Geoff's spinning vinyl again!

[02audionoob]

How much does the acrylic one weigh?

Needle Doctor told me the Pro-Ject Acryl-It platter weighs 1.6 pounds. I have not found a confirmation of the exact number, but at the Sumiko website I found the weight of the Xpression III is listed as 12.4 pounds and the Debut III is listed as 14 pounds. From outward appearance, it appears that this difference in weight of the two turntables would be due to the lighter platter on the Xpression III.

To be more specific about my Music Hall glass platter...it weighs 62 ounces. The GrooveTracer website says their acrylic platter for Rega matches the weight of Rega's glass platter at 70 ounces by using acrylic of a larger dimension than other acrylic platters. The GrooveTracer owner believes it is necessary to maintain the mass of the original platter and has stated that in other forums, like AK and VE. I suspect there's one advantage to the lighter platter in that the turntable could probably recover faster from wow and flutter with less weight to turn. However, the greater mass has more inertia, so it might experience less deviation in the first place...flywheel effect. I've been meaning to read up on that, but really I'd just like to hear it for myself.

[poppachubby]

I suspect there's one advantage to the lighter platter in that the turntable could probably recover faster from wow and flutter with less weight to turn. However, the greater mass has more inertia, so it might experience less deviation in the first place...flywheel effect. I've been meaning to read up on that, but really I'd just like to hear it for myself.

This...