My Nottingham Mentor has both recessed areas machined into a 1 inch cylinder of graphite. Aftermarket mats invariably diminish performance.
recessed center in old turntables platters ... why
why old turntable platters (like garrard for example) has a recessed center for labels and new ones (like VPI) don't?, I supposse that what is good for records in the 60s or 70s should be good now right?. would like to hear your opinions about this matter. Thanks in advance