Audio Subwoofer Speaker 4 inch 30 W 8 ohm Woofer For Midrange Bass Computer Speaker

The rated impedance:8ohm plus or minus 15%
Long-term maximum power: 30 W
Diameter size: 105mm
The pitch of diagonal size: 115mm
Net weight:0.38kg
Resonance frequency:40Hz

Audio Subwoofer Speaker 4 inch 50 W 8 ohm Woofer For Midrange Bass Computer Speaker, High Quality speaker