Not to take it marginally off-topic, but I'm curious if anyone has experience with dedicated mono cartridges?
I use a Denon DL-102 which is a true mono reproducer (only one coil wagging) but is also vertically compliant so no danger of inadvertenly chewing up a stereo pressing.
Surface noise is significantly lower since vertical movement produces negligible output. Also I notice bass is "sturdier" (probably due to complete lack of phasing problems on mono masters) and overall tonality is so very satisfying. I love those '50s recordings.
The 102 has a 0.7 mil spherical stylus since it was designed for mono playback of stereo records in Japanese broadcasting studios in the late '50s before they re-equipped for stereo broadcasting (using the Denon DL-103).
Dedicated mono (i.e. horizontally compliant only) cartridges, like the Ortofon CG 25 Dia, use 1 mil spherical styli. I would love to be able to compare and hear what a difference stylus size makes, riding in a different part of the groove.
I wholeheartedly recommend use of a mono cart for mono records, you will be pleasantly surprised at the difference!
Brian.