You just need to go scrounge around at the south of the border plant Jeff, judging by the looks of the second one they sent you they must use them for tire chocks down there.
If we knew what the hell we were doing, we wouldn't call it research would we.
I am a guitarist and and have reconed many D120Fs with the E120 kit. The end result is a K120. In every instance so far, the feedback has been unanimous that it's an improvement in every way. Power handling, durability, low frequency response, smoother and less shrill upper midrange. Many players like the sound of the ceramic E120 due to the more accurate and fatter mids and tactile response from the bigger motor despite the weight gain.
YMMV...but better is better when it lets the player do more with his/her amp and guitar. It's a different market and use, indeed, from HiFi.
Does no one here read Voice Coil magazine and/or have seen the Loudspeaker Inindustry source book?
The "OEM" stuff is mostly Chinese-made if you believe the ads and who they produce for. Precision Econowind in Florida makes the coils for the DD speakers, and you as an individual can by samples straight from them.
I can't speak for the rebuild kits that were made back in the 80s, but chances are very great if the speaker was made in the last 15 years, the original parts were more than likely sourced from China.
Just because an ad with a picture of a voice coil that fits a JBL driver doesn't mean that is the OEM producer.
I use Precision Econowind voice coils in speakers that I build for another company and they are very good. I have also seen Precision Econowind edgewound voice coils that are meant for the D/K/E series speakers. They are not the same as OEM construction but you have to know what to look for to know that, and what the various failure modes are.
So to answer your question, the answer is yes. There are also US/North American producers of soft parts that supply JBL/Harman.
To say that all the parts are sourced from China, I believe, is inaccurate.
The oldest issue I have for the Loudspeaker Inidustry Sourcebook is 2009...and in it is an ad for Po Yun Enterprises. This ad lists who the OEM for- B&C, Faital, Matsushita, Pioneer, Philips, and Harman.
But I thought you you said Precision Econowind? They are now the same company after PY bought PE.
There are very few US sources for soft parts these days, but more sources for that than say magnets and baskets.
Last edited by winslow; 12-19-2011 at 10:00 PM. Reason: link bad
But I never said ALL soft parts were sourced from China...just that a lot are sourced from China regardless of where the speaker is assembled. There are still a few US companies making said parts.
And it is sad that this is the case.
That said, the voice we coils get from Precision Econowind for guitar speakers come from Florida.
Po Yun bought Precision Econowind...they are the same company.
Look at the link I posted, it has a few small companies they OEM for. I am sure if it weren't true, then some of them could do something about it.
And another link:
And you're also stating that Precision Econowind doesn't make voice coils in it's Ft. Meyers, Florida facility?
If you dig a little into the internet, you'll discover on the Po Yun website "Customers" link that Harman/Becker Automotive is a customer. JBL Professional is not listed. Precision Econowind is listed as a customer...in line with Precision Econowind's statement that they are the sole US contact/agent for Po Yun.
No offense, but you are being a bit dense aren't you? I didn't say any of that.
But on the Po Yun website they list GGEC as a customer and they do make the some/all of the woofers for the Synthesis system and some components of a couple Pro Audio pieces.
I said- Po Yun bought Precision Econowind. They make voice coils for some HI products. They are advertising in a picture ad a dual coil voice coil...Differential Drive?
I said- back in the day chances were good that nearly everything could have been made on this continent. Now, chances are good that nearly everything is sourced from China. That it is getting harder to source components in the USA.
I don't see what is so hard to grasp.
The thing that's hard to grasp is your supposed expertise in this subject. You're now up to post number 11. Apparently you just joined this week to school us on JBL lore. Why is that?Precision Econowind, Inc. is a privately owned American company that manufactures custom coils for the loudspeaker, medical, aerospace, and many other industries. Loyal Tingley, Jr. and his son Terry started the business from a one-car garage in Bokeelia, Florida in 1972. Today Precision Econowind, Inc. is owned and operated by Terry Tingley and Dean Wiant. Precision has become one of the world's premier custom coil manufacturer that supplies many of the largest companies around the world in many different industires.
At Precision our goal is to consistently provide the highest possible quality, at a competitive price, with on-time delivery. Our specialty has been voice coils for the loudspeaker industry, and we are very proud that our coils are used in speakers made by companies worldwide. Since then times have changed as we have branched out in to other industries from our core business of voice coils for loudspeakers to high quality custom voice coils for medical, OEM, Aerospace and just about any other industry that uses custom voice coils in their products. Specializing in voice coils has given us experience in winding precision layered coils using bondable wire. This skill is the foundation for many of our other custom coils, especially freestanding coils that require the most efficient possible use of space, which can best be accomplished using precision layered winding with no bobbin or core.
We occupy 32,000 square feet of manufacturing space in Southwest Florida. Our winding machines and tooling are custom designed by us and built by our own machine shop specialists. For coils requiring high temperature resistance we coat our own wire and form material with high temperature adhesives.
Harman's manufacturing base is now in Mexico with R&D and prototyping still in Northridge.. BTW...What is your relationship with Harman and from where do you get your info?
Harman/JBL sources all of their drivers from different vendors (one of them used to be JBL Professional Manufacturing in Northridge until some jackass saw fit to disassemble it). I know many of the smaller Synthesis drivers are made in China. Some of the engineering is also done in China. A visiting Chinese engineer actually designed all the mf and lf inverted dome transducers in the JBL Performance Series with our favorite JBL engineer overseeing the endeavor.
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