VPI turntable again......
I did find that on my TNT Mk. 5, not using a flywheel was better. I cant quite express the difference since it was subtle but, the sound in general was more realistic. I have never heard the motor on my TT make noises or heard it through the speakers, even in the very softest passages in the music. I can only presume that the problems Edle describes were due to faulty setup or malfunctioning equipment. Happy Thanksgiving to all and best regards. Santiago |
I applaud you for thinking things through and using logic as a guide. In audio stuff, in my opinion, there is a lot of "voodo" equipment out there that is sold to the most gullible. That said, a lot of times what ends up being 'right' in any field of evdeavor is counter intuitave. In my opinion, VPI designs (and all other quality designs) tend to be based upon finding what sounds the best to the designer. This involves a lot of trial and error and the end result can end up being very different than would be predicted just by speculation. |
Edle, correct me if I'm wrong, but I assume you're following up to explain a comment tossed out in this other thread, just as people posting to that thread asked you to do: http://forum.audiogon.com/cgi-bin/fr.pl?eanlg&1101269900&openusid&zzEdle&4&5#Edle Assuming this is the case, congratulations and thank you. You've done a nice job explaining your opinion. As a suggestion, this may have made more sense to folks if you had posted it as a follow-up post to that same thread. The responses you've already received pretty well cover any thoughts I would offer in reply to your arguments about the VPI designs. . |
OK, so I'm a nurd. Was walking the dog this morning and got to thinking about your theoretical objection (i.e. 800 rpm = bearing noise). There are two ways to get high effective inertia, one is to spin something really heavy, or with a really large radius at low speed, the other is to spin something lighter or smaller in radius at high speed. If you want to get really nurdy, Torque = (Inertial mass) * RPM. When you go with the low speed approach you have to deal with a few problems, one is that there are physical limits on maximum size of a turntable system, another is that precision is more difficult to maintain as you scale upward, a third is that if your device spins on rolling bearings then the number of bearings (and the chance of getting one too far out or round)goes up as the bearing count goes up. When you go with the higher rpm approach some of the design challenges are reduced in magnitude and you can get higher effective inertia than would otherwise be possible for practical reasons. In any case, still think that the proof is in the pudin, but even from pure speculation you can make a case for either approach. Happy Listening! |
