Ground loop with Miyajima Premium mono

My Miyajima BE Mono should be arriving this week and I look forward to hearing what all the fuss is about. I'll be using mine on a Schick 12" arm.

Lula, I think I can answer your question. Some mono cartridges (such as the Miyajimas) are "true mono" designs that do not have vertical compliance. This type of cartridge will damage a stereo record. Some other mono cartridges DO have vertical compliance and those should be able to play a stereo record without damaging it. From what I have read, Grado monos are in the second group but there are probably others as well.

Salectric, I know nothing about this subject (whether and why a mono cartridge could damage a stereo LP), but just empirically it seems to me that any cartridge with a conventional cantilever has "vertical compliance" to one degree or another. What the mono cartridge does not have is merely the ability to translate vertical motion into electrical output. So if a mono cartridge of the Miyajima type does have the capacity to damage a stereo LP, it should not be due to total lack of compliance in the vertical plane. If I am wrong in this idea, I hope someone will correct me. Thanks.

Whoops!!!! I was wrong indeed. I looked on the Miyajima website, where it says, "When it played a stereo LP with this cartridge, a sound is that a distortion and a needle do not work lengthwise, and there is the thing that a needle injures the ditch of the LP." I could not have said it better myself. Thanks for your insight, Salectric.

Here's a question: Is there any difference at all between the "BE" version and the plain Premium version, other than the species of the wood that is used? Miyajima website says nothing to indicate any other difference. A US vendor says there are indeed some internal differences between the two models, to justify the $250 price differential. Thanks.

Hi to all,
I have resolved the question with a Lyra Helikon Mono
cartridge.No hum. I think the problem is the Rhea,
on masses configuration.The doubled coils allow to function
without troubles respect a single coil.Also in agreement with what was said in the Lyra website.