Do I need 10 gauge power cord if I have 10 gauge from panel?

This really didn't seem to be a difficult question but I guess it is.

I was just curious if the last few feet make that much of a difference if you use a larger gauge Power cord when using a 10 gauge wire from the panel to the outlet. The bulk of the muscle effort comes off the panel to the outlet I would guess and maybe to extend a 10 gauge to the amplifier is very important.

It's not about having enough power for the speakers. It's about improving on the sonic benefit of a higher gauge Power cord. Mackintosh is a bit narrow viewed on this issue. Very perplexing

I found this an interesting thread. Has anyone else besides me looked in their power amps to see what was the size of the power cable to the on off switch? On my Conrad Johnson Premier 4 it appeared to be #14 wire. The wire to the power transformer was the same. Seems to me if this superlative amp can hit instantaneous crescendos without those puny 14 gauge wires acting as fuses, then perhaps we have an incomplete understanding of the physics/science. I have 12 gauge wire feeding my power and pre-amp both. It has met my standards for excellent sound.