Stefanl,
Denon measures their compliance value at 100 Hz. Several people have posted over on Audio Asylum that Denon Cartridges (at least the 103 series) typically have compliance values around double the advertized value when measuring in the 10 Hz range. For example, the DL-103 and DL-103R are advertized as having 5 cu but people have been finding it's more like ~ 9 cu. Using your weights and the 9 cu value, I get 11.3 Hz resonance.
I don't own any of the DL-103 series cartridges so I can't speak from direct experience on this issue.
Mr. Kidknow
Denon measures their compliance value at 100 Hz. Several people have posted over on Audio Asylum that Denon Cartridges (at least the 103 series) typically have compliance values around double the advertized value when measuring in the 10 Hz range. For example, the DL-103 and DL-103R are advertized as having 5 cu but people have been finding it's more like ~ 9 cu. Using your weights and the 9 cu value, I get 11.3 Hz resonance.
I don't own any of the DL-103 series cartridges so I can't speak from direct experience on this issue.
Mr. Kidknow