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In Reply to: RE: Were we sold a bill of goods with 180 gram vinyl? posted by ecl876 on January 29, 2015 at 18:07:31
When a record is flat, it makes maximum contact with the platter mat. When this happens, the record is mechanically coupled to the platter and energy in the LP can be dissipated. Warping has been a continual problem with new vinyl. I'd rather have a 120g pressing that lays completely flat than a 200g pressing that only contacts the turntable at 3 or 4 points.
And then, of course, there's all the distortion associated with tracking a warped record.
Follow Ups:
That is exactly why I bought a turntable with vacuum hold-down. Not only does it eliminate internal vibrations within the vinyl LP by pressing it firmly against a massive platter, but it also flattens most warped records completely. Of course, it won't flatten 180-gram or 200-gram pressings if they are warped. It uses a vacuum of only 3" Hg in order to prevent out-gassing of the vinyl. However, that still results in a pressure of 150-lbs distributed evenly against the vinyl surface, which will flatten most 120-gram LPs completely.
Best regards,
John Elison
I am big fan of vacuum hold down platters. All the turntables I've heard with one also play with less surface noise and tics/pops.
Yeah, mine is pretty darn quiet! ;-)
Cool turntable
How is that Dynavector (XV-1s?) compared to the DL-S1?
I didn't like the XV-1. I prefer my Denon DL-S1. It just sounds better in my system. YMMV
If the LP surface is not flat how do you achieve proper azimuth across the entire playing surface?
Ed
We don't shush around here!
Life is analog...digital is just samples thereof
You can't. The stylus will be canted in some direction much of the time. THD will be all over the place. Basically, a warped copy is a lower fidelity copy.
The vinyl resurgence isn't about fidelity. It's about having a physical artifact and the presses are running night and day. We all know records can be stunning so I hope the situation evolves into something better. Even though I didn't always like the sound of audiophile pressings back in the day, the vinyl was usually immaculately pressed.
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