Fidelity Designs LTD

Platter upgrades.

Replace your platter with a precision machined version made from the latest adavnced plastics.

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Description of platter upgrades.

Posted on by Ben Lamb -

Fully machined platter upgrades start life as a block of cast Acrylic. The Acrylic is cast into sheets and its surface is uneven as stock. This means the platter must be time consumingly machined over all its surfaces. The platter is first cut from the block by a CNC machine and then machined in a lathe around its center. Rega upgrade platters are made with a pocket machined in their undersides to contain the sub-platter, motor pulley and belt. This enables an upgrade that does not effect the VTA of the turntable and compensates for the lack of a mat. Acrylic is quite similar to Vinyl in regard to its resonant properties and ensures neutrality and lack of resonance for your turntable. The platters have their mass concentrated around the outer edge which creates a flywheel effect, increasing the gyroscopic properties of the platter. This effect provides improved pitch stabilty and takes load off the turntables bearing leading to more efficient operation. For the user wanting the ultimate in performance I offer a 25-26mm Delrin or Acetal platter which offers the best resonant match for Vinyl and also good mass. There is now a 15.5mm Delrin/Acetal platter available offering the benefits of Delrin/Acetal at a lower cost. Approximate weights for the Rega platters are 2250g for the 25-26mm Delrin/Acetal platter, 1650-1700g for the 23-24mm Acrylic platter, 1500g for the 18mm machined Acrylic platter and 1500g for the 15.5mm Delrin/Acetal platter.

Please note Delrin is a brand name for Polyoxymethylene (POM) Homopolymer and Acetal is a generic term for Polyoxymethylene (POM) Copolymer. Both materials have the same mass and for turntable use I recommend Acetal as I can offer it at a better price, it also has better chemical resistance, Acetal does not suffer from pronounced centerline porosity. If you look at the image of the black Delrin platter you can see the porous centerline in the material which looks like a grey band. This area is invisable in the white version of the material. Both versions of Polyoxymethylene are available for customers.


Video of the first prototype platter that lead to today's products.

The cost of a 23/24mm thick Rega platter upgrade is £89.99. An 18mm machined Acrylic platter is availabe for £69.99. Please contact for cost of Delrin/Acetal 15.5mm platters and 25-26mm platters due to changes in the cost of materials.

These platters can be used to build your own turntable with one of my sub-platter bearings. These products offer a cost effective basis for a superbly engineered turntable that you can build to your own specification.