Has anyone heard the new Audio Technica AT-OC9X series of cartridges?

Hi and apologies for taking so long to see your question. Yes I am using the stock Technics headshell with my SL-1200GR. It's May, 2020 now and I'm still enjoying the OC9XSL cartridge. It's a great combination. Neutral, detailed and dynamic without ever sounding analytical or sterile. Excellent imaging and soundstaging with Harbeth P3ESR speakers. The turntable and cartridge play music :)

Hi, just noticed your post. I bought the OC9XSL which is the top of the OC9X line and it's a wonderful cartridge. In my humble opinion it bests cartridges I've owned which cost twice as much. 

Hi samh. My OC9XSL replaced a Dynavector 20X2L in my system. The OC9XSL is quieter with less surface noise. The tonal balance is more accurate. The channel separation is amazing. The cartridge body is threaded for easy mounting.  

My OC9XSL is on the new Technics SL-1200GR turntable. My phono preamp is a John Curl designed JC3.

I bought the cartridge at the beginning of the summer and It continues to amaze and delight me. Sinatra, Muddy Waters, Gillian Welch, Bill Evans, Bod Dylan... whatever the music the reproduced sound is always natural, balanced, and lifelike. 

When I bought my cartridge there were no hands on reviews and I still can't find one. I gambled and I won.  I'm not a reviewer so I'll leave that for Mike Fremmer. I'll just say that this is not my first audio rodeo and I'm very very pleased with the OC9XSL.