Power Conditioner vs A/C cables

Ted dennehy, do you use OCC single crystal wire? And if you're just using ofc then your wire is behind the times because it's been proven for 40 years now that OCC single crystal is far superior to anything ofc.

Ted dennehy you charge $10,000 for a power cord LOL LOL talk about a rip off. There's nothing you can do to a cable with OFC wire in it to make it worth $10,000 give your head a shake.

Everything depends on money and your priorities.  I have always used after market power cables on everything.  They are definitely not my 1st priority.  After components, IC's make significant difference, followed by good isolation tweaks to help clean up everything, at that point, I begin auditioning different power cables and their various grades before purchasing.  They do make a difference and influence system quality.

“Is it necessary to buy expensive power cables downstream of a high-end power conditioner?”

Neccessary - no

Preferred - maybe 

It's a matter of personal preferences and ability.
Some people for whatever reason don't hear a difference while using after-market power cords, others do hear a difference. Just depends on which side of the fence you're on?