Does an aftermarket power cord matters for Amp?

I am currently using the stock power cord for my VAC Avatar tube integrated amp. I have upgraded my cdp's power cord (given the trigger-down theory with source component) a while ago with a Synergistic Research A/C Master Coupler and had good results. I have been wondering if I should do the same for the Amp and question if it really does make a difference. If so, is it significant and worth the investment?