JLD Bridge Doctor

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JLD Bridge Doctor Screw mount

Screw mount

Item # 3694
In stock, ready to ship!


3 or more $20.02
JLD Bridge Doctor Brass pin mount

Brass pin mount

Item # 3695
In stock, ready to ship!


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.


Product Instructions

JLD Bridge Doctor Instructions

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

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  • 4.50 average rating from 86 reviews
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My 12 string, strings were getting so far I could not play it.

(Customer's Reviews)

I bought the JLD Bridge Doctor actually because of a friends recommendation because I said I would probably throw the guitar away.
He told me you need to go onto Stewart MacDonald's and get the bridge doctor and that would take care of the problem because he did the same thing.
I never knew they sold something that would straighten up the bridge again and here it is.


Love this product

(Customer's Reviews)

I put it into my Masterbilt that is only a little over a year old. Even with keeping it humidified and in the proper temperature range it was beginning to belly up. It had also lost some of its beautiful tone. I installed the Bridge Doctor. Took me about 2 hours but I was being very careful, and meticulous. It took the belly out and re-leveled the bridge. With in a couple of days the beautiful tone returned to my guitar. I think once the stresses are removed from the spruce top it really allows it to vibrate as it should. I could not be happier. If I ever get another acoustic guitar I will put a bridge doctor in it first thing.


JLD Bridge Doctor is a fantastic invention. Better than I expected and my repair was swift and sure.

(Customer's Reviews)

Excellent improvement over pre-existing.
Seems to have done the job intended to a better than expected standard.
I had two flattops, my own actually, that had belly-up issues: one is an Italian built EKO Ranger 12; the other is a Gibson B-15, student model 6-string. I decided to try the JLD Bridge doctor on my own guitars before attempting it on a customer's repair. Both have height adjustable bridge saddles. The guitars have always been tuned to concert pitch, and the EKO has a two-way trussrod and a double T beam in the neck. There has never been a neck issue with either insrument. The bridge on the EKO had been reset at some point and although the remount held, the top went belly-up from years of string tension. About 20 years ago I had cleated the top on the B-15 as it had cracks and needed a brace replaced when I got it.I installed the standard on the EKO. The bridge has enough room to drill the mounting hole. The B-15 has a small bridge and so I installed the model with the brass pins. The installation in each case took about 45 minutes. The height adjustable bridges were a huge help as the saddles had never been shaved although the EKO had been replaced twice before, and restoring bridge height was simple. Currently, the action on both instruments is low and similar to Les Paul specs, which is my preference. Both are tuned to concert pitch without any return to the previous condition and the sound is clear and even across the range. The sound of the EKO sparkles and intonation is almost perfect. The sound of the B-15 is improving the more that it is played. No rattles, good intonation all the way up the scale, even beyond the 12th fret; in fact the sound and action beats many new lower end instruments I've worked on. My total outlay for the JLDs and new string sets was less than $100 for both guitars, not for each. Some reviewers have complained about the balled ends being exposed on the brass model. In the case of the B-15, the pin holes had worn considerably larger with age (it is an early B-15) and so I shimmed each brass pin with a 5 mm brass washer which fit perfectly and covered the old holes. Certainly the balled ends are exposed, but the sound is clear, the action is great and the guitar is VERY playable. I think a few words of caution. The JLD comes with three pre-drilled holes. These allow for some placement adjustment. Do that first OUTSIDE the instrument so that the lifting side of the cantilever is under the saddle. This enables it to work well in lifting the bridge into place and aids in the sound of the instrument. The B-15 has its original rosewood saddle; I plan to replace it with micarta which has similar characteristics to bone but is easier to work with. That will richen the B-15 further. It is important to be conservative in tightening the setscrew. It does NOT have to be torqued tight to work and is best if it still has some room for further adjustment if needs be. But I have both tuned to concert, including the EKO 12 and the sound is crystaline but very full and rich in spite of the highs, and the tops are both flat. Realize that flattops, particularly Gibsons, are sometimes not completely flat, so you have to discriminate conservatively. I've already been approached by the music minister at my church who wants a re-cond of his old Fender Malibu. He's played my guitars on occasion and is totally amazed at the transformation.

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