Planar Speaker Asylum

Welcome! Need support, you got it. Or share your ideas and experiences.

Planar Speaker Asylum

RE: MMG Blown Tweeter Fixable ?

45.33.135.145

In Reply to: RE: MMG Blown Tweeter Fixable ? posted by sferraro963 on April 16, 2015 at 08:42:02

Definitely a blown tweeter. Can't see a break in the foil anywhere, even under high magnification. Heard about 20 seconds of static before it went. Wasn't even pushing them that hard at the time. Kind of baffling. Can replacement panels be purchased? Was gonna buy a pair of .7 and move these into another room. Guess I'll be headed to the local dealer Monday.

Follow Ups:

RE: MMG Blown Tweeter Fixable ? - JBen 07:48:39 04/19/15 (0)
Hmmm, I thought I mentioned some of this before but the brain cell may be slipping.

See if you can disconnect at the foil terminals. On checking continuity from there, you are eliminating other factors. One thing that could still be happening -- that I've seen -- is a failure at the foil terminal. I've see both a bad contact under the metal plate and...I also broke the foil there once...don't ask how : - ))

If none of this pans out and you have to look up the (likely) break elsewhere, here are 2 things that may help:
- Put the meter on impedance mode at the terminal. Using a blunt somewhat pointed object LIGHTLY press on foil at various points...while watching the meter. (Use anything common-sense; I used a pencil eraser...because I am naturally prone to break things.) In this case, mechanical movement at the hairline break caused a brief contact.

- I also tried -- but the above worked fine -- the 2 pointed (sharp-ish) probes of my meter on several 1" long suspected foil segments. However, I got fearful of my tendency to push harder than I should. So, I stopped and tried the method above. (Once I knew where the break was, I tried this one again and confirmed it worked. OTOH, this one worked for someone else who tried the first one without success.) You do have to close the contacts at the foil terminals so that a circuit can be completed.
RE: MMG Blown Tweeter Fixable ? - Green Lantern 22:08:08 04/18/15 (2)
No warranty? Did you call Magnepan about the problem initially? Seems like any type of warranty would be longer than 18 months (provided you purchased them new). Obviously they wouldn't be able to entertain this since you've gone beneath the cloth; but I'm just curious.
- RE: MMG Blown Tweeter Fixable ? - sferraro963 05:57:58 04/19/15 (1)
  Gonna call Monday morning. I'll post what they say for future reference.
  - RE: MMG Blown Tweeter Fixable ? - Davey 06:48:04 04/19/15 (0)
    You should be able to see something. Use your ohmeter to start probing the transducer at the approximate half-way point and narrow the problem down. It's there somewhere and more than likely fixable.
    
    Dave.

Post a Followup:

FAQ

Post a Message!

Forgot Password?

Moniker (Username):
Password (Optional):
	Remember my Moniker & Password (What's this?) Eat Me
E-Mail (Optional):
Subject:

Message:	(Posts are subject to Content Rules)

Optional Link URL:
Optional Link Title:
Optional Image URL:
Upload Image:
E-mail Replies:	Automagically notify you when someone responds.

To view your new posting or follow-up, click on the RELOAD or REFRESH button on your browser.

This post is made possible by the generous support of people like you and our sponsors:

Atma-Sphere Music Systems, Inc.