speaker repairable?

kanifee · 2nd July 2008, 01:35 PM

Hi, first post in this section and sorry to say it isnt a happy one

, ive recently been building myself a lm3886 based chip amp, it hasnt been the smoothest road but im getting somewere now so im a bit pleased.

The other day i built and tested my left channal of the amp, the speaker made a crackle and hiss and then the lm3886 chip fryed itself, i still dont know what made it happen but today i installed a new chip and its working a treat, bad news is ive discoverd my mid driver in the speaker that was rigged to it when it popped is now not working, ive tryed it in the case and ive even taken it out and tryed it without the crossover but theres absoloutly nothing coming from it, is this repairable, a new driver will only be around £20 but i dont really have the cash at th eminute, i fear it isnt repairable but i thought i would ask any way just to be on the safe side.

SY · 2nd July 2008, 01:48 PM

Chances are you've fried it. To be sure, disconnect it, then take a 1.5V battery and make/break connection with the driver a few times (polarity doesn't matter for this test). If the driver goes "click!" and moves when you do this, it may be OK and you'll be replacing crossover parts. If it doesn't, time for a new driver.

Iain McNeill · 2nd July 2008, 03:29 PM

Can you ohm out the voice coil? If it's infinity ohms then you blew the voice coil. If its 2-5ohms it may still be ok. The voice coil may have jumped out of the gap - if you work from behind, through the frame you may be able to tease it back it. Is the cone jammed or does it still move in and out?

Whats the make/model?
Many better speakers have recone kits.
Madisound and other here in the US have generic recone kits .

kanifee · 2nd July 2008, 05:34 PM

the cone still moves though its very slow and sticky, there eltax monitor III bookshelfs.

Iain McNeill · 2nd July 2008, 07:30 PM

not good

The voice coil has probably exploded and unwound itself inside the magnet.

I assume you've checked out this quick google search
http://www.eltaxserviceshop.com/prod...5&sub=0&page=2
33euros could be worse!

Not sure you'll find a recone kit for these

2nd July 2008, 01:35 PM	#1
kanifee diyAudio Member Join Date: Apr 2008	speaker repairable? Hi, first post in this section and sorry to say it isnt a happy one , ive recently been building myself a lm3886 based chip amp, it hasnt been the smoothest road but im getting somewere now so im a bit pleased. The other day i built and tested my left channal of the amp, the speaker made a crackle and hiss and then the lm3886 chip fryed itself, i still dont know what made it happen but today i installed a new chip and its working a treat, bad news is ive discoverd my mid driver in the speaker that was rigged to it when it popped is now not working, ive tryed it in the case and ive even taken it out and tryed it without the crossover but theres absoloutly nothing coming from it, is this repairable, a new driver will only be around £20 but i dont really have the cash at th eminute, i fear it isnt repairable but i thought i would ask any way just to be on the safe side.

2nd July 2008, 01:48 PM	#2
SY diyAudio Moderator Join Date: Oct 2002 Location: Chicagoland Blog Entries: 1	Chances are you've fried it. To be sure, disconnect it, then take a 1.5V battery and make/break connection with the driver a few times (polarity doesn't matter for this test). If the driver goes "click!" and moves when you do this, it may be OK and you'll be replacing crossover parts. If it doesn't, time for a new driver. __________________ If there's a sucker born every minute, where do the rest of them come from?

Thread Tools	Search this Thread
Show Printable Version Email this Page	Search this Thread: Advanced Search

Similar Threads
Thread	Thread Starter	Forum	Replies	Last Post
nakamichi cd400, repairable??	an2ny888	Car Audio	0	1st July 2008 12:07 PM
Repairable or Rebuildable? Help a noob.	tjh	Full Range	12	3rd March 2005 10:23 PM
Repairable?	eXn	Subwoofers	10	18th February 2005 09:39 AM
Jmlab 703 Opium. Repairable?	Netlist	Multi-Way	10	9th October 2003 03:59 PM

New To Site?	Need Help?
Register to Participate Search Privacy Statement Contact Us	Frequently Asked Questions Did you forget your password? Mark Forums Read


	Please consider donating to help us continue to serve you. Ads on/off / Custom Title / More PMs / More album space / Advanced printing & mass image saving

2nd July 2008, 03:29 PM	#3
Iain McNeill diyAudio Moderator Emeritus Join Date: Oct 2007 Location: Santa Cruz, California	Can you ohm out the voice coil? If it's infinity ohms then you blew the voice coil. If its 2-5ohms it may still be ok. The voice coil may have jumped out of the gap - if you work from behind, through the frame you may be able to tease it back it. Is the cone jammed or does it still move in and out? Whats the make/model? Many better speakers have recone kits. Madisound and other here in the US have generic recone kits .

2nd July 2008, 05:34 PM	#4
kanifee diyAudio Member Join Date: Apr 2008	the cone still moves though its very slow and sticky, there eltax monitor III bookshelfs.

2nd July 2008, 07:30 PM	#5
Iain McNeill diyAudio Moderator Emeritus Join Date: Oct 2007 Location: Santa Cruz, California	not good The voice coil has probably exploded and unwound itself inside the magnet. I assume you've checked out this quick google search http://www.eltaxserviceshop.com/prod...5&sub=0&page=2 33euros could be worse! Not sure you'll find a recone kit for these