Should I update my manufactures power cords?

Those amps will benefit from upgraded power cords

Also try the amps plugged directly into wall and not into power conditioner. I had AQ Thunder and upgraded to the Hurricane. The improvement was not subtle. However, in the end, I sold the Hurricane cords. They made my system sound a bit too syrupy and dark. Home audition is a must.

I'm not a huge fan of expensive PCs but I do use shielded PCs after my power conditioner to minimize the opportunity to pick up digital and other noise.

“Manufactures” is a verb — you’re looking for the noun, which is “manufacturer’s” power cords. AQ “manufactures” power cords and are a power cord “manufacturer.” One is an action and the other is a thing. See the difference?  Argh!

Being a pedant can’t be healthy.

Mfg power cords are Garbage ,no matter how good your line conditioner is 

Thunder power cords starting with your amp and Dac would be a substantial upgrade .I use at m8nimum like myPowered subs ,Pangea sig mk2 power cords awg 14perfect for a LPS or router, that’s another story any junk wall warts get rid of them a good LPS power supply is a must if you want clean digital .

not 1 piece of equipment should even use the junk stock power cords !!