The AS-B2 is a 2-way bookshelf speaker design that provides deeper and more bass output than the AS-B1 due to its larger enclosure and 6-1/2" Injection Molded Polypropylene woofer. Like all athena TECHNOLOGIES™ AUDITION series speakers, the AS-B2 features athena TECHNOLOGIES high powered 1" Teteron dome tweeter. Clear, distortion free mids and highs, with tight deep bass response. Able to handle up to 150 watts of amplification, and with bass all the way down to 50Hz, amazing for a bookshelf sized speaker! Just wait until you hear the AS-B2 and see the price, you won't believe your eyes, or your ears!