Wharfedale ID1: Isodynamic - diyAudio
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Old 18th January 2010, 03:19 AM   #1
sachi is offline sachi  United States
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Default Wharfedale ID1: Isodynamic

It so happens that while i was looking to re cable my vintage pair of Wharfedale Isodynamics, the pro genesis to commercial orthodynamic headphones, i messed it up and yanked on the cable joint a bit too hard.
The trace wire came right off, so with my heart in my mouth I gingerly went about opening up the ID1 to see if there was any hint of a trace wire left so I could resurrect this wonderful fugly headphone and in the process figured I'd post pics of the diaphragm.

Click the image to open in full size.

There are a bunch of them and all high resolution. so 56k users beware...

The fact taht this headphone was built for a measly sum of 20 quids back in the beginning of the 70s shows in the way they have used plastic posts to hold the magnet structure togethere and the diaphragm is stretched by placing it within these posts.
Simple construction really. Rubber magnets, from a refrigerator or a washing machine rounds up the most inefficient of orthodynamic headphones ever made...and perhaps headphones in particular.

Will try to reattch the wires without worsening the situation.

oh and hey!!..what do you know, a headphones section on diyaudio.com..huzzah!! Click the image to open in full size.
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Old 18th January 2010, 03:22 AM   #2
Smeggy is offline Smeggy  United States
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Sach, I can't believe you tugged it's wire off!!

Bad sachu!! I've done the same with a few Fostex T50s Took the pad clean off the PCB
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Old 18th January 2010, 03:25 AM   #3
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Damn dude, you scored the first post! Congrats!
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Old 18th January 2010, 03:44 AM   #4
dBel84 is offline dBel84  United States
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Quote:
Originally Posted by BoilermakerFan View Post
Damn dude, you scored the first post! Congrats!
and quite aptly an orthodynamic one to help us ponder our meager beginnings.

Hope you get that trace reconnected sachi, it would be a shame to lose the headphones..dB
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Old 18th January 2010, 03:49 AM   #5
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Oh, and Sachi, only one pic is showing up and it will not enlarge... Not sure if it's the linked image or the new forum though.
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Old 18th January 2010, 04:43 AM   #6
sachi is offline sachi  United States
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Quote:
Originally Posted by Smeggy View Post
Sach, I can't believe you tugged it's wire off!!

Bad sachu!! I've done the same with a few Fostex T50s Took the pad clean off the PCB
man i almost died when that side started reading open.
Quote:
Originally Posted by dBel84 View Post
and quite aptly an orthodynamic one to help us ponder our meager beginnings.

Hope you get that trace reconnected sachi, it would be a shame to lose the headphones..dB
Happy to report that the surgery is successful. Am going to put away the thought of recabling these for another time. Right now, I shut the driver with super glue and have a clamp to keep it tight for the night. Will put it back together tomorrow and see how she sounds.

Going to remove the front baffle protection cover and see if it makes any difference. The cover they are using is a thick plastic material with holes in it. In no sense of the word is it acoustically transparent, but we'll see if it there is more to the plastic protection cover tan just to keep dust away from the driver.
I am amazed by the simplicity in the design of these headphones. Blown away really.

Quote:
Originally Posted by BoilermakerFan View Post
Oh, and Sachi, only one pic is showing up and it will not enlarge... Not sure if it's the linked image or the new forum though.
Yeah no idea why..but, here a link that should work. Again 56k users, i wouldn't bother.

Yfrog - id1diaphragm008 - Uploaded by sachik
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Old 18th January 2010, 06:34 AM   #7
Smeggy is offline Smeggy  United States
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Man that brings back memories seeing it like that. Pleated ribbons rule
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Old 18th January 2010, 07:48 PM   #8
Kabeern is offline Kabeern  United Kingdom
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Sach! , hope it works.


Quote:
Originally Posted by Smeggy View Post
Man that brings back memories seeing it like that. Pleated ribbons rule
Is it a ribbon? It's curious that it is pleated like that, I didnt expect it (no way do I want to dismantle my pairs drivers to take a look...).
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Old 18th January 2010, 10:36 PM   #9
sachi is offline sachi  United States
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yay!..she lives once again...still stays true to the fact that she is among the best balanced orthos out there. am soo happy to be able to listen to the Wharfedale Isodynamic again.
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Old 18th January 2010, 10:52 PM   #10
sachi is offline sachi  United States
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here is a pic of the diaphragm and the magnets..truly unique design..a single rectangular rubber magnet with posts on the magnet holders for the diaphragm to slot into so that it is stretched over between the magnets.

Click the image to open in full size.
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