Rega Isis cd player ......Dedicated 20 amp circuit?

A 20 amp power cord for a cd player? That must be some power supply!

The laser is so powerful it only plays CDs once!

For $10K it probably has a good size power supply to feed the tubes. If I paid that much for a CD player, I would consider a separate 20 amp circuit for it, even if it was  across the house from the breaker box. I see no downside.

Looking at photos of the rear of your cd player, it does not have the 20A male IEC power cord receptacle. The pin pattern for a 20A cord is different than a 15A cord. What makes you think you have a 20A cord?   

I have a REGA ISIS Valve spinner .... it is built like a tank at > 45 lbs in weight with a massive power supply.

Absolutely no need for a 20 amp dedicated feed (unless you feel compelled to install one for ??....): a "standard" 15 amp dedicated power line like I have. is perfectly fine.