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A good friend inherited a Thorens TD-121, McIntosh MC225, and Mac preamp from his father. Several years ago I built a multi-layer birch ply plinth but left it raw wood. Since Michael Samra is rebuilding his MC225, I decided we needed to do this right. So.........veneered his plinth and gave him a Rega RB250 I wasn't using. When he got it from his Dad there was also a still good ADC XLM MkII which I mounted and aligned. Testing by listening to "Camarillo" from Sheffield Labs direct to disc. Wow!! In the background is my JVC QL50 with DIY carbon fiber tonearm. Fun, fun!
For making me feel better. I thought it sounded great when I hooked it up and my friend came and picked it up last night and we listened to "Camarillo" again and he was blown away. I looked at the diamond under my microscope and it looked fine. Everything aligned easily and I'm tracking a little heavier than the 1.2 gms recommended on Cartridge Database. My friend is very pleased. I love that Zebrawood veneer.
...seems like there might be a mismatch, what with the ADC being possibly the highest compliance cart ever made. It was designed for ultralight arms like the Infinity "Black Widow" or the Grace G707 (a popular pairing back in the day). The Rega arm is medium mass at least, and well suited to many
MC's. I know you're hearing what you're hearing and it sounds great ...just sayin. A table at this high of a performance level would get a lot out of a nice Dynavector 20, or find a vintage Benz MC20 (I think that was literally designed around the Rega arm- they show up on auction websites every so often, cheap enough to afford a retip if needed). I owned the DV 20 and it sounded great after a long break-in. I heard the budget-Benz and it sounded beautiful but perhaps a little thin in comparison, but I doubt it was broken in.
was not as high compliance as other models if I understand correctly. The cartridge database over at VE has the dynamic compliance coefficient at 40, which is high but not 65 like the higher compliance model. I have a mk II that I've put on a bunch of different medium mass arms and it sounded great on all of them with no tracking issues. I agree that the math doesn't entirely add up but proof is in the pudding. I've had other medium to high compliance carts on the same arms that had noticeable resonances and tracking issues. Go figure. My dad has (or perhaps had) one on a Rega 250 and it also sounds/functions great. Its a great cart and about as good as you can get in MM, at least from what I've heard.
You can't cheat an honest man, never give a sucker an even break or smarten up a chump -- W.C. Fields
compliance. I had the MK II and MK III which worked fine in low/medium arms.
Opus 33 1/3
It was so high in compliance (the original ADC XLM) that it often seemed the suspension had collapsed, when in fact it was "normal". The cartridge body rode perilously close to the LP surface.
Opus 33 1/3
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