This video isn’t the most definitive comparison of the speakers on the most recent BlackBerry devices, but it does give you an idea of the subtle differences between them.
The Bold seems to have the best sound, while the 8900 seemed the loudest. The Storm seemed to be very treble-intensive, but it is a YouTube video which tends to distort sound considerably.
The Tour’s speakers gave the music a deeper, more bass-heavy sound, comparable to that of the Bold. Overall, I would give the Bold the best rating, with the Tour a close second. After that the 8900 and then the Storm.
What do you think?