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I need some advice regarding damaged Dynaudio D28/2 domes. I left the grills off one day and came home to find them caved in. It doesn't matter who did what because I have two young kids and I can't blame them; I can only blame myself. Ever since this happened I have noticed that things were amiss. Lack of dynamics, air, loss of definition from top to bottom etc.
The first thing I need to know is if I can replace just the soft domes without replacing the complete drive units. I have not taken them apart yet to see if this is possible and am reluctant to do so at this point. Replacing the domes would be great because otherwise I have to send them back at great expense for manufacturer replacement at $220 for a matched pair plus over a $100 for shipping. I'll do it without hesitation but if I have another option I'd be relieved.
If I can replace the domes, where can a person get the necessary parts?
If the domes can not be replaced then I'll send them in rather than putting in new drives myself because they have been modified by the designer and I don't think it would be advisable to try and copy whatever he did. Thanks in advance.
try using masking tape to pull the creases out or a vacuum cleaners tool suction. I have done this several times as a result of what had happen to you. It can take awhile and hopefully will get back to original shape.
Or the damaged part may be a dust cover - check with the manufacturer.
Good luck.
Jonce
I have pulled the dome back out using masking tape. I should have mentioned that. The damage is done and they do need to be replaced.
I spoke with Jud Barber about this and he said he has done strobe scopes on the domes of similiar tweets and noted the changes a dome takes in shape as its working. Once a dome is damaged it doens't take on the same shapes.
Thanks for all the ideas. I'll phone around and see if someone has the parts I require.
Mr. Barber is correct, once a soft dome has had it's "back broken", even if you pop it back soon, it will never be the same.
If you know what to look for, you can see the alteration in the FR, and it shows up on a waterfall plot readily. A quick pop-in, and then back out again may not do much, or it may be the one that does it in, it depends on how stiff the dome is. The Dynaudiko domes are quite stiff for soft domes, and I could see how they would suffer from being pushed in.
Really soft domes that don't get popped back out again right away, tend to take a distorted set, and even when popped out later, never seem to recover totally.
Jon Risch
JR,
The tweets were definetly damaged and did not sound right. You were also right about the tweets being modified by the designer and replacing them with stock would be useless. Someone suggested a dome replacement package but the designer suggested that there could be problems associated with fit etc and it would be best to replace them with his modified matched pairs. The tweets also have a custom gold plated template ring around them for dispersion. Part of the attraction for kiddies I guess. In this case, I had to much at stake not to follow his advice and just sent them off for the transplant operation. I'm also looking in to getting a plexiglass shield made just for added protection. This mistake is costing me over $300. There is a plus out of all this though; an upgrade to the crossover and port that I'll get done at the same time.
You can replace them yourself. You should take the tweeter out and then rmove the interior faceplate scres that release the faceplate. Then the dome/voice coil assembly will just lift out. You can also inpect the voice coil for damage and simply push the domes back into shape - they may work fine again. Parts for Dynaudio drivers are easy to find - you don't need to send your speakers anywhere (and they don't cost $220 pr). Good Luck!
absolutely right!
years ago, when I bought some D28af's, I seem to recall they were about $35.00 each. At the time, Audio Concepts and Madisound were carrying the Dynaudio driver line. They are a piece of cake to replace.
These ware stated to be modified domes, not stock. He may be able to replace them himself, IF the modifier did not eliminate the user replacable aspect via a portion of the mod. He certainly would not want to use stock diapragms.
Jon Risch
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