Also, I think negative feedback implementations have come a long way over the last 40-50 years, and though the theory may be sound, the significance with good modern implementations is not what it was.
My Class D amp is dead silent, and has as good low level detail retrieval as anything I have heard. Of course, the room has to be quiet to hear it, which is a different issue that might often come into play.
My tube pre-amp is also mostly quite, though some low level hiss is usually audible in the phono section. AMount varies with tube quality. Not enough to matter for me with the right tube in good working order in play there.
My Class D amp is dead silent, and has as good low level detail retrieval as anything I have heard. Of course, the room has to be quiet to hear it, which is a different issue that might often come into play.
My tube pre-amp is also mostly quite, though some low level hiss is usually audible in the phono section. AMount varies with tube quality. Not enough to matter for me with the right tube in good working order in play there.