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

Jumia, should have been more clear.

The gauge of wiring you _need_ to your amps is dependent on the fuse or breaker value on the amp itself.  14 gauge is enough for up to 15 Amps, 12 gauge for 20.   You _could_ get thicker wiring but not needed.  I personally like shielded cables over thick cables for the extra EMI/RFI protection.  Now that our homes are filled with wireless devices and Ethernet and USB cables I feel this is more important to me.

What about shielded and thick cables? Also it’s a 20 amp circuit breaker.

I am a big fan of shielded cables. Because it's nearly impossible two separate and space out all the cables in most rooms that have hifi equipment.

I thought correct Terminology was impedance for alternating current and for direct current its resistance.

The purpose of using fatter wire in branch circuits is to minimize voltage drop to the receptacle when there is a long run from panel to receptacle. That six feet from receptacle to appliance is trivial. Besides, the wiring from the amp power inlet to the power supply is not 10ga. It might be as thin as 18ga. How far can this iteration possibly go?

@jumia The power cord you need to your amp is by the breaker on the amp, not the panel.