@cinqcepages you're also doing at least basic calibration when you install the cartridge on your tonearm? Failure to calibrate may be why you find the 2M Red fatiguing since that's generally not the case for that cartridge. Which is why it can be a bit annoying to switch between cartridges frequently instead of just getting one really good one and sticking with it.
Update on my TT causing distortion at higher volume
Recap: SLP-05 pre-amp. Cary 805 mono's Music Hall 11.1 I had a Gold Legacy MC. (under microscope the cart was damaged. Bent cantilever and the diamond was not pretty.
I did the cheapest thing first: I purchased the $100 Ortofon Red MM cart.
The volume jumped up way high. To be expected. The music is very fatiguing.
I did order the EAE GLO PETit BLK. Should be here in about a week.
Any suggestions on a warmer cart, for mostly JAZZ and occasional rock. That is not fatiguing? Price range under $700. I am not prejudiced for or against MM or MC
Thank you for any help / suggestions.