vacuum, worth the expence/hassle?

The new VPI TNT HR-X uses a ring weight that fits on the outer edge of the record, flattening out most warps and absorbing vibrations. It seems too early to gather opinions of its efficacy. VPI often sells parts like its record clamps independently of its turntables. Perhaps the ring weight will be made available, possibly replacing the need for a vacuum system.

James, adding a weighted device of the type that you mention may require a complete over-haul of how the suspension of the table is designed and / or set up. As such, i would proceed with caution when trying something like this.

This is not to mention the increased load on the bearing, which could be substantial if the device is actually massive enough to pull down / straighten out a warped record. On top of that, the record may experience "buckling" due to the uneven tension applied between the record clamp at the spindle and the outer edge where the device is pulling down.

The beauty of the vacuum system is that it does not add mass and the vacuum is applied evenly to the entire underside of the record. Like JA said, it is a design that Newtown would have come up with i.e. well thought out and working with the laws of physics. Sean
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I had a Sapphire and after many years of use I sent it back to Sota to see about upgrades. The deal they offered me on an upgrade was so good I didn't pass it up. I traded my Sapphire for a Star Sapphire and have not regretted it for a minute.

Every aspect of the sound has been improved. The bass is much more immediate with a greater punch. The midrange is smoother and fuller. The biggest improvement though was in the soundstage. I could go on about it for a long time and probably end up even boring myself not to mention you.

Call Sota and talk to Donna or Kirk. They are great people to work with and will not sell you something you don't want or need.

The vaccuum is worth it. AVOID VPI! Sota makes a better table and as a rule the comparable table from Sota costs less. Sota just doesn't advertise as much. They appearantly don't sleep with Michael Fremmer either.