Pawlowski, A clamp could (in theory) transmit bearing and/or motor noise into the record, causing smearing of the audio signal. Obviously, warped records might benefit from the use of a clamp. However, I own a Sota reflex clamp which is/was touted to flatten such records; in my experience there are very few LPs for which this flattening effect really works as described. Usually the warp is worst at the outer edge of an LP, and the center clamp does very little to help. Moreover, if the warp is to the up side of the LP, the clamp can do nothing to help.
Imin2u, It's interesting that Sota at least used to recommend use of their reflex clamp even on their products that sported vacuum hold-down.
Imin2u, It's interesting that Sota at least used to recommend use of their reflex clamp even on their products that sported vacuum hold-down.