So many...which date to the late 69-early 70 when my father bought me, I was 5 years old, a tube amplifier that needed a LOT of restoration, and after 8-12 months was ready to be plugged into my father's Tannoy. Still bring chills when I remember the tubes lighting up, this alone was probably among the most influential things ever happened to me. I am autistic so at that time autism was not all well understood, still isn't understood but we are making progress, it help me to connect to something, and without knowing all of the sudden this little boy found a way to connect and be more "normal". My dad recognized this and soon I was restoring radios and amplifiers in my town. My path into electronics, music, turntables, records, computers, math and physics was now set.
Second to that, when my father introduced me to Hiroyasu Kondo in 1991, that same year, I sold my car, and pretty much everything else so I could afford my first Kondo, OnGAKU which I still have, and started generous client-owner relationship Hiroyasu Kondo. Now I have 4 of his amplifiers.
Third might be the first TechDas TT and the darTZeel nhb-458 which was my first serious SS amp purchase.