It always depends on goals. Set percentages can be a guide but those percentages can shift wildly depending on overall budget. I’m presently (waiting for new speakers) listening to speakers that represent 5% of my total system. Many might listen in my room now and wonder why new speakers? LOL, they might be correct.
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.?