FWD801 Nominal Diameter: 83 Impedance: 4 or 8© Frequency Range: 52Hz-6KHz Power( RMS) : 100W Sensitivity: 91dB/ W/ m FWD1001 Nominal Diameter: 103 Impedance: 4 or 8© Frequency Range: 52Hz-6KHz Power( RMS) : 200W Sensitivity: 95dB/ W/ m FWD1201 Nominal Diameter: 123 Impedance: 4 or 8© Frequency Range: 35Hz-3KHz Power( RMS) : 300W Sensitivity: 98dB/ W/ m FWD1501 Nominal Diameter: 153 Impedance: 4 or 8© Frequency Range: 35Hz-3KHz Power( RMS) : 400W Sensitivity: 98dB/ W/ m