Has it ever crossed your mind that the reason you like your system more than your friend's or the store's is not because yours is better, even if you think it is, but because you're used to the sound of yours and not of theirs? Welcome to product habituation.

Some people, including some audiophiles, believe that product habituation is what's really behind what some people refer to as product break-in. It's not a mechanical or electronic phenomenon, they contend, but a mental one. Assuming the sound of the new gear is of adequate quality, it's the listener that breaks in to the product, as the product's sound, which was initially strange, grows more familiar and, so, right.

I like to think that my musical tastes are pretty eclectic: jazz, pop, blues, Americana, metal, world music, ambient, prog rock, more. Operatic music and classical singing, though? Thanks, I'll pass.

There are exceptions. I find tear-tugging beauty in "Ebben? Ne Andrò Lontana" from Alfredo Catalani's La Wally, whether sung by Donij van Doorn or Wilhelmenia Wiggins Fernandez (footnote 1). The German Lieder of Kurt Weill, as interpreted by soprano Teresa Stratas, produce gladness in my heart but confusion in my uncomprehending wife and children. Maybe it's because the often sarcastic, gruff songs about the travails of the lumpenproletariat contrast with the purity of Stratas's classically trained voice. That clash is precisely what I love about it.