The TR, though not as good as other laptops, blows away my old VAIO SR in terms of speaker quality. The physical placement helps a lot, as above the screen pointed at you works better than at the front of the palmrest.
The TR does sound better with the bass boost on, especially through headphones, but you can also add some bass back through the Advanced Sound Options if you turn it off. I just have the TR hooked up to external speakers at home and use earbuds on the go, so it all works out.