Replacing generic RECEPTACLES


How important is it to replace your generic receptacles with audio grade receptacles . I already replaced my stock power cords to high end Shunyatas. Would it still be necessary to still change my generic receptacles to audio grade? 
tattooedtrackman
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elizabeth...Thanks...But can u answer me this? I thought it would be dangerous if you used a 15a receptacle on a 20 a line, not a 20a receptacle on a 15a line. In my opinion it would be less voltage going into a 20 a receptacle on a 15 a line. But what do i know. 
Also when my electrician installed my dedicated 20a line for my amp and preamp he also installed a quad {4} outlet receptacle. Would this still be considered a dedicated line for my amp and preamp?