A $300-$400 turntable tweak

I also tried a few different center weights for my VPI (with and without the rubber washer). I found that none of them improved on the sound of the original one piece Delrin VPI clamp and washer. Most sounded worse.

I have not tried a ring because I only have a few rarely played records that show a warp with the Delrin VPI clamp. I do have a speed controller, which means the peripheral weighting would probably have a minimal effect on speed stability, so I find it hard to justify that extra cost.

To some extent, there is bound to be a trade off in using a record weight and ring. While you will flatten records and get better coupling between record and platter, you may increase bearing noise through the added weight of those two pieces. That added noise combined with better coupling of the platter to the record, may significantly increase the noise heard through the stylus. It may also render some bearings inadequate or non functional, such as an air bearing or magnetic bearing. On my Transrotor Fat Bob, which has a magnetic bearing, I havent heard a problem using both, but it already has a massive platter and magnetic bearing. On a Rega, you might have a different result.

Manitunc,

I agree, magnetic bearing's like yours and on Clearaudio's bigger CMB tables are unaffected by the additional weight.

Raul:

I'm not sure that I completely understand you, but my observations suggest that peripheral, vacuum and center clamps can all be positive, as long as the clamping force that they impart can be adjusted to the needs of the individual situation. And in general my experience has been that too little is preferable to too much.

I will add that center clamps help to terminate the noise and vibration caused by the spindle bearing - these devices address more than just the LP.

Also, the material and construction of the clamp are definitely audible.

BTW, was this question a prelude to some Raul-designed clamps which will again show how the AHEE has led audiophiles astray? (^0^)

cheers, jonathan

Rockitman,

I dont know if I agree with your statement that the additional weight will not affect a magnetic bearing. Depending on the strength of the magnet, it may not be able to maintain the separation between the bearing surfaces. And with some magnetic bearings which only lessen the load on the bearing surface, not eliminate it, the extra weight could have a negative effect.