Location: Middlesex, UK
Posts: 4,482
I'm Alex.
Location: Near Saffron Walden, Essex
Posts: 7,090
I'm Dave.
I had one of the first pairs to be fitted with the Coles and the bass driver sagged after 18 months or so. The replacement and the other one sagged some time after. I only had them for five years in total.
Location: Northampton
Posts: 1,373
I'm Mark.
My Dm2's haven't sagged. Sound lovely too.
Mark
Location: Middlesex, UK
Posts: 4,482
I'm Alex.
I suspect that it is a matter of temperature, UV exposure, humidity, manufacturing variations, and luck! etc. etc.
I have quite a few white surround BC1 bass /mids that are still usable. In fact, I think all are. Probably three pairs of white surround BC1's.
Spendorman
Location: Middlesex, UK
Posts: 4,482
I'm Alex.
Different type of surround, more rubber like, only way I got a DM2 bass unit to sag was when I accidentally trod on the cone of one when the unit was on the floor. It did damage the voice coil former though.
Managed to take unit apart straighten out former and speaker works.
Spendorman
Location: Near Saffron Walden, Essex
Posts: 7,090
I'm Dave.
Speak for yerself, mine's taut and perky..
Location: Witney Oxon
Posts: 893
I'm Martyn.
My early BC1s ( Serial Nos. 6703/04 ) had white roll surrounds which were affected by the hot summer of ‘76.
Later in the year Spendor fitted replacement drivers with black surrounds.
Years later one of those started fouling and I inverted the driver to solve the problem.
The BC1s were later sold, for personal reasons.
Sometime later a pair came up for sale with one non-working bass/mid. driver.
I took a chance and bought them. It was a fractured braid to the voice coil which was reasonably easily repaired.
This pair has Serial Nos. 10203/4, so are a fair bit younger than my original pair.
I know aural memory can be suspect, but this later pair do sound better than the original BC1s.
In fact, I will never change them.
They have a certain ‘way’ with the type of music I play and no comparable speakers I’ve tried betters them...