HSR163-5TH Load rating: 5W transformer tappings at 100V: 5- 2.5 -1.25 W frequency range: 180-15KHZ SPL(@1W/M) : 90DB Speaker and impedance:5"/8ohms Dimension,install depth(max):Φ158(81mm) Color: whiteHSR163-6TH Load rating: 10W transformer tappings at 100V: 10-5 -2.5 W frequency range: 150-15KHZ SPL(@1W/M) : 92DB Speaker and impedance:6.5"/8ohms Dimension,install depth(max):Φ210(91mm) Color: white