Consider ignoring the "If You can’t Measure it"..."Only Trust Blind Testing" posts and LISTEN....
That’s just it you can measure it, and hear it. Going direct is even better again than the quote below by Nelson Pass, as there’s one less set of interconnects and a volume pot in the signal path, when going direct.
Nelson Pass:
“We’ve got lots of gain in our electronics. More gain than some of us
need or want. At least 10 db more.
Think of it this way: If you are running your volume control down around
9 o’clock, you are actually throwing away signal level so that a
subsequent gain stage can make it back up.
Routinely DIYers opt to make themselves a “passive preamp” - just an
input selector and a volume control.
What could be better? Hardly any noise or distortion added by these
simple passive parts. No feedback, no worrying about what type of capacitors –
just musical perfection.
And yet there are guys out there who don’t care
for the result. “It sucks the life out of the music”, is a commonly
heard refrain (really - I’m being serious here!). Maybe they are reacting
psychologically to the need to turn the volume control up compared to an active
preamp.”
Cheers George