Do I need upgraded power cables?

@bzawa

You got your answer right away from @bigtwin. Order three or four from one of the online sellers that offer trial periods/refunds and audition them for yourself. Audio Advisor is one example.

Personally, I favor The Cable Co. You can borrow burned-in cables from them, listen and decide for yourself. This has become my go-to approach to cable upgrades. I just completed a power cable comparison using their cable lending library and opted to stay with my current brand but move up their line. If you’re interested, PM me and I’ll give you the name of the guy I always work with, there. Very knowledgeable, patient and no hard-sell tactics.

Good luck!

I haven’t read through all the responses, but before upgrading your power cables you should install a dedicated electrical circuit.   It’s the best, least expensive upgrade you can do and while your at it add a good quality outlet.

@zimwig 

How much does this  "least expensive" option add up to, on average?

I'm curious.

@stuartk  I ran two lines and it was like $200 plus cost of the outlets I bought, but my walls were down at the time so may be more if they have to snake the wires and cut holes.  Just to give you a rough idea. 

My “least expensive” comment was really a best bang for the buck.  With a dedicated circuit, the background noise will be diminished tremendously.  It lets the music shine. Cost is all labor.  Get quote from an electrician.