The message
from "Bryan Wallwork" contains these words:


Brian

its not foil, it is or was a rather rigid (relative term) plastic. Sucking
works on these types, usually.
If you are concerned, then replace with cheap Audax soft dome units, much
better sound, IMHO.
I had a few pairs of T27's, but replaced them with Celestion HF1300 / STC
4001 units, but I still like the Audax units, mounted in polystyrene
spheres.
cheers
Bryan

I take it that you mean replace the whole of the T27s with Audax units?

For a moment I wondered whether you had found a way of replacing just
the dome sections with an Audax replacement?

David