This is one of the more fascinating debates on WBF, and maybe gets more to the heart of art v science than many other aspects of choice in audio.
Tbh, I’ll take Mike’s comment that tonearm designers offer 12” variants more to satisfy market demand than for reasons of impvd SQ.
Unfortunately the rest of us don’t have Mike’s access to off the record comments - no, all we have are tonearm manufacturers’ websites that proudly proclaim the technical and indeed SQ superiority of the longer choice of arm.
I don’t recall many websites of designers offering 10.5”, 12”, 14” in addition to 9”, saying the longer variant is JUST an alternative and not backed up by superlatives.
So, if a bleeding edge 9” arm ie the SAT, that is as good as we’re getting at this length via crazy levels of engineering and use of materials, in Mike’s opinion just sounds better than any other tonearm, incl so-called superior longer arms, and he can demonstrate via his digital files that tracking error is reduced or eliminated as a noticeable artefact, then Mike’s opinion seems totally reasonable and logical.
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The q I’d like to ask Mike is that if he heard a new direct drive tt that absolutely slayed the opposition, and was in effect an absolutely king of the hill performer (by the same margin that the SAT has over “lesser” arms), would Mike be right if he claimed DD was de facto superior to belt or idler, and that’s just the way it is?
Even if the vast majority of tt users just could not get their heads around this?
Certainly the GPA Monaco 2.0 tt makes some very radical claims for natural superiority of the drivetrain used in possibly the world’s most bleeding edge DD.
Mike, if you heard this one, and really felt it wiped the floor w belt drive rivals, would you proclaim DD as by definition superior?