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ElbowGeek

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In Reply to: Ahhh�.. posted by millen on April 23, 2007 at 21:49:31:

Cuz that is one seriously sexy bit of kit. And the RS receiver I was referring to was apparently manufactured by... HH Scott I believe? Or Sherwood - one of those S named companies. Apparently one of the last pieces they manufactured before going completely off the scene. It also had the distinction of being one of the very first pure digital tuners, although on my example it was non functional.
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Shhh....pipe down him might hear you..... - millen 22:05:59 04/23/07 (2)
There you go�.BTW, the Radio Shack linaeum tweeters was a collector back then�I bet they�re hard to find now the original ones anyway.
- That was the irony of the Shack... - ElbowGeek 22:11:09 04/23/07 (1)
  They would have incredible stuff mixed in with utter rubbish. Kind of like a Goodwill today - you had to really know what you were looking for. Some people seem to wax poetic about the Mach series of big speakers for instance.
  That tweeter looks gorgeous, BTW. What was the technology in them?
  - What's so special about the Linaeum tweeter?..... - millen 22:27:46 04/23/07 (0)
    In a conventional tweeter, a coil of wire suspended between the circular poles of a ring-shaped magnet moves backward and forward according to the dictates of the electrical signal, driving a dome or cone diaphragm to excite the air. In the Linaeum tweeter, there's still a voice-coil, but this time it's flattened into a vertical shape and suspended between opposed rectangular magnet poles. It still moves backward and forward, but instead of driving a diaphragm, it pushes and pulls the vertical joining point of two semi-cylindrical 3"-long sheets of stiff plastic film, each of which is fixed at its other end. Imagine two (empty) beer cans side by side: the point where they touch is where the voice-coil is attached. Under the influence of the electrical signal, the two semi-cylinders rotate back and forth, the resultant traveling waves producing sound.
    The advantages over a conventional tweeter are a uniformly wide horizontal dispersion pattern and good linearity, both of which lend the tweeter some of the attributes of a good planar drive-unit. If, as in the LX5, two sets of diaphragms are placed back to back with a common magnet structure, sharing a common voice-coil, those at the rear pull when the front ones push: the radiation pattern is that of a dipole. The radiation to the rear should produce an enhanced feeling of "airiness" to the speakers's sound in all but the very deadest rooms.
    According to Linaeum's Ben Stutz, Linaeum assembles the tweeter subassemblies for RadioShack, shipping them to the Far East to be incorporated into the speakers. (The LX5, for example, is made in Malaysia.) The tweeter used in the LX5 differs from that used in Linaeum's own models in using a thicker diaphragm, the result being reduced sensitivity.
    (Stereophile excerpt)
    - FYI (Open in New Window)

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