Archived from groups: rec.audio.tech (
More info?)
Dave Platt wrote:
> In article <9ocge.17929$RG2.5356@bignews5.bellsouth.net>,
> jakdedert <jdedert@bellsouth.net> wrote:
>
>
>>>If I put them in the attic. It gets hot up there in the summer and
>>>cold in the winter. Will this damage the drivers, therefore, should
>>>I try to find some room in the house that is air conditioned and
>>>heated or it doesn't really matter?
>>
>>If they have foam surrounds on the drivers, there's little you can do to
>>keep them pristine. They're gonna rot.
>
>
> I read an interesting report, a few years ago. It's not something
> I've followed up on myself, and so I can't swear to its correctness or
> to the safety of what was proposed. Use the following at your own risk.
>
> Anyhow: what the report said, is that the cause of foam-surround rot
> can, in some cases, be just that: rotting, in the biological sense.
> It seems that the gas-expanded plastic foam used in these surrounds
> can be attacked by certain species of fungus, which literally digest
> it over a period of years. Humidity and heat speeds the decay.
>
> The report stated that treating one speakers' surrounds with a
> fungicide (athlete's foot powder, active ingredient not mentioned) seems
> to have greatly extended the lifetime of one set of surrounds.
>
> The foam is also vulnerable to UV, and I suspect to ozone as well. I
> have little doubt that any foam-surround speaker will fail,
> eventually, due to one or another form of deterioration of the surround.
>
The focals are rubber surrounds BUT I am using a pair of Green Mountain
Audio Europa that are foam and I don't see the harm in brushing on some
dr scholls so I'll do that tonight thanks for the tip. As for the
rubber surround focals for a future project I guess then that heat won't
really do much to them except maybe make the spider brittle if I leave
them several years so one summer won't be bad. Thanks.