its all in the drivers working with each other what freq's sounds best from the drivers you use and how loud each driver is producing its best sound no over laping freq's as this is the cause of unclean sound paper cones can degrade with time moisture and how hard they've been played but possibly still sound great
Buying used vs new speakers from a technology perspective
Do you believe a speaker's components like drivers and crossovers can become "outdated" for lack of a better word? For instance say someone is selling a pair of speakers that cost $10k in 2008 for $5k now. Comparing that speaker to a modern day $5k new speaker only looking at driver design/drivers, cabinet construction, crossover components/layout and other materials what kind of technology gap are we looking at?
Have there been technologies or designs that have come out in the past few years that you couldn't live without after hearing?