My angst over this is long gone but what I see are 21 drivers and not 21 speakers. Speakers consist of one or more drivers to provide the full range of sound. Most speakers are either two- or three-way in that they have two or three drivers to provide the full spectrum of audible sound. Given that distinction, there are not 21 speakers in the Air with SSP. That notwithstanding, once I got my sound system upgraded (removing something from the woofers), the bass response improved significantly. All in all, I love my Air Touring.