I always had this doubt, Say suppose I hear a song in a marantz entry level receiver of 50 WPC at -35 db levels & next I use the pre outs & power it up with a rotel power amplifier & hear the same song at exactly the same -35 db level will it make any difference in sound quality? Will I hear more frequencies at the same level? I know there would be huge difference at high volume. My doubt is the same levels? Experts help me!