Benz LPS Sounds Bad, Very Bad at 45 RPM


Well this may be an issue no one has heard before but i have a fresh Benz LPS with maybe 30 hours on it thus far. It sounds very good at 33 1/3 RPM but sounds horrible (sort of a distortion that my wife can clearly hear) at 45 RPM on anything I have tried (Music Matters Blue Notes, AP Blue Notes and other high cost 45RPM recordings)

Did not have this with my Ruby 2

any thoughts??
davidriggs
I'd suggest you verify the speed is correct at the 45 RPM setting. Sounds like it might be unstable. I've never heard of a cartridge that sounded great at 33 1/3 but distorted at 45 if both speeds were accurate. My initial thought was the quality of the recording/vinyl was lacking, but it sounds like it's unlikely in your case.
What turntable? Did it sound bad with another cartridge, before you got the current Benz? Are you by any chance using one of those copper turntable mats?