Dual 12 inches   
1. POWER IS 350W*2 ( RMS )   
2.12 INCH PROFESSIONAL SPEAKER. THE WOOFER MAGNET IS 156 MM, VOICE COIL IS 65 MM.4 LAYER. THE TWEETER IS 100 MM MAGNET. WITH CROSSOVER INSIDE.   
3. THE WOOD IS 1.5 CM


Dual 15 inches
1. POWER IS 600W*2 ( RMS ) 
2. 15 INCH PROFESSIONAL SPEAKER. THE      WOOFER MAGNET IS 170 MM, VOICE COIL IS 75 MM. 4 LAYER. THE TWEETER IS 120 MM   MAGNET. WITH CROSSOVER INSIDE. 
3. THE WOOD IS 1.5 CM.