Hi all, I have mentioned this in passing on other threads, but thought I would start a thread and see if anyone else is interested.
I have (like many here) a few pairs of speakers.
Mine are mostly 1990s, and one pair from 1970s.
They all, to some extent or another, change their sound dependent on the relative humidity (it might be proportional to absolute rather than relative but difficult to tell the difference).
Best sound seems to be at 45% RH or lower (though it rarely goes below 45 here and usually stays above 50%).
Mechanism seems obvious to me: the more paper and wood involved in the design, and the cheaper the wood and paper involved, the less stable it would probably be.
My “best” speakers are little affected and sound great pretty much all the time (very dense cabinets and all 3 drivers in it are non-paper).
The rest are
paper cone / fabric dome (affected noticeably)
paper cone / Mylar™ dome (affected a bit)
(both the above with fairly decent MDF cabinets)
and finally my 1970s speakers - 3 drivers all paper (12, 8, and 4 inches respectively), and “chipboard” cabinets from 1970.
Affected quite a bit, but less easy to tell at the top end given it’s a 4 inch paper cone tweeter.
And any comment from PSA (@Chris_Brunhaver ) on PSA speakers and testing - any tests done on humidity changes, in the industry more widely or PSA in particular.
It is possible I am alone in my thoughts on this, also possibly I have just invented a new line of “audiophile” humidifiers / dehumidifiers for folks to worry about
(recall we don’t have air-con routinely in the UK and where it does exist (typically in office buildings and the like) it can be pretty awful - overly dry, laden with bacteria, low performance etc. etc.)