From J&R Music and Computer World Jensen JS43 - Music by nature cannot be confined to any one point in space, and we shouldn't try! Instead, put speakers at every location where you spend time during the day. An effective, affordable means to this end that does not consume undue amounts of living space is the Jensen JS43 system. Speaker Details: 3/4" Piezo dome tweeter 2" Moisture resistant polycone midrange 4" Polypropylene woofer Non-removable mesh grill Black plastic enclosure Frequency Response: 90Hz - 18Hz +/- 3dB Sensitivity: 90dB, (2.83V/1 meter) Nominal Impedance: 4-6 ohms Power Handling: 48 Watts Included Hardware: (2) U-brackets & 4 threaded knobs