Hey Ron, I'm going try a pair of the 4645B (8 cu. ft.) cabinets with 2242 in my basement setup. The spec sheet says it's tuned for 25Hz. Good starting place, right? Did you run yours with any EQ? What kind of low pass filter should I start with? Yeah, these are to use with Jensen Imperials, which still have the JBL LE15B. Haven't cracked the house foundation yet, so... MOAR BASS!