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Speaker Asylum General speaker questions for audio and home theater. |
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Speaker Asylum General speaker questions for audio and home theater. |
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In Reply to: Poll - What *type* of speaker ended your search? posted by Presto on May 30, 2012 at 12:03:30:
Late 1970s, made locally by Audiosphere. Mdel 3 2-ways using a WR smooth roll-off Foster/x woofer, and their big 35mm dome. I'd been involved in the development as a listener.Cast in reinforced & plasticised off-white concrete, in two halves and then cemented together with the same mixture. The casts were made from layers of marine ply glued together with 2-part epoxy and lacquered. So the cast spheres have fine ribs running around them.
That mean old single internal standing wave of a pulsating sphere? These are truncated by a small as possible circular baffle, which effectively spreads it into several, and thus much lower inenergy, modes - easily damped by the BAF lining. Most models are ported with a QB3 critically damped alignment.
Smooth diffraction behavious is easier to compensate for and it does help with nuance, expression and interplay. A quiet enclosure is also a good thing.
The originals used metallised film good sounding plastic dielectric capacitors in ladders, air core coils, all this in the late 1970s. The original pair have NOS tweeters due to cat claws. I picked up a second pair a few years ago.
Note that I bought the original pair instead of QUAD 57s, I was laso considerring NS1000Ms, or minis with local sub/stands, B&W's DM5s or LS3/5As.
I was working weeknds at Duratone Hi-Fi at the time. There was only one speaker around which was more open throated and true on voices, the smaller Audiosphere Model 2 using one of the famous Coral Flat 5 WR drivers. Far less bass even than the QUADs, and very easy to damage with a full-range signal played loud! I have a pair on loan and will soon own 3 more M2s.
One of the original two guys still makes a 2-way, much sought after by top musicians. I think it uses drivers from Triangle, or maybe Visaton.
I'm planning an active 3~4 way using M2s and M3's.
If I could run to Mangers I'd buy a pair to put in emptied M3 'spheres.
Warmest
Tim Bailey
Skeptical Measurer & Audio Scrounger
Edits: 06/01/12
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Follow Ups
- spheres with efficient easy to drive WR drivers as their base - Timbo in Oz 03:11:28 05/31/12 (0)
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