If you insist on the deepest loudest bass - the 1530 is the best choice for your system. These massive 3/4" thick MDF cabinets house a heavy-duty 15" woofer with a high temperature voice coil for extremely deep bass you can feel. Ferrofluid cooled tweeters and a well-engineered mid-range driver recreate smooth vocals and clean highs, combining all the virtues of the 1230 tower with even greater output. The 1530 towers are an exceptional value priced at about the same as 8" or 10" woofer models from most other brands. In fact, RtR guarantees bass output of the 1530 will surpass the bass output of comparably priced Cerwin Vega, JBL, or DCM models! The 1530 is equipped with built-in power protection circuitry and is ideal for music or surround sound.