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.?

bheyamoto

In the last 20 years the biggest grin has been the addition of Lyngdorfs MP-40 Processor. Moving to Room Perfect was something I had to witness to believe. Maybe its because of their management of my 4 subwoofers, but its money well spent   

Assuming not starting with complete crap room and equipment …

My biggest ‘macro’ bump was first pair of audiofool-quality speakers (ProAc)

My first ‘micro’ bump was adding an outboard amp to a receiver.

Biggest changeout bump was going from Rega/Denon to Oracle/Syrinx/Koetsu.