The best currently available mobile bluetooth speaker (caution: you'll have to pay for quality)

[secondandonly]

If you're using the Jambox you're just using it for the marketing. There's a better option out there.
It has AptX, a noise cancelling speakerphone with controls on the speaker itself, and one of the smallest enclosures on the market.
If you haven't already, check out my review of the foxL v2 mobile bluetooth speaker from soundmatters

if none of this convinces you, how about the simple fact that the creator of the speaker was literally a rocket scientist.