What is your experience with the law of diminishing returns ?


As subjective as it might be. Personally, I have not encountered it yet.
inna
Post removed 
You guys gotta check it out. Low mass inexpensive systems are where it’s at. No more house AC, AC ground, no more speakers, speaker cables, amplifiers, preamps, interconnects, digital cables, fuses, no more transformers. No more distortion. No more noise. No more pencils, no more books, no more teacher’s dirty looks. 🧐
A different perspective...
Twenty years ago, when I had better ears and a less expensive audio system, I made a visit to the local high-end store. I had $5k invested in used equipment (ARC tubes, Soundlab Dynastats, HGS sub). Listened to my reference music on an $80k new system (Martin Login top of the line bi-amped with four Krell monster mono amps, etc.).

The higher end system definitely sounded a lot better. The 3D soundstage really stuck in my mind. After an hour of listening I walked out of the store with a big grin on my face thinking I didn't really hear $75k of difference.