However, since the AP LP was an order of magnitude quieter than the other LP at all frequencies, and only somewhat more audible at 400Hz than at other frequencies, does this not suggest that the coupling is pretty good? Agreed that 400Hz seems less good... The graphite platter has a natural resonance of 2KHz, the cast iron subplatter of 500Hz.Sounds like the platter pad is robbing energy from the platter and vice versa. That is a simple way to kill resonance. Empire used to do something like that with their two-piece platters in their 598 and 698 years ago.
Settled on this configuration after other platter pads sounded muddy by comparison.
do you guys ever just sit back and enjoy the music?:)Yup! And I enjoy it more when the system is really neutral (and so does my GF). That is why getting the platter pad right is important- you can't fix things downstream if the cartridge isn't able to do its job properly!
Look at this beauty:
https://www.technics.com/us/news/20190107-sl-1500c/
Sweet- may well be the next go-to entry level machine.