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Can I replace the dust cap of a Markaudio alpair 10p?
Can I replace the dust cap of a Markaudio alpair 10p?
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Old 1st December 2017, 05:57 PM   #1
Lico is offline Lico  United States
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Default Can I replace the dust cap of a Markaudio alpair 10p?

So I was thinking this morning that my speakers sounded a bit strange and upon inspection it seems a little kid has pushed in my dustcaps. Has anybody repaired paper alpairs?
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Old 1st December 2017, 06:53 PM   #2
chris661 is offline chris661  United Kingdom
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Being the paper version, you might find you can pull the dustcap back into shape with some sticky tape, or poking the blunt end of a pencil through if the polepiece is vented.

You can also do it really carefully with a vacuum cleaner, or a needle with the point bent into a slight hook.

Just a couple of ideas. Try them at your own risk.

Chris
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Old 1st December 2017, 08:28 PM   #3
chromenuts is offline chromenuts  United States
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Had this happen on a Eminence Alpha 15a. Only way I could get it back out was a vacuum...actually it took a pretty powerful shop vac for that driver. It was kind of dramatic, but it worked great and the speaker looked like new afterwards.

This is what I did...TRY AT YOUR SPEAKER'S OWN RISK.

If you try it, make sure you place the nozzle in contact with the dust cap dome BEFORE starting the vacuum.

Hopefully the nozzle you have is about the same size, or you should have a reducer or something to match the dust cap size.

Once the nozzle is seated in place against the dust cap as evenly as possible you can turn the vacuum on, or even better have someone assist you so you can hold the nozzle perfectly steady with two hands.

Do NOT pull on the suction nozzle of the vacuum when it is running. Let the vacuum completely cycle off before pulling the nozzle away so you don't over extend the speaker's suspension.

You may only have to flick the vacuum on and off very quickly for a more delicate speaker.

Obviously, this is just one option as was stated previously. I tried the tape method and it didn't accomplish anything except starting to tear at the fibers of the paper the cap was made of.

Good luck
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Old 2nd December 2017, 01:26 AM   #4
planet10 is offline planet10  Canada
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Can I replace the dust cap of a Markaudio alpair 10p?
Pictures?

Pulling a pushed dustcap out almost always leaves it wrinkled and not at its best. If you can get it close — i recommend the pointy metal stick method — it will need reinforcement. I have done this using PVA based ModPodge (mind you only on the flimsier Fostex FE dustcaps, i’ve never damaged a Mark Audio dustcap just cones).

You could also try this trick — admittedly for Fostex FE, but i suggested it to a fellow in Sweden for his A7.3 (no word back, he did buy a set of A7.3eN): FE12x dustcap fix

dave
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Old 5th December 2017, 05:49 PM   #5
Anders59 is offline Anders59  Sweden
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Default A7.3 in Sweden as Dave wrote about

Hi there, here comes some pictures and I just want to show my A7.3 with pushed in dustcaps. My grindchild 3 years old watched TV and suddenly the music stopped, so she pushed the "Button" several times on both drivers.....

I have tried Daves tips but the center cap is so stiff, escpecially when its already wrinkled. I think that it will cause more damage to fix it. Paper may work but metal is not easy to model in the way you want. Anyway I have a pair of Daves A7.3eN for my FH3s. Soundwise the old drivers are not so bad, but it will take a while for me to fix speaker covers.

Anders
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Old 5th December 2017, 08:53 PM   #6
planet10 is offline planet10  Canada
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Can I replace the dust cap of a Markaudio alpair 10p?
Anders,

If that trick did not work, then time for them to come off. Then build some phase plugs for them… even if just a felt plug.

dave
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Old 6th December 2017, 07:03 PM   #7
Anders59 is offline Anders59  Sweden
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Thanks Dave, great idea. Ill make som surgery and add a pair of black phase plugs.

Anders
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Old 6th December 2017, 10:27 PM   #8
5th element is online now 5th element  United Kingdom
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Quote:
Originally Posted by planet10 View Post
Anders,

If that trick did not work, then time for them to come off. Then build some phase plugs for them even if just a felt plug.

dave
Quote:
Originally Posted by Anders59 View Post
Thanks Dave, great idea. Ill make som surgery and add a pair of black phase plugs.

Anders
Wait a second. I thought Mark had said that the dustcaps, on his metal coned drivers, are responsible for helping give them their high frequency extension?
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Old 6th December 2017, 11:00 PM   #9
planet10 is offline planet10  Canada
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Can I replace the dust cap of a Markaudio alpair 10p?
They do, but once crushed they get in the way. After losing the dustcap one might find the need for a tweeter, but maybe not — i have never had to do it on an MA driver.

dave
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