I used to listen to CDs on my dad's massive headphones with a big 1/4 inch jack plugged into his amplifier with the stainless steel face. Man, I loved that sound. It was rich, immersive, and as loud as I wanted. I could hear every instrument and the breathing of the lead singer. I have never been able to recreate that sound quality with smartphones. I have been trying for nearly 30 years. There are few good phones for audiophiles, and I really want there to be more. The Moondrop MIAD01 is a rare exception but falls short in a few areas.