Gary the K4 is not 300 watts peak,,it is true 300 watts..and anyone that has used one in a room that demanded volume will tell you it kicks butt...and the 12" woofer is very capable of a deep bass.[not sub woofer bass]..but maybe as good as that Bose so called sub ..

You should give it a real try...maybe blow some windows out..
BTW" Gary you know as well as anyone the number games when rating power amps ..we know the difference is the SPL..