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#21
The AD 9710 is a well regarded "full range" unit. Should be some material around on the Net for that one. The original had a Alinco magnet. Later it came out with a more common ceramic "pancake" magnet. Phillips did some nice gear in those days. It was always said that the R&D Dept was much better than their marketing people!
 
#23
The 9710 used to be know simply as "9710". Later on, the ubiquitous "AD" prefix was added. I don't know if that coincided with the change in magnet. I own the AD9710 with ceramic magnet and like it very much. The T/S parameters are very close to that measured on the AlNiCo version, by Troels on the link I posted.

The AD12202 should be very good on open baffle. The 9710 should be allright, just expect less bass and possibly too much HF (?). As for "boxed" designs, I'm not so sure about AD12202, but AD9710 has a large-ish Vas, so generally wants big enclosures. I found the AD9710 to do quite well in the 12" size Karlson I built.

http://www.diyaudio.com/forums/full-range/177937-diy-pair-k12-karlsonette.html

IMO, the smallest box for AD9710 would be ~30L sealed, with an adequate resistive vent, giving an aperiodic load. f3~80-85Hz. BSC will likely be required. Should be very tube friendly, judging by the impedance curve.

IG
 
#24
FYI the official Philips HiFi speaker construction handbook from 1977 (Sixth Ed. Completely revised) reintroduced a box design for the 9710/MC. It was 40 liters internal volume with a circular port 100mm internal diameter and 161 mm long and this produced a "reflex" at about 45c/s. (Or as they say 23c/s and 83 c/s.....peaks)
 
#26
IG81 said:
The 9710 used to be know simply as "9710". Later on, the ubiquitous "AD" prefix was added. I don't know if that coincided with the change in magnet. I own the AD9710 with ceramic magnet and like it very much. The T/S parameters are very close to that measured on the AlNiCo version, by Troels on the link I posted.

The AD12202 should be very good on open baffle. The 9710 should be allright, just expect less bass and possibly too much HF (?). As for "boxed" designs, I'm not so sure about AD12202, but AD9710 has a large-ish Vas, so generally wants big enclosures. I found the AD9710 to do quite well in the 12" size Karlson I built.

http://www.diyaudio.com/forums/full-range/177937-diy-pair-k12-karlsonette.html

IMO, the smallest box for AD9710 would be ~30L sealed, with an adequate resistive vent, giving an aperiodic load. f3~80-85Hz. BSC will likely be required. Should be very tube friendly, judging by the impedance curve.

IG
Click to expand...

I have a fisher tube amp I will try to to build a box like the one you built and hear how it sound.
thank you.
 
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