Should I update my manufactures power cords?

@farne230  - Take a look at Audio Envy - they are a great place to start.

For better performance on amps take a look at Zavfino - a little more pricey but worth it for amps like yours

If you want to get some knowledge about cable science, take a read of this thread

• What Makes A Good Cable

Regards - Steve

@farne230 

I have a pair of 611s and a C2700. I found the most significant gains in my system were from the PC and interconnects connected to my DAC. I am powering my DAC with AQ Dragon and the monoblocks with AQ Hurricane. The C2700 is being fed by an Audience Front Row PC. The Thunder is a good cord, and the Hurricane is probably the sweet spot in their lineup. 

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.