JLD Bridge Doctor

JLD Bridge Doctor

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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
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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.

Customer Reviews

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4.5
  • 4.63 average rating from 148 reviews
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5.0

Great device and not just for fixing bellying

By

Verified Buyer


I do guitar repair and have installed these things on at least a dozen guitars at this point and I love them.

1. A couple thing to note: What John Albanese said below! If you're working with a bridge that tapers toward the back edge or is already thin, the countersunk head can split the bridge. I put a small washer in there to keep it from doing this.

2. I recently installed one of these an an Alvarez cedar-topped guitar. I know this guitar inside and and out; have been playing it for years. The Bridge Doctor not only corrected the bellying, but improved the sound SIGNIFICANTLY. I'd only used the device on spruce-topped guitars before this and had noticed a slight improvement in sound on some guitars, no change on others. But on the cedar top, the improvement is huge! In a recent issue of *American Lutherie*, someone who observed a similar improvement in sound suggested that it has to do with stiffening the top and working the way a Compressor does in recording; it focusses the sound. I don't know about the principles involved, but the effect on this particular guitar was dramatic.

5.0

Great fix!

By

Verified Buyer


I've seen varying reviews of this little gizmo so was unsure as to whether it would work. I have a few guitars needing a neck reset that frankly aren't worth the expense but are still worthy of a few more years of playing so I thought I'd try this on an old 70's Aria Martin copy. Great sounding guitar I found covered in dust in a junk shop, but a little abused. The action and bulge, although playable were about at the end of their run and something was going to be needed shortly. The installation was a breeze especially with the StewMac instructional video. I had it installed in about 30 minutes, and I'm no luthier. Drilling the hole takes a little care and a hand drill is recommended. Really satisfied with the results. The bulge is gone and the guitar geometry is spot on. The old Aria hasn't played that well in about 40 years I'm sure. I'd recommend it. It may not solve every issue but as a starting point, this little guy is a gem.

5.0

JLD Bridge Doctor

By

Verified Buyer


This Device does a Great Job in pulling down The Belly that most Flatop Acoustic Guitars get over time . I put a lot of Them in . Happy customers. Luthier Andre Childers at
Back In The Day Vintage Guitar Repair and Restoration. The 1955 Gibson LG 1 came in
With a Nice Belly and a tired Bridge and Bridge Plate . Used a nice Ebony Bridge to replace Narrow Original with Bridge Doctor all is well now .

5.0

I'm a fan of the bridge doctor

By

Verified Buyer


- I first installed this in a Dean acoustic bass that had a significant bulge in the sound board. I was not able to take it all away, but it did come down a bit and is stabilized. I may tighten it up a little more sometime to see if it moves any more. I really can't say I noticed any an difference in the sound one way or the other.
- Next installed in a cheap Dreadnought sized Oscar Schmidt acoustic with a bulging laminate top that I take camping and throw about. I'm convinced it increased the sustain noticeably and it sounds surprisingly good overall.
-Just bought another for a Martin DCX1e I bought with a damaged sound board. Once I finish the repairs, I'm installing a bd for good measure.

4.0

Fastest belly repair.

By

Verified Buyer


This is my third bridge belly repair but the first store-bought JLD Bridge Doctor. Super easy to install. My only concern is the screw included. It's a little sung. Otherwise, it works great! And may improve the tone of the guitar.The included dot covers the screw. You'll never know it's there!

4.0

So close yet so far away. . . Worked but didn't

By

Verified Buyer


I purchased the screw version of the JLD Bridge Doctor last week and it was received and installed today. Main reasons for buying this was (1) to removed the belly bulge that has developed over the years and (2) to lower the action on the strings to make the playability better (by lowering the bridge area's bulge. The guitar for repair is an old Epiphone PR200 that I have had for over 25 years. Yes, it's a cheap guitar and not worth much money wise but it has a history, lots of miles and I love the sound I get from this old thing. Can't find another acoustic that gives anywhere near the same sound.

So. . . Installation was simple and took me about 15 minutes. Adjusting the belly bulge out was done in increments to let the wood settle and I didn't want to take the chance of splitting something. The bulge that has developed had about 3/4" on each side with a straight edge placed behind the bridge. After adjusting I was able to get it down to about 3/16" and called it good. So for removing the belly bulge the JLD Bridge Doctor worked as advertised and scores top marks. That being said, the action only improved by about 1/16" Move the bridge down by over 1/2" by removing the bulge and the action pretty much stayed the same. {Sigh} More trouble shooting ahead.

5.0

Good product **BUT** There is an issue

By

Verified Buyer


I had installed the one with the screw on one guitar and it works great. Takes the belly out nicely.I bought the brass pin model to install on my 1968 Martin D28 because I didn't want to drill a hole. The brass pins are not good as supplied. First off the string does not sit up to the ball end. It stops where the string widens and if pulled into the hole the bottom winding for the ball end, ends up resting on the saddle. This is bad. I figured out a solution. I made .156 (5/32) long pieces of brass tubing to put the string through first. The tubing I have in my shop has a .135 diameter with a .098 hole. I slightly countersunk the side the ball rests on. This solved all the problem by allowing the string to seat properly and lengthen the post enough so the string hits the saddle properly. See my pic.

2.0

Beware the counter sunk screw head

By

Verified Buyer


For every action there is an equal opposite reaction. I installed the device, tightened the set screw just enough that the trust post would not spin under finger tight pressure and split the back of the bridge out. The guitar acclimated to a 50% humidity environment for three days before installation. I recommend swapping the counter sunk screw with a proper pan head, binder head, or cheese head screw with a washer. I believe the counter sunk screw acts like a wedge and parts the weaker back of the bridge from the stronger front of the bridge. Mid 70s Alvarez 5014 will need bridge repair now.

Response from StewMac


We're sorry the JLD Bridge Doctor did not work for you as you expected. Our friendly customer service team is always here to help at 1-800-848-2273 if you would like to address this issue further.

5.0

JLD Bridge

By

Verified Buyer


A must have for a dreadnaught - especially if you like using heavier strings.

5.0

Lifesaver!!

By

Verified Buyer


The Bridge Doctor coupled with a refret, new bone saddle and nut and my 40 year old Ventura 12 string is alive and well. Plays better that it ever has. The Bridge Doctor remedied a really bad bow under the bridge. So simple and so amazing.

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