This.
That's why Chronic 2001 is my favorite album of all time from a production standpoint. Once I listened to that album with some audiophile cans, I was blown away by the multiple layers of sound. Haven't heard anyone do that shyt since Quincy Jones. Sure, Dre has some "aight" tracks every now and then (who doesn't), but you can't deny the mans ability to create audio masterpieces.