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-   -   Mission 701 baffle rattle, help me fix that (http://www.diyaudio.com/forums/multi-way/223649-mission-701-baffle-rattle-help-me-fix.html)

misfits73 15th November 2012 06:20 PM

Mission 701 baffle rattle, help me fix that
 
Hi guys,

help me fix the baffle rattle in my Missions 701, it is very annoying in low frequencies.
I'm thinking of buying a new pair of speakers cos of that but i don't think i will ever get the Mission's sound with my budget (max 150).
I have read about re-glue ing, but i dont know how to remove the front cover (baffle), which strong glue to buy and in which points to apply it.

Please help otherwise advise for speakers with such sound for 80's Heavy metal and rock,pure analogue sound thru the grooves

mondogenerator 15th November 2012 07:09 PM

im loosely familiar with those speakers, but not an expert. If the baffle is screwed down then try removing it and sealing with bathroom silicone, or self adhesive foam draughtproofing tape, and put it back together. It may be a speaker itself buzzing tho if they have been pushed very loud. Perhaps System7 will chime in when he sees this thread, he has an interest in speakers of that era, and likely knows your model far better than me.

It could be the grille frame, terminal plate, or crossover inside the box vibrating. Or it could be a issue with the woofer. Are you sure its the baffle?

Cal Weldon 15th November 2012 10:07 PM

The grilles appear removable on the pics on the net. Do yours look like these?

https://www.google.ca/search?q=missi...E4eniAL22YCIBA

misfits73 15th November 2012 10:51 PM

Quote:

Originally Posted by Cal Weldon (Post 3243144)
The grilles appear removable on the pics on the net. Do yours look like these?

https://www.google.ca/search?q=missi...E4eniAL22YCIBA

Yes,that's it

Cal Weldon 16th November 2012 02:43 PM

So if you can remove the grilles, can you not sort out where the buzz is?

davidsrsb 17th November 2012 09:51 AM

Check the driver bolts are tight - they can shake loose with age.
One of my Mission 752s was rattling, which turned out to be the glued joint on the side of the baffle. The glue seems to have vanished in my hot climate, so I opened up the gap and forced in epoxy resin

misfits73 17th November 2012 03:26 PM

Bolts are tight, the problem is the original water glue.
I dont know if i have to remove the front black cover(is that cover called baffle?) or apply glue from the inside (without removing the cover,only the drives)
Any particular glue to suggest?

Pompey Monkey 17th November 2012 04:16 PM

I have a pair of Mission 702e's - they are essentially the same, but with extended panels to make them into a faux floorstander - a bit of a con really as the actual enclosures are the same size as yours.

One of the baffles in mine also became loose and made a really irritating buzz whenever significant bass was present in the music. To fix them I had to gain as much access to the insides as possible by removing both the connection plate on the rear of the speaker and the woofer. I really can't remember if I disconnected the the crossover or not - if I did it couldn't have been that difficult or I'd remember!

I used plenty of Araldite around the rear edges of the baffle where it butts against the wood and also (carefully!) filled in as much as possible of the small gap between the baffle and cabinet from the front. It was a bit fiddly, but then some things are...

That was at least seven years ago and they are still going strong, with daily use. However, I have had a subwoofer as part of my set-up for the last five or so years and that has probably reduced some of the stresses on the baffle/cabinet interface.

Still - seven more years for the price of an epoxy resin set can't be all bad ;)

Please let me know how you get on.

system7 17th November 2012 09:13 PM

Araldite sounds a bit over the top if that is epoxy resin...:D

PVA wood adhesive is the stuff for sticking any sort of wooden material.

Evo Stik Wood Adhesive Interior 125ml:
Evo Stik Wood Adhesive Interior 125ml, 0000050403226

Pompey Monkey 17th November 2012 10:33 PM

Quote:

Originally Posted by system7 (Post 3245498)
Araldite sounds a bit over the top if that is epoxy resin...:D

PVA wood adhesive is the stuff for sticking any sort of wooden material.

Evo Stik Wood Adhesive Interior 125ml:
Evo Stik Wood Adhesive Interior 125ml, 0000050403226

Except the baffle is plastic and the cabinet is mdf....

I've repaired one of these so experience (probably) trumps guesswork....


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