Assuming that you do, I know a lot of people don't, which I find odd if you're a musician, but anyway .
I grew up listening on my parents hifi. Now, if I'm home then I tend to sit and listen off my macbook via my monitors.
If I'm out then it's through headphones.
I saw this picture on Facebook a day or two ago, which made me smile.
[attachment=213982:10400113_10156629528145707_5481991627852461294_n.png]
I know back in the 60s music, especially Motown, was mixed so it would sound 'good' on a transistor radio's speaker.
In the 80s it was mixed so it would sound good on the little headphones that accompanied Walkmen.
People nowadays seem to listen via the pin-head sized speakers on their iPads. This I find totally baffling.