Don’t be fooled by their cosmopolitan looks. The Digital Block Series Amplifiers provide Massive amounts of Power in a stylish and surprisingly small heat sink. These CEA 2006 Certified amplifiers boast Advanced Digital Power Supply Switching, Matched MOSFET “N” Drive outputs with an advanced Six Way Protection. The Nickel Plated Connectors, 18db Crossovers, 30Hz – Hi-Fi E-Cap Filter, Heavy Duty Power Supply, Noise Rejection Circuit, 2ch/4ch Button, are all mounted in a beautiful brushed aluminum “finless” heat sink with a ﾬ” milled top plate bolted down with “hex bolts”. The four cornered hex bolts unscrew to reveal mounting tubes (see attached pictures) that allows the installer to bolt down the amp for a razor clean installation. Top it off with a soft blue center logo glow with hundreds of “micro” LEDs. Massive Audio “D” Block Series combines “Style, Form, Function and Performance”.