My setup is two KEF IQ1 speakers with a Eltax Atomic A 10.2 subwoofer, a Harman Kardon AVR 230, and a Moondrop Discdream 2.
I'm quite happy with it, but regardless, what is the weak point in my setup that would make the most difference for actual quality?
Would switching out a Yamaha AX-9 or Marantz PM5003 be a noticeable upgrade over my Harman Kardon AVR 230?