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Why Use Aluminum for a TT Platter?

Mass I am told is a good thing when it comes to TT platters. Lloyd Walker for one extolls it's virtues and as a rule some of the better turntables like to brag about their big ..Platters. Why then would aluminum, known for it's light weight (low density) turn up as frequently as it does as a platter material. I know it is easily machined but isn't there anything better and much denser.
mechans

Showing 1 response by peterayer

peterayer
1,382 posts
 
I think the key to an aluminum TT platter is to properly damp the aluminum to reduce resonance. This is often done within the platter and/or on top of the platter as in the case of SME. Mass does matter depending on the drive system and what problem the designer is attempting to solve.

Regarding the whole belt vs. DD discussion here, I agree with Dan ed, though this is far too complex a topic to discuss on this thread and I think we should stay away from gross generalizations regarding TT drive systems. It's how its implemented that counts.
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