A correct platter pad will have the same hardness as vinyl so that any vibration from the LP can be absorbed.
Aluminum and any metal for that matter is far too hard.
Acrylic is too, but obviously less so than metal. IME, the harder the material, the more issues with high frequencies.
Aluminum and any metal for that matter is far too hard.
Acrylic is too, but obviously less so than metal. IME, the harder the material, the more issues with high frequencies.