Epic Grand Master 500 The Axiom Epic Grand Master 500 5.1 surround sound speaker system pictured to the left with most of the grilles removed is perfect for filling up average to larger size rooms and great rooms with beautiful sound. Each 2-way Axiom M22 bookshelf speaker (floor stands not included) features three drivers -- dual 5¼" aluminum woofers and a 1" titanium dome tweeter. The voice-matched VP150 center channel speaker and QS8 surround effects speakers blend beautifully and seamlessly with the M22 speakers. The Epicenter EP500 subwoofer's Intelligent DSP controls every frequency from 16 Hz to 100 Hz, maintaining a smooth, flat response within 1.5 dB across the range. That means you'll hear and feel undistorted, profoundly deep rumbles all the way to 13 Hz in typical rooms. You can purchase your Epic Grand Master 500 5.1 home theater speaker system online at Amazon.com.