Ok, cancelled those foam surrounds, will send them back on Monday. Ordered some black silicone gasket instead.
Tried to buy it in some local stores at first, but nobody even knew what I was talking about. So this American bookstore 'a????n' should ship it soon.
By the way: having a look inside my Tannoys made me think ... and work. I'll show you in a new thread.
Tried to buy it in some local stores at first, but nobody even knew what I was talking about. So this American bookstore 'a????n' should ship it soon.
By the way: having a look inside my Tannoys made me think ... and work. I'll show you in a new thread.
Attachments
For reference: the product I ordered is 'Mannol 9912 Gasket Maker black'.
Ok, I started with a little experiment, just to get used to handling the product. Produced a 'simulated' surround cut, which I then tried to fix.
My simulated cut was much wider than the original one in the speaker, on the other hand, the speaker surround is much more flexible than my experimental foil.
It turned out that I would have to work really fast. After a minute or two the 'gasket maker' began to dry on its surface, while still smelling. On a soft surface, the sealant isn't easy to handle, this will be even harder on the speaker itself.
After about two hours I could hardly smell the solvent anymore, I have to say: it was a warm summer day with inside temperature well above 20 deg Celsius.
After drying over night, there was no smell anymore, the sealant had stayed perfectly flexible, and I really had to work a bit with my fingers to peel the sealant off the foil. Seems to work!
Ok, I started with a little experiment, just to get used to handling the product. Produced a 'simulated' surround cut, which I then tried to fix.
My simulated cut was much wider than the original one in the speaker, on the other hand, the speaker surround is much more flexible than my experimental foil.
It turned out that I would have to work really fast. After a minute or two the 'gasket maker' began to dry on its surface, while still smelling. On a soft surface, the sealant isn't easy to handle, this will be even harder on the speaker itself.
After about two hours I could hardly smell the solvent anymore, I have to say: it was a warm summer day with inside temperature well above 20 deg Celsius.
After drying over night, there was no smell anymore, the sealant had stayed perfectly flexible, and I really had to work a bit with my fingers to peel the sealant off the foil. Seems to work!
Attachments
It wasn't really simple to apply the sealant on that soft surround, and the high flexibility of the surround prevented me from creating a really sleek surface. Well, the speakers usually are hidden behind the black grills, so form follows function, again!
Applying it from the backside - which was my plan - did not work out, because I had no backside access to the surround because of the geometry of the chassis.
After drying over night, all seemed ok. No smell, and carefully moving the cone forced no damage.
Now, after several days of test use, everything is still ok and I'm really satisfied with the result. The surface of the sealant might be a little nicer in the end, but this was really hard to achieve.
Thanks for all your support!
Applying it from the backside - which was my plan - did not work out, because I had no backside access to the surround because of the geometry of the chassis.
After drying over night, all seemed ok. No smell, and carefully moving the cone forced no damage.
Now, after several days of test use, everything is still ok and I'm really satisfied with the result. The surface of the sealant might be a little nicer in the end, but this was really hard to achieve.
Thanks for all your support!
Attachments
Thanks for showing the results!
I built a pair of MTM "Natalie P"s (design by Evil Twin on htguide.com) over a decade ago but two of the four RS180S-8 woofers have got small tears in the surrounds over the years.
Maybe your gasket maker stuff there could rescue them
BTW, I have found that tool under the name "Helping Hand" at Farnell and like it for some work. It can be helpful to add shrink tubing over the crocodile clip jaws if using them for soldering cables and wires. This tool is also useful to hold oscilloscope probes in place when probing boards when you find that the official tool is crazy expensive...
I built a pair of MTM "Natalie P"s (design by Evil Twin on htguide.com) over a decade ago but two of the four RS180S-8 woofers have got small tears in the surrounds over the years.
Maybe your gasket maker stuff there could rescue them
BTW, I have found that tool under the name "Helping Hand" at Farnell and like it for some work. It can be helpful to add shrink tubing over the crocodile clip jaws if using them for soldering cables and wires. This tool is also useful to hold oscilloscope probes in place when probing boards when you find that the official tool is crazy expensive...
Ahh - as audiophiles or at least HiFi-maniacs aren't we used to small stuff that's wickedly expensive ... ?
Well, no, I'm not! So I'm with you on that!
Thanks for the update!
The Granville gasket replacement/windscreen sealant I recommended earlier may be less viscous and hence easier to work with. In common with all sealants, it must be smoothed quickly and in a single pass. As you have found, this is very difficult to do on a yielding surface!
However, remaining bonded to the original surround and remaining flexible are the major mechanical requirements in this case, and you have adequately demonstrated that your choice of sealant satisfies those requirements.
Looks like your repair will stand the test of time!
The Granville gasket replacement/windscreen sealant I recommended earlier may be less viscous and hence easier to work with. In common with all sealants, it must be smoothed quickly and in a single pass. As you have found, this is very difficult to do on a yielding surface!
However, remaining bonded to the original surround and remaining flexible are the major mechanical requirements in this case, and you have adequately demonstrated that your choice of sealant satisfies those requirements.
Looks like your repair will stand the test of time!
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Thanks again for your hint! But unfortunately I cannot recommend buying surrounds from this guy. Communication with him suggests the assumption that he does not care about the material of the surrounds needed. He just sends out foam all the time.
After returning the kit to him, he blamed me for 'ordering wrong'.
I had to send a second, more sharply-worded reminder to finally receive a refund.
Well, I did not order 'rubber', I just ordered 'surrounds for Tannoy D500'.
I just thought he as a specialist should either know what's required in that case or just ask. I would have told him.
As you can see here, he offers that same kit now 'for Tannoy D500' without stating the fact that these are foam surrounds.
This is not what I consider an honest and precise item description, made by a professional, or an assumed professional.
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