In message , Keith G
writes

"Mike Coatham" wrote


1" voice coil, 13,000 Gauss field strength. Total Flux 54,000 Maxwells
(In old pre-SI units)

I've probably got the Fs frequency somewhere.
--
Chris Morriss

That's interesting 'cos the 1971 HiFi Yearbook has them listed as 1"
Voice
Coil(Aluminium) , Gap Flux 14,500 Gauss. Total Flux 60,000 Maxwells. Paper
cone with double diaphragm. H.C. 6 watts RMS 12W Peak. FR 40-20,000Hz.



This discrepancy is a good example of why a lot of us here pay little (or
no) attention to some of the crap spouted on this group by some of the
self-styled 'experts'** here.

(Lest they might feel included in the above statement, let me state clearly
that I've never yet had any reason to doubt factual information supplied by
either Stewart P or Jim LS on this group.....)



** where X is the Unknown Quantity and a 'spurt' is a drip under
pressure......







Well I could scan the text from the old Gilbert Briggs book but as it's
you Keith I won't bother

All the Wharfedale drive units, (like the Goodmans Axiom 301s and Audiom
61s that I like so much) were made in a number of variations.

Don't forget that the Super 8 was mentioned in Gilbert Briggs 1952 book
'Sound Reproduction' so the design was around for a long time!
--
Chris Morriss