Here are some of the features of the Legacy LS51KT:
5.25'' Midrange Speaker
High Power Blue Injected P.P. Cone
Specially Treated Black Rubber Edge
Magnet Structure Weight: 30 oz.
High Temperature Aluminum Voice Coil
1'' Neodymium dome Tweeter
2-Way Crossover Network Aluminum
Power Handling: 240 Watts Rated Power
Frequency Response: 60Hz-6k Hz
Impedance: 4 Ohms
SPL 86 dB
Mounting Depth: 1.88''