These CAT MBC-313B 3-way bass reflex column speakers feature a high-quality modern 3-way technology Each box has 3 built-in speakers Bass reflex tubes are attached at the back, this creates an extremely strong bass. The wooden body, oak with structure, provides a rich, low-loss, unsurpassable sound experience. The boxes feature a tweeter, a midrange driver, a large woofer, and a bass reflex tube fixed on the back. Front covers are detachable. Robust high-quality metal raw cable connectors for the speakers. Transmission range: 28Hz-22.000 KHz High pulse loading capacity: 380 watts Music power loading capacity: 300 watts Sine capacity: 180 W Impedance: 8 Ω Height: 860 mm Width: 200 mm Depth: 250 mm Weight per speaker: 10.5 Tested, well-maintained, excellent condition