In message , tony sayer
writes
In article , Derrick Fawsitt
writes
In message , Don Pearce
writes
On Sat, 2 Sep 2006 15:04:27 +0100, Derrick Fawsitt
wrote:

I have just acquired a pair of Quad 989 ESL speakers and am delighted
with them. I have however reported to Quad that there is a slight
"fizzing" noise emanating from one of them. You have to put your ear
close to it to actually hear it. It started to occur during the
extremely hot weather we had recently here in the UK and Quad said they
were inundated with calls about other users experiencing the same
problem and that it might be due to the high humidity. However, it has
persisted up to now despite the cooler weather and yet I am reluctant to
have to haul my spanking new speaker into my car to bring it to Quad
over what appears to be a minor problem, or is it? How should I regard
this, is it serious or potentially serious and what action should I take
in the matter. The speakers are not easy to transport and I am reluctant
to stand them up, (in case they fall), or lay them down on account of
the "stress" it might put on the panel in relation to its base.
What to do please, I would be so grateful for help and information.

The two usual causes are moisture and dust. You appear to have
eliminated the first, so maybe it is the second. Can you localize
where it is happening by listening, or is it just coming off the
diaphragm as if it were a signal? If the latter, it will be happening
in the power supply.
I can source it by putting my ear to the panel about one third down from
the top. It is not too noticeable when playing music, its only when I go
to switch them off that I notice it. I hate the thought of loading it up
in the car but needs must.
Thanks so much Don.

Ah!, one of the few tribulations of the ESL owner

One of mine is doing this at the moment, and its due to both damp and
high humidity and though its not really been *that cold or humid
recently I've noticed some days the heating started to come on which is
normally set to 21 deg C in our gaff.

Good to get some consolation Tony, what particularly worried me about
your answer was that only one of mine is doing it, that is until I
re-read your post and saw that the same is happening to you. Can't
understand it as the room is a dedicated one and nearly always over
20deg C. Also there is little or no dust, at least I have not seen a lot
present.

They are still under warranty, the question is, do I get back to them
and have the trouble of loading the speaker in my car for a drive or do
I just expect to live with it. In other words, when is a fizz serious
and when is it not.
--
Derrick Fawsitt