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PA, Read my looong topics on my adventure with the JVC direct driver and the van Alstine Longhorn mod topic...you'll see I explored many issues of both direct vs. belt drive and various cartridge experiences, including that of the Ortofon.
I've got a Musical Surrounding Phenomena phono pre with outboard battery pack (connected with low inductance Revelation Audio Labs umbilical - a fine upgrade, brought real punch to the combo).
My main pre is a Dynaco PAS-4 with phono...a very nice unit...but I think the Phenomena pips it by a little. Tho, with moving magnets, I run them straight into the Dynaco so as to keep overall capacitance down. The AT440ML, at 490 mH, is critically damped right around the (bog standard) 47K input of the Dynaco...making it the right choice for that application.But, for the other cartridges in my growing collection (Grado Green, Ortofon, and vdh re-tipped Blue Point) I use the Phenomena.
You will be surprised what the Dynaco can do if AC noise and vibration are addressed. If you care to hear some suggestions...1) ACME silver plated cryo'ed outlet.2) Cryo'ed Absolute Power Cord MK II3) Parallel AC filtration on the ACME outlet.4) Compatible, fast draining cones with a *proper* wood board underneath. Wood board supported by a rubber/cork/rubber slab.Try it...
the Ortofon X5-MC is probably just a good cantilever away from really, really good performance.
I am also running it into all tube amplification which, no doubt, has plumper, rounder bass lines than solid state....encouraging the Ortofon to not sound so lean.
I have zero real complaints now - that was the point of my last post on it - I think you misunderstood it (read it again)
A friend of mine has one of them JVC's with servo arm & associated bells & whistles. I've been telling him to get a surplus power supply from eBay and use it outboard. That would be your next upgrade...
btw I also used different settings for my phono pre but that didn't really solve it for me.
I don't know if you still own your X5-MC, but perhaps part of the shortfall of bass/dynamics (other than loading at 1K - which you've done) is the rattling Noryl (plastic) cartridge body. The Longhorn modification will both help tracking and damp the cartridge body...no bad thing either.