Pioneer TS-A1688S 

• GRADE: A Series
• Size: 16.5 cm (6.5")
• Maximum Music Power: 350 W
• RMS: 80 W
• Magnet Weight: 320 g
• Magnet Size: Φ80 X 17
• Frequency Response: 35 Hz to 29 kHz
• Sensitivity: ( 1W / 1m )91 dB
• Impedance: 4Ω
• Mounting Depth: 59 mm
• Cut-Out Dimensions: ø 144 mm