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Multi-Way Conventional loudspeakers with crossovers

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Old 1st August 2012, 04:45 PM   #1
dnic77 is offline dnic77  United Kingdom
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Default unknown speaker help

hi, i won these drivers on ebay and there is no markings on them so i have no idea what they are i contacted the guy and he said this....

(They are an french imported clone of b&w cm4's and as such do not have a specific make.

A good bass/midrange driver.

I noticed they worked well in a 2 cubic foot enclosure, crossover at 5khz.

For use as a quality general purpose driver up to professional use.)

still not much for me to go off, ive searched google for hours with no luck! ive had a multi meter on them and they are 8ohms and measure 7"s total.
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Old 1st August 2012, 06:33 PM   #2
dnic77 is offline dnic77  United Kingdom
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just spotted this on the back of them... 311tm
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Old 1st August 2012, 11:50 PM   #3
sreten is offline sreten  United Kingdom
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They may be a clone of the CM4's 0.5 way driver, but expect a large
peak in the response typical of most metal coned bass/mid drivers.

Measurements and an elliptical crossover are usually needed,
see : Zaph|Audio It outlines the general approach.

rgds, sreten.
There is nothing more practical than a really good theory - Ludwig Boltzmann
When your only tool is a hammer, every problem looks like a nail - Abraham Maslow
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Old 2nd August 2012, 12:05 AM   #4
dnic77 is offline dnic77  United Kingdom
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finally! thank you its a lead. They are a metal cone with a aluminium cone centre. Thank you again for your reply.
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Old 18th June 2014, 08:13 PM   #5
dnic77 is offline dnic77  United Kingdom
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After all this time ive come across the manufacturer off these speakers. Alcone AC 6.5 HE, https://www.lautsprechershop.de/pdf/alcone/ac65he.pdf . Very happy
as I won these on ebay for 10ish.
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Old 19th June 2014, 12:00 AM   #6
GM is offline GM  United States
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Thanks for the update! Looks like it can drill through teeth.

Loud is Beautiful if it's Clean! As always though, the usual disclaimers apply to this post's contents.
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