03 that I got 2nd hand (serial 083!) has a VERY thin top - a beautiful design, but fragile - not suited for the dry NM climate, or at least w/o careful humidification - was cracked and bulging/sinking like mad. I filled the cracks with Titebond II several times over a few months and then added the Doctor. WOW - not only did it become playable (very nice) it got punch like it probably had new - but as it's oldish now, warm and sweet too. The idea of relieving tension on the lower body behind the bridge is real, I believe. It seems to allow the booty to come back to the instrument.*******All-in-all? Easy to install if you have any mechanical skill, and a real life extender for my bunch of possible has-beens. I'd recommend professional installation for those who are not adept with tools - all I care about is tone, and you can easily mess up the looks of your baby if that matters to you.

5.0

Screw Mount

By

Verified Buyer


Pretty slick arrangement. Simple to do, just try not to misplace that little white thingie! It is in the Twilight Zone as far as I can figure. And I really dont know where to find the silly thing, So i painted the screw black and it works for the $40 guitar it is installed in. Sound got better too.

5.0

Did the trick

By

Verified Buyer


If you have a guitar with a bulge, try this it works, don't rush it adjust a little and wait, give the wood time to respond, ( the bulge didn't happen over night) then adjust some more, it will pull back in to tolerable measurements..sound is good... sustain is better.. stays in tune better, all around good device..

4.0

Worked great!

By

Verified Buyer


This was my first attempt to correct a 70s era Takamine 12 string which had bad action. I was able to restore proper intonation and action with a combination of truss rod adjustment, some sanding of the bone saddle and installation of the screw mount version of the JLD truss. Placement of the screw hole was critical to avoid blocking any of the pin mount holes, but installation was smooth and the effect was immediate. The soundboard had a slight belly as well which was corrected and the sound is still great. Overall I am pleased with the result and will definitely try this again should the need arise.

3.0

JDL Bridge Doctor

By

Verified Buyer


As others have mentioned, the instructions are not very clear or intuitive. If you look at the diagram it appears the block must sit on a brace on the bottom. This was not an option or even necessary or desirable. I installed mine on a 12 string with a severe belly problem. Through research I found it would help to humidify the box and to stack a weight on the top for about a week or more to stabalize the flattened position prior to installing the bridge dr. This would negate having the bridge dr. do all the work. On the positive side, the belly did stabalize with the bridge dr. On the negative side, the tone completly dissapeared. It went from a ringing sound to a thud. The need for all the brass pin replacements and having to keep the bridge dr. fairly tight were probably the cause. I ended up removing it and have built a new bridge, which is incomplete at this time (saddle slot). I think the idea is sound and it may work in some instances. I would try it again on a lesser problem guitar, but not on another 12 string.

5.0

JLD Bridge system

By

Verified Buyer


Installation no problem on my 12 string. If you take care drilling and follow the directions carefully, it's about a half hour job (adding in first time "think about it" delays. Love the product and considering installing it on my 6-string Tak just because.

4.0

Is there a Doctor in the house?

By

Verified Buyer


Well now there are two! I bought the the screw mount but when it arrived, I realized that it wouldn't work on my j200 because of the curved pin line and no room for the screw beneath it but I'll keep it for another guitar. I ordered the brass pin mount, installed it and it works as advertised, flattening the belly, bringing the action down and allowing for better adjustment and enhancing the sound. A side benefit was almost subconcious. Before the doctor was installed, the belly bulge and bridge tilt drew my eye like a wart on someone's nose or an infected lip piercing. Now things are as they should be! My only issue was that on first application, I (yep) broke the dowel. Did I tighten it too much, too quickly, or would a hardwood dowel be the answer? Or would that affect the sound adversely? Or is there a built in fail-safe provided by the pine dowel, allowing it to break before something else does? Whatever, it is easily replaced (I stole one from my other kit temporarily) and my second try went better, adjusting it a little at a time over two to three days which I obviously recommend now. Delayed gratification pays off. The guitar is being played again!

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StewMac PDF Catalog, page 31 See JLD Bridge Doctor
on page 31 of our StewMac Digital Catalog