Preamp. Compared a 6SN7 based line stage to my 12AU7 based line stage. Put my 12AU7 based unit up for sale the next day. For me, it was all about synergy between components and the 6SN7 unit brought the system to that next level. Plus I learned that preamps have a huge impact on a system’s sound. Preamps are much, much more than a box to switch sources.
Best Stereo Upgrade Value
A question for you audiophiles...
What "upgrade/change" has singularly given you the biggest (not incremental) improvement to your stereo system? Upgraded amp, pre-amp, tubes, room correction unit, subs, connectors, cables, speakers, streamer, stylus, speaker placement, acoustic panels, etc.?