@danmar123 It should be the same material as the plinth that supports the platter bearing. It should also be as rigidly coupled to that plinth, to the base of the platter bearing, as possible. This will reduce coloration; the idea is that if there is vibration, the platter bearing and the base of the arm are moving in the same plane so as to reduce the arm's ability to pick up that vibration. |
@atmasphere that’s the answer I was looking for. I have a 2 piece aluminum arm board now, I’m going to look for a billet aluminum arm board now. Thank you! |
@danmar123 If the arm board is made to be non-resonant and so is less resonant then the plinth, the two will not vibrate the same way (of course, ideally both should be inert). This will allow vibration in either to be more easily transduced. |
@atmasphere what I've been reading is that Corion is a good choice, this is why I asked the question in the first place. |
@danmar123 It might be, particularly if the entire plinth is Corion and there isn't a separate arm board. It would be even better if the whole thing were laminated to a substantial aluminum or steel sub-plate so the two dissimilar materials could rob energy from each other. The metal sub-plate would also give the Corian some stability, something it lacks on its own. |
