Does the length of the Cable matter?

cleeds

thanks for the clarification. Is the construction of a balanced cable more resistant to interference than a typically shielded rca cable, that was my assumption to suggest the conversion.

Over the years, I've used long and inexpensive rca cables, even 25lf to reach a sub, with no hum or problems, so I think OP should be ok. 

Is it an RCA to RCA cable, or a DIN from tonearm to RCA? easy to find and use long RCA to RCA. A bit harder to get a long DIN to RCA

Lots of people believe keeping phono cables short is important.

I ordered a custom 8 ft DIN/RCA cable for my 3rd arm from Pine Tree. Compared it to it’s OEM short cable, heard zero difference.

I would try your TT temporarily placed to use a short cable, then use an inexpensive long rca cable, hear any difference? Don’t forget some slack to turn equipment to have access to the rear jacks.

Then, buy a higher quality cable? Based on the Tonearm maker’s recommendation, I bought a high end Ortofon phono cable, didn’t hear any improvement than inexpensive cable I was using while awaiting delivery.

btw, if you have no choice, you have no choice!

IF hum is a problem, adapters exist to convert from rca to Balanced, simply to use a better noise resistant balanced cable for the run.

convert TT preamp out RCA to Balanced, then at the amp convert back from balanced to RCA.

female and male versions exist

various options