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Old 16th March 2013, 09:45 PM   #71
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The silicone is actually fairly soft unless you get it really thick.

I used it to repair a surround on one of my 12's and it work great.

It is a lot softer than the standard bathroom/kitchen stuff.

Use a very thin bead, it seems to have the consistency after it cures similar to some dome tweeter and midrange surrounds that I have seen.

I was thinking it might be worth while to use a thin card of some sorts the clean out any bad foam along the gap.

The old deteriorated foam stuff might cause it not to flow into the gap and bond properly.

jer

Last edited by geraldfryjr; 16th March 2013 at 09:50 PM.
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Old 17th March 2013, 09:03 PM   #72
taotao is offline taotao  Germany
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I don't think it's necessary to remove the old foam.
Silicone sticks like hell to nearly everything and it flows in every tiny gap (even into the foam, because the foam, that is used here, has an open cellular structure).

Anyway the result counts, buzz gone --> happy listener
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Old 17th March 2013, 09:26 PM   #73
tyu is offline tyu  United States
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Thanks For all your info....
Not all can do this...to old... Cant move the speakers around..well kill the driver right when there almost done...it gos on an on... but if the buzz is bad a nuf...
What dose one have to lose.....
Thats Why i have My Apogee Stages ....Acoustats ESL.... ML...
In wateing...Long Live Acoustats
Good Luck
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Old 20th March 2013, 04:29 PM   #74
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Now if only someone would start making bass ribbons for Apogee's locally.

Hi Davey, did you ever have a set of Diva's? Al
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Old 20th March 2013, 05:11 PM   #75
Davey is offline Davey  United States
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Quote:
Originally Posted by DeltaStar View Post
Now if only someone would start making bass ribbons for Apogee's locally.

Hi Davey, did you ever have a set of Diva's? Al
Nope. I've owned only Duetta's but have listened to Diva's, Scintilla's, Stage's and a couple of the hybrid models.

The business model that 'Graz' has adopted is not sustainable over the long run. Eventually someone here in North America with the capabilities to fabricate woofer ribbons will provide a solution for capable DIY'ers who are on a budget.

Cheers,

Dave.
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Old 20th March 2013, 05:31 PM   #76
john65b is offline john65b  United States
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Davey, how did the Duettas rank amoung the other apogees?

I will be working on "the injectable buzz fix" later next week (going skiing this weekend), and have a few "Big Ideas" I wanna try with the silicone...
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Old 20th March 2013, 05:46 PM   #77
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Hi John65b, My 2cents worth, I have all the models but the Full range and the hybrids, I would give the 1 ohm Scintilla's top spot at this time over the rest, The Diva's seem to be a bit thin sounding on the mid ribbons, but that could be due to my amps and the passive setup, However I do have a set of Grazed Diva's, all new ribbons that I will set up soon when I get my Carver silver sevens back from repair. The Duetta sigs would be a very very close second
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Old 20th March 2013, 06:12 PM   #78
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I had many buzz problems with my Duettas.
They were coming fron the cover and the main frame. May be that could be a good place to start with, before injecting stuff around the ribbons.
Have you investigated this possibility?
What I do is use a variable signal generator, I start at low frequency and slowly move up. When I ear a buzz, (resonnant frequency) I stop and press with my hands all around the cover to see if I can eliminate or reduce it.
Then, I fixed the problem using shingle or a short wood screw, placed where the problem is corrected.
There could be a few more resonnant frequencies as we move up in frequencies. In this case I start with the loudess vibration and when corected I do the same treatment to the remaining buzz. Normaly working on the stronger vibration will have an effect on others as well. If this solution has some effect on the buzz, this means that the problem does not lie with the foam, but some mechanical vibration in the casing.
I am folowing your work with great interest since I don't know when the time could come I may need to do what is suggested on the thread.
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Old 20th March 2013, 06:32 PM   #79
john65b is offline john65b  United States
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I have the covers completely off and I have the buzz on my DS. Only really noticeable at high volumes between 150hz and 300hz.

I have thought of using a DCX2496 and a Fostex 4" driver at those buzz frequencies, eliminating them from the DS altogether, but would rather have a complete fix...
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Old 20th March 2013, 06:58 PM   #80
tyu is offline tyu  United States
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John if your are not runing the Duetta with the DCX2496...that would pullout most of the buzz....maybe... i have had 6 pr of Apogees... but never went {Full} active...that way you could get higher output befor the buzz...i would think...I have ran the Krell KBX crossover in the 90s on B&Ws...An to pull the bass out of the Apogees...still used the stock crossovers in the Duettas...
Active i could get a lot more output... an cant even see the driver move.
I would like to see you cover all bases befor you go down what may be the only path.....
the sound of these Apogees is one of a kind sound....but dont wont you to get turn off if all dose not go well....But that just ME....Have fun ...good luck

Last edited by tyu; 20th March 2013 at 07:03 PM.
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