These are such a drastic leap over the previous Bose Sounddock I had. I've been hearing things in recordings of my music that I didn't even know was there. They are jaw-dropping and head-shaking awesome! The bass from these little guys is mighty, especially considering they're only 10x8x6 inches in size. These are designed for near field listening but can fill up a small to medium sized room quite amply. Proper placement will give an optimum soundstage. There is an output for sub woofer if you feel these don't put out enough but just you wait and listen.You can feed your music in a number of ways. Analog and digitally via 3.5mm jack for the former and optically, coax, USB, Bluetooth, and Apple Airport Express for the later. There are bass and treble knobs on the back of the powered speaker that helps tune the speakers to their placement.
I've now had these for 3 weeks in my tractor. They sit up in the top storage area behind the driver and passenger seats. It's not the best setup for me to take advantage of the soundstage but I utterly enjoy them regardless. I'm thinking about making some alterations to the storage space so that the sound is projected more towards the front of the cab. SSSSShhh! Don't tell my boss.
If you're in need of compact and amazing sounding speakers, I highly recommend the Vanatoo Transpartent Ones. Here's some links for extra reading and convincing. http://www.vanatoo.com/