Round Audio Subwoofer Driver Price:US$63.69 http://www.dinodirect.com/subwoofer-driver-round-audio.html http://img1.qdw.lefux.com//images/AL...0815173117.JPG Specifications: Height: 9.5cm/3.7in Panel Diameter: 14.3cm/5.6in Magnets Diameter: 9.5cm/3.7in Magnets Height: 4.8cm/1.8in Diagonal Screw Pitch: 13.3cm/5.2in Subwoofer Hole Diameter: 12.5cm/4.9in Voice Coil Width: 1cm/0.4in Magnet Gap Height: 0.5cm/0.2in Impedance: 8Ω Resonance Frequency: 49Hz Rated Power: 35W Maximum Power: 70W Response Rate: 87dB DC Impedance: 6.5Ω BL: 7.7N/A Compliance: 1000uM/N Tuning Frequency: 52Hz Color: Black Professional 12inch Cone Open Woofer Subwoofer Speaker Price:US$112.39 http://www.dinodirect.com/speaker-12in-woofer-mdd127519.html http://img1.qdw.lefux.com//images/Up...5191141452.JPG Specifications: Resonance Frequency: 35Hz Frequency Response Deviation: 94db Impedance: 6 Ω Power: 350W Total Value: 0.42Qts Frequency Response: F0-2850Hz Equivalent Volume: Vas Vibration quality: Mms Material: Aluminum Speaker: 12in Magnets Diameter: 190mm/7.5in Voice Coil Diameter: 75mm/3in Yahoo!: fengni92@yahoo.com MSN: ninafeng0723@msn.cn ICQ: 643020306 Skype™: ninafeng0723