Randy, I've done that many many times; Class "A" is quite often infinitely more expensive than Class "B". While you can mix and match components to come up with Class "B" sound; to come up with Class "A" sound, you must have all Class "A" components plus what we are doing as best we can; to have that done by experts. Class "A" is a "SOUND" as well as components that are given that rating.
While it's possible to occasionally find an affordable Class "A" component, (I always buy if I can use it) it's not the usual case.
You can get lucky on "amps" and "pre-amps" in regard to affordable class "A".
In regard to class "B"; it's my favorite class because some of the components are almost Class "A", and I can pay for them; the word "afford" is no longer in my vocabulary.
Class "A" cartridges and turntables are out of most people's reach.
I hope I've answered your question.
Enjoy the music.