Question about JVC TH-M505 System

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Speaker disassembly The magnet and speaker cone are moving inside housing, How can I seperate the housing to stablize the speaker cone?

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  • Billy1135 Mar 05, 2008

    The housing is the problem, how does the screen remove from the housing without damaging, the cone is not damaged, and what I mean by stabalizing the speaker is the cone and magnet which are one are fdlopping around inside the housing and it seems that the bracket which stabalizes it has broken,

  • Billy1135 Mar 06, 2008

    Unfortunately there are no screws, but I will guess that you are correct on the glue issue, thanks very much for your help

    Bill

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2 Answers

I'm going to try to heat it a little with a blow dryer to loosen the glue a little then pry, thanks for your suggestions again

Posted on Mar 06, 2008

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  • 61 Answers

Is the cone damaged..you cannot seperate the cone from the magent without damaging the speaker..what do you mean by stabilize the speaker cone ?

Posted on Mar 05, 2008

  • Sid B
    Sid B Mar 06, 2008

    that whould genererally pull right off ..they are just tabbed in..however in some speakers they are glued so it would not be possible to open the screen without damaging it. Also look at the back of the the speaker box..look for screws...if there are screws then you can safely disassembele the box and put it back together when you are done

  • Sid B
    Sid B Mar 06, 2008

    try to pry it open with the head of a very flat screw driver...very slowly

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Posted on Jan 02, 2017

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1 Answer

How to disassemble


Most speaker enclosure's, both wood composition and metal are hermetically sealed. This prevents damage to integral parts or moisture buildup. When a small speaker is malfunctioning, the magnet or cone may have sustained damage and is no longer viable. It is better to replace the entire unit than try to repair the interlace works.

Apr 17, 2015 | Brookstone Mobile Mini Speaker

1 Answer

Why is my speaker no playing, some sound but no bass?


Assuming that it is a large speaker with a large magnet on the back, and it has a large cone that was designed to play 'bass', if it has been dropped (or, for example was transported in a vehicle that went over a big bump - particularly with the speaker sitting perpendicular to the floor of the car/truck), the pole piece (magnet) in the very center shifts and pinches the coil between the outer magnet and the pole piece. This stops the coil from moving in and out through the magnetic field. Because high frequencies do not require much motion of the coil within the magnetic field, if the coil itself did not get broken in the process, higher frequencies (treble) will be reproduced (however poorly), but you'll get zero low frequencies (bass). This COULD be fixable, but a speaker repair specialist with a suitable demagnetizer would be needed to reposition the pole piece, and then, the whole cone would probably need to be replaced, as well. Depending upon whether it is an expensive (JBL/EV?) or a cheap speaker, it may be cheaper just to replace it.

May 10, 2014 | Audio Players & Recorders

1 Answer

One of my Bose 601 speakers has developed a mid freq buzzing at volume. Ant ideas?


Yep, if it is a scratchy sort of sound, the units coil has overheated, the voice coils insulation has bubbled and expanded, and is now rubbing against the magnet as it moves. Only fix is to replace the driver. U can confirm by moving the inner circle of the cone in and out of the magnet. Should not rub and be perfectly centered around the magnet.

A vibration sort of sound can be caused by loose screws holding down the driver. But that is usually the case on your large heavy drivers with large excursions, not a mid range speaker.

Mar 15, 2014 | Bose 601 Main / Stereo Speaker

2 Answers

One speaker no sound


I just want to confirm that the solution on another page from francis 8 works perfectly ( http://www.fixya.com/support/t3709832-speakers_stopped_working_cannot ). We have two sets of Creatures in our offices, one had been shelved (by someone less persevering than me) due to this problem years ago and my set started this trouble a few days ago. Troubleshot everything, every cable, setting, combination, spare speakers etc - nothing worked. Opening the offending speaker and pulling back the metal weight behind the speaker cone was the solution for BOTH of our units.
Big smiles all around :-)
Note - When you've opened the plastic shell and loosened the speaker from its mounting, the the big round metal piece/magnet sits within the actual speaker 'cage', slightly behind the speaker cone. It's tight but movable and can be pulled all the way back as far as it can go inside it's housing, away from the speaker cone.
Not sure why it gets pulled forward, but it isn't fixed in position and so could clearly get bumped by dropping the speaker or a reasonable impact of some sort. Once bumped forward it would severely limit cone movement and therefore volume.

May 07, 2010 | JBL CREATURE II Computer Speakers

2 Answers

How do u disassemble the jl 12w7, the cone is stuck


if the cone is stuck, it is possible because the voice coil over-heated. There is really no way to disassemble the speaker without re-coning it. The thing you can do is manipulate the cone with your fingers gently, and it might release. Be careful. hope this helps.

Mar 27, 2010 | Jl Audio 12W7 Car Subwoofer

1 Answer

Scratchy sound from one hifi speaker


Determine if the noise is only from one driver. If it is gently press all over with your fingers on the cone, so it moves up and down. If it makes the noise then then the cone is catching inside the housing. You will need a new unit if that is the case.
Before you do any of the above swap the speaker with another so you know it's not the amp causing the noise.
If the whole speaker makes the noise and it's not the amp, then it will be a fault on the crossover inside the speaker.

Feb 10, 2010 | Tannoy Mercury MX4-M Main / Stereo Speaker

1 Answer

My basslink worked great, son blew fuse, replaced, now sounds lik


If the speaker has been overdriven, it may have damaged the cone surround or damaged the speaker coil, causing it to 'rub' inside the magnet. To check for rubbing, you need to move the speaker cone backwards and forwards by hand and listen where the speaker coil/cone goes into the magnet. It should be silent if ok. If you can heara rubbing or grating noise, then the speaker is damaged. If the output driver on the amp is damaged it can give a distorted sound, which could easily happen if it tries to provide too much current.

Nov 04, 2009 | Infinity BassLink II Car Subwoofer

1 Answer

I have new 10 inch subwoofers and they sound great but there is a rattling problem and i am not sure how to fix it....


try pulling the speaker out of the box and inspect the wire connection behind it. If that is good then look at the cone to see if it is seperated from the magnet. If so you can get a recone kit from any local audio store

Nov 02, 2009 | Car Audio & Video

1 Answer

Used to have this


a microphone and a speaker work off the same principles. there is a magnet and a coil. when you speak,the air makes the speaker cone move and the coil produces a signal because it is moving across a magnetic field. when you apply a alternating voltage to the coil,it moves in opposite direction to the magnet because likes repel and opposites attract. if you apply dc to a speaker it will stay in or out depending on polarity.a bass guitars lowest not is about 50hz or cycles per second.the signal is going plus minus 50 times per second and that is why a speaker moves.because of the size of large cones,they can not move so fast,that is why woofers are big to move lots of air,and tweeters are 1 inch or so,because the range is 20khz or 20000 cycles per second.beacuse microphones have to be very sensitive,the voice coil and structure are extremely small and light.a microphone will produce sound with a signal applied,but burn out with very little power.even a clock radio will blow it out.

Jun 12, 2009 | Microsoft LifeChat Stereo Headset with...

1 Answer

The magnets came lose is there a repair place that can realign and attach my magnets


flip the speaker upside down n it should b a hole thats where the screw is a woffer is nothig but a cone n a magnet

Jun 01, 2009 | Kicker CompVX CVX104 Subwoofer - 10" Dual...

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