We must therefore play with the speaker's location to recover a little bass (close to a wall or in a etagère biblio).
Put side by side with his great rival B. there is no picture. The Boom is much clearer and more crystalline than its competitor. The spherical dispersion also provides its less directive that small portable rectangular enclosure B.
Finally the volume, there is no comparison. We must set the iphone to one third of his to be at its maximum concurrent!
The only positive point of the B face of this boom is a more rounded and better in bass.
After it is a matter of taste, power and clarity or serious a modest volume .. I chose this place!