Dear @sokogear : @drbond is rigth in his post:
"" but the sonic difference is very significant even on flat, non-warped records: *everything* is much clearer, cleaner, and more detailed. ""
A good clamp as Basis Audio one makes that resonances/vibrations developed between the cartridge stylus tip, LP surface and TT platter change its resonance frequency out of our ears frequency range or at least we can't listen any more and everything improves. Even improves the cartridge tracking task and helps with the cartridge/tonearm developed feedback distortions . A clamp is a must to have.
R.