Can you smell your speakers when youre rockin out?

At what point did I say that time coherence was necessary for great sound? My point is that time coherent designs can, and have sounded great. It is only one of many design decisions that any builder decides upon at the very beginning. Great sound is produced using many different design decisions. Dismissing all designs of one type because you didn't like one example is foolishness.  

After many decades as a professional musician and more recent decades as a paid (overpaid usually) live sound mixer…plus decades as an audio geekster (man…I'm OLD), I've narrowed my speaker preferences down to these: The ones that sound great to my ears. I find that using my ears instead of those attached to the heads of other people work much better in terms of actually hearing things that I might like. 

Kenji,
How dare you tell people what I think, especially of other designers! I agree and admire what countless designers, past and present, have accomplished. Indeed, many ideas of others and the research of others have triggered my own. This is reflected on my website, under the History of Loudspeakers- a long list of what anyone would consider important developments in speaker design.

I agree with wolf and others here that fiberglass, especially acoustic fiberglass (which is bonded) is not a health hazard. IF IT WERE, then our EPA would have banned it, as they did asbestos. You may not know this since you are in England. And fiberglass is not banned in the UK or EU if you’d done a search.

In answer to the original poster’s question, in my experience as a manufacturer, I agree with others that the two most likely culprits for this odor are the residual fumes inside from a varnish or other wood-finish overspray. This should go away after several months. The other cause could be from voice coil heat causing outgassing of the adhesives used on the voice-coil wires and perhaps the plastic voice coil former itself, on which the wires are wound (if it is not an aluminum former). Sufficient heat is generated when playing rock music at REALLY LOUD levels, and that means using at least a 75W amp on 90dB speakers, to a 250W amp on insensitive speakers. It cannot be the fiberglass inside the cabinet, because that has very little odor even when new, and because the ambient temp inside any home speaker’s cabinet is never high unless it’s sitting in full sun all day.

Wolf, I have to say that I always enjoy your sense of humor.