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Vinyl Asylum Welcome Licorice Pizza (LP) lovers! Setup guides and Vinyl FAQ. |
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Vinyl Asylum Welcome Licorice Pizza (LP) lovers! Setup guides and Vinyl FAQ. |
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In Reply to: Re: The Story of "X" (V15 VxMR) posted by John Elison on May 24, 2004 at 12:08:53:
Laminated pole pieces were first used in the V15III (1973), then through the M24H (for CD-4 discs) and the original V15V.The first V15V (1982) had a hyperelliptical (HE) tip and coil impedance of 950 Ohms (DC) and 330 mH. Design emphasis seemed to be on flattest frequency response (along with tracking ability). When the V15V-MR with microridge tip was introduced (1983) the coil impedance was lowered to 815 Ohms and 330 mH, probably to retain flat FR with the lower HF vinyl indentation loss of the MR tip. The ULTRA 500 (1985) appears to have the same configuration as the V15V-MR, but with a slightly different stylus cantilever suspension.
My understanding is that the new V15VxMR (1996) uses solid pole pieces, with coil impedance raised to 1000 Ohms and 425 mH.
My conjecture is that Shure abandoned the laminated poles to reduce manufacturing cost (and increase commonality across their new product line?). In each case, coil impedance and pole losses tailor FR to augment the stylus mechanical FR and vinyl indentation loss. Whether the small downward HF slope in the V15VxMR is an intentionally built-in "warmth", or whether that's the flattest they could get -- only Shure knows.
Regards,
Charlie
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Follow Ups
- A Brief History of Shure (well, not really brief) - Charlie S in Maryland 05/25/0410:01:37 05/25/04 (3)
- Re: A Brief History of Shure (well, not really brief) - Prism 15:25:28 05/25/04 (2)
- Inconsequential change? - Charlie S in Maryland 17:30:14 05/25/04 (1)
- Again, interesting stuff - thanks! (nt) - Prism 03:02:27 05/26/04 (0)
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