Uber, The 2-pin Denon is no problem, if you are content with driving only one of the two stereo channels, without a Y-adapter. If you used a Y-adapter (so as to be able to drive two channels in mono), there are possible issues with impedance, but the question is equipment-specific. You could try it. I'd go with the AT33MONO, if it were my choice.
The mono switch solution allows you (or anyone) to compare the very same stereo cartridge used in either stereo or mono mode on the very same mono LP. That way, there is no issue with the inherent quality of the cartridge, as opposed to the situation where you compare stereo cartridge A to mono cartridge B. There you are doing more than just comparing stereo to mono; you obviously have the confounding factor of the SQ differences between one cartridge vs another. But this must be at least the third time I've pointed this out. So I'm done.
The mono switch solution allows you (or anyone) to compare the very same stereo cartridge used in either stereo or mono mode on the very same mono LP. That way, there is no issue with the inherent quality of the cartridge, as opposed to the situation where you compare stereo cartridge A to mono cartridge B. There you are doing more than just comparing stereo to mono; you obviously have the confounding factor of the SQ differences between one cartridge vs another. But this must be at least the third time I've pointed this out. So I'm done.
