Man, do they ever run out of energy when they're under 4? Nope. :) We had some friends over for dinner. They thought my acoustic panels were something that I built for decorative purposes. Needless to say we had a quick talk about the difference you would hear barking at a panel and barking at a wall ... no demonstrations though. :D I got to show off the Bach cantatas, Tom Jones and Bronski Beat. Around here my 2 systems don't win any prizes but 'normal' people are impressed if you can hone in on their choice of music.