A couple years ago, I had a great Craigslist find- JBL SR4725 PA speakers. These house a 2226h woofer and a 2426h compression driver, on a 2370 horn. They were rather inexpensive, I believe $100 or $150, with the caveat that the compression drivers had blown diaphragms. This was an easy sell- MSRP for the raw drivers is on the order of $400/per. These are serious woofers and compression drivers. Upon testing, the titanium diaphragms of the 2426h were definitely blown, and needed replacement. Being in Southern California, I am fairly local to OC Speaker repair, so spoke to their manager on duty and scheduled a brief tour. As you, my faithful readers, remember, I'm something of a repairer myself (see DIY article here), though not in any commercial way, and thus was very interested to see the facility and what sort of toys they have.
OC speaker is one of the largest speaker re-coning facilities in the world, and has a large inventory of loudspeaker drivers, parts, and accessories. They are authorized dealers for JBL and Eminence (and others), and authorized service center for most major brands of loudspeaker. They are in a pretty decent sized facility, at 8000 square feet, nestled in a nice little industrial park in Garden Grove, CA. This is a family owned operation, with the Sunda clan at the helm, and has been in operation since 1968.
Upon entry to the facility, I poked around the showroom, The showroom was well-stocked, but only reflected a small selection of their inventory. Very cool stuff, and I loved the wall of woofers. These are "Real" woofers, not the car audio nonsense from Best Buy. Big motors, high power handling, high sensitivity, big boxes.
On To The Inside Scoop
There is an energizer for recharging AlNiCo woofers. The repair article has a little more information. Essentially, overdriven AlNiCo woofers tend to lose magnetic strength. This requires recharging, and the pic below is the machine that performs this service. It can be a major issue, as much as 3dB sensitivity can be lost.
There is a heck of a lot of inventory, with a huge number of completed drivers on the shelves, as well as cone, dustcap, diaphragm, and voicecoil assemblies. If it is a loudspeaker, they likely have the parts that fit, even if the factory parts are unavailable.
No shortage of parts here, eh? And they also have a number of jigs assembled to allow custom fabrication when the need is there. Most loudspeakers use fairly common/similar parts, so adaptation is usually fairly close to the original. Some exceptions exist, naturally, like woofers with heavy coatings (JBL's coated woofers come to mind, Hartleys too). Shown is a jig for sizing/shaping dustcaps:
Orange County Speaker
Voice: (800) 897-8373