Just wanted to introduce myself! I'm Steve, the amateur audiophile. I don't know much about input/output impedance or what a cap upgrade does to a source component other than make it sound better but I know what sounds good to my ear and I love to learn.
I've got a 2 channel rig dedicated to analog, output being a sweet set of vintage KEF 104/2's that were left to me by a family member that i had restored.
Try not to spend too much on new components but i Looooooooove tweaks. Power regeneration, upgrading power cables, interconnects, and isolation tricks. Can't figure out if this has saved me any money or not but it sure has helped me squeeze every ounce of hifi out of my modest set up and it's been a ton of fun.
Thanks everyone and cheers!
Steve