"Chris Morriss" wrote in message
...
In message ,
harrogate writes

"Chris Morriss" wrote in message
...
In message , Oddjob
writes
Hello all, I have a pair of loudspeakers in walnut cabinets.
I couldn't find the tweeter by feeling around the front - the grills
don't
come off.

I opened them to find wharfedale super 8 / RS / DD drivers inside. A
friend
has told me that they are 1970's with tweeters "built in" to the
woofer!

Can anybody shed anymore light on these speakers?
I don't think they can handle much power as they distort quite easily
:-(

Thanks



They are nice high-quality drive units from the 60s and early 70s.
They
are twin cone units. They roll off at 12kHz or so, so a
high-efficiency
tweeter might be useful.

You'll find quite a lot of info on the web about them.


--
Chris Morriss


Actually known as the Wharfedale Super 8 RSDD - for roll surround doped
(or
was it double) diaphragm.


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.

"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......

"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......

In message , Mike Coatham
writes

"Chris Morriss" wrote in message
...
In message ,
harrogate writes

"Chris Morriss" wrote in message
...
In message , Oddjob
writes
Hello all, I have a pair of loudspeakers in walnut cabinets.
I couldn't find the tweeter by feeling around the front - the grills
don't
come off.

I opened them to find wharfedale super 8 / RS / DD drivers inside. A
friend
has told me that they are 1970's with tweeters "built in" to the
woofer!

Can anybody shed anymore light on these speakers?
I don't think they can handle much power as they distort quite easily
:-(

Thanks



They are nice high-quality drive units from the 60s and early 70s.
They
are twin cone units. They roll off at 12kHz or so, so a
high-efficiency
tweeter might be useful.

You'll find quite a lot of info on the web about them.


--
Chris Morriss


Actually known as the Wharfedale Super 8 RSDD - for roll surround doped
(or
was it double) diaphragm.


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.



I got my data from an article by Gilbert Briggs. (Founder of
Wharfedale). They made them with both copper and aluminium voice coils.
The magnet might have been stronger in the later (1970s) ones.
--
Chris Morriss

In message , Mike Coatham
writes

"Chris Morriss" wrote in message
...
In message ,
harrogate writes

"Chris Morriss" wrote in message
...
In message , Oddjob
writes
Hello all, I have a pair of loudspeakers in walnut cabinets.
I couldn't find the tweeter by feeling around the front - the grills
don't
come off.

I opened them to find wharfedale super 8 / RS / DD drivers inside. A
friend
has told me that they are 1970's with tweeters "built in" to the
woofer!

Can anybody shed anymore light on these speakers?
I don't think they can handle much power as they distort quite easily
:-(

Thanks



They are nice high-quality drive units from the 60s and early 70s.
They
are twin cone units. They roll off at 12kHz or so, so a
high-efficiency
tweeter might be useful.

You'll find quite a lot of info on the web about them.


--
Chris Morriss


Actually known as the Wharfedale Super 8 RSDD - for roll surround doped
(or
was it double) diaphragm.


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.



I got my data from an article by Gilbert Briggs. (Founder of
Wharfedale). They made them with both copper and aluminium voice coils.
The magnet might have been stronger in the later (1970s) ones.
--
Chris Morriss

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

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

In article ,
Chris Morriss wrote:
Well I could scan the text from the old Gilbert Briggs book but as it's
you Keith I won't bother

I doubt he would understand the figures anyway, given his dislike for
anything approaching an engineering knowledge.

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.

Yup. 'Product may be subject to improvement from time to time'.

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!

Probably 20 years.

--
* I like you. You remind me of when I was young and stupid

Dave Plowman London SW 12
RIP Acorn

In article ,
Chris Morriss wrote:
Well I could scan the text from the old Gilbert Briggs book but as it's
you Keith I won't bother

I doubt he would understand the figures anyway, given his dislike for
anything approaching an engineering knowledge.

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.

Yup. 'Product may be subject to improvement from time to time'.

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!

Probably 20 years.

--
* I like you. You remind me of when I was young and stupid

Dave Plowman London SW 12
RIP Acorn

"Chris Morriss" wrote in message
...
In message , Mike Coatham
writes
snip

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.



I got my data from an article by Gilbert Briggs. (Founder of
Wharfedale). They made them with both copper and aluminium voice coils.
The magnet might have been stronger in the later (1970s) ones.
--
Chris Morriss

Had another dig through my HiFi Yearbooks........the specs I quoted earlier
were in every issue from 1964( That's the earliest one I have - they could
be listed in earier issues, but I can't verify that) until 1975........
1976 onwards = oblivion ?