Higher price is no guarantee of better sound, which is subjective anyway, but higher cost from the builder’s perspective allows for more expensive, higher quality, more resolving, and hopefully better sounding parts. It’s still a huge challenge to synergize all the parts into a coherent, balanced, and satisfying speaker. Then there’s the critical element of finding components that will reveal the better parts of the more expensive speaker. Throwing Magico, Wilson, or Focal speakers on an generic 50 watt receiver isn’t likely to impress anyone.