Model : ALX-7575XQ Detail : 150mm x 230mm (6�x9�) 3-way Titanium Loudspeakers � Frequency Response: 45Hz ~ 22,000Hz � Sensitivity: 92dB/w*m (SPL) � Norminal Impeadance: 4 Ohms � Peak Power Input: 400 Watts � Recommended amplif.: 5-75 rms