Er...what?
With the advent of the Compact Disc, the bottleneck became the loudspeaker.
Personally I reckon the source that really shines a glaring searchlight on inadequate speakers is analogue-mastered vinyl....
I have previously related around here the tale of a mate who spent a small fortune on new HiFi kit, only to have me cast aspersions on his right speaker. He had the speakers biwired and had left the links on the right-hand one. After fixing this small configuration problem everything sounded right, but he couldn't tell the difference!
The first thing you need in an audiophile setup is audiophile ears.......
Biting the hand that feeds IT
