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In Reply to: Is there a BIG diffrence between a Shure V15VMR to the V15VxMR posted by Backbeat1954A@aol.com on November 11, 2004 at 07:28:40:
Both models share the hollow BE tube cantilever and damping brush for good tracking, so both are equally gentle to records. But they do not sound the same. Preference is a matter of taste. Here's why:While tracking ability is dependent on mechanical construction, frequency response is a function of the combination of mechanical, magnetic, and electrical characteristics.
The original V15 V was designed for exceptional trackability AND flat frequency response. The original V15 V cartridge came with a HE hyperelliptical stylus tip; when this was replaced with the MR micro-ridge tip high frequency tracing was improved, and the cartridge coil structure (including the laminated pole pieces) was slightly modified to preserve flat response with the new tip. The ULTRA 500 shared most of the V15 V-MR design features and performance.The V15 VxMR is quite a different beast. It keeps the MR tip and Be cantilever for low mass and high-frequency trackability, but the coil/pole structure is different (the VxMR does not have laminated poles) as is the stylus suspension/damping block. My conjecture is that Shure wanted to reintroduce a V15"V" model but maximize commonality of the body internals with the rest of their product line for lower cost. As a result the VxMR's frequency response is neither as flat nor as extended as the older V-MR. The ads tried to make this a virtue, citing the VxMR's greater "warmth".
Follow Ups:
Do you also find the V15VxMR has lower compliance than previous Shure cartridges? I own the new V15VxMR and I feel it is more of a medium compliance cartridge than earlier Shure cartridges, which were definitely high-compliance.Best regards,
John Elison
John,The static (zero frequency) compliance of the original V is definitely greater that the V-x, although this isn't necessarily pertinent to effective compliance (and damping) at higher frequencies -- either arm resonance or music frequencies.
I think they changed the ratio of metallic spring and elastomer suspension compliances in the "x". The "x" has a fatter brass stylus carrier tube, so the elastomer donut inside may be thicker. No idea whether they both use the same elastomer material.
I have samples of both the V and V-x styli, but they are in good condition so not subject to dissection in the interest of science. ;-)
The older V15 III had even higher compliance at low frequencies, thus demanding use of low effective mass tonearms.
Regards,
Charlie
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