After quitea bit of researching and auditioning of other small protable speaker systems owned by friends, I was drawn to the 'on tour' speakers after reading their reviews on Amazon's site. I wasn't able to find any friends who had them so bought them 'blind'.
I've had them 2 days now and have thrown just about every type of music through them to see if I could find any weakness in their output quality. In short, I'm staggered at how well this small speaker unit has coped with everything from Pat Metheny to Joe Bonnamassa and Royksopp to Scott Matthews.
The sound quality is full of clarity and depth. I expected them to be a bit tinny by virtue of the 1" speaker size, but no, the sound is rounded and well balanced with a surprising amount of definable bass.
If you are looking for a very high quality, neat, robust, and excellent value for money speaker unit that would be a joy to have on your travels - look no further! You will have stunning music quality no matter where you are.
Incidentally, my audio source was a 30Gb iPod Video.