What are your Eureka Moments in this Hobby?


OK so I did steal this term form @lordmelton 

I wandered through midfi.  Surround speakers, 5.1 set ups, eventually getting to Classe Pre / Pro, Parasound 5 channel amp, Bowers and Wilkens Nautilus 800 series speakers and M / K Subs.  Then the best thing ever happened.  My Classe SSP-800 Pre / Pro broke for the second time.  So I ended up getting an Audionet Pre G-1 preamp.  Eureka!  What were your events?

fastfreight

Fun topic! Thanks to OP for starting.

Getting an Audio Research LS2MKII with a Bugle Boy 6DJ8, in 1998. Opened my ears/mind to both tube-based equipment and Audio Research products. Since, everything I have purchased, except one-oye, and have really happy with, until upgrade-itis, has been ARC, and has synergy with ARC.

I have had a few:

1. understanding how important a tonearm is in the vinyl reproduction system. I replaced a Rega tonearm with a Basis Vector. The difference was astounding, and sent me through a lengthy system upgrade to see what else could be improved.

2. doing some room treatments took my system to another level. The best bang for the buck upgrade

3. replacing my very good tonearm cable with a great tonearm cable. It made a huge difference. Far more than I could have imagined