Logitech Z407 - Speaker system - for PC - 2.1-channel - wireless - Bluetooth - USB - 40 Watt (total) | Dell USA
THUNDER Series 4" x 6" 4Ω Coaxial Speaker Pair | MTX Audio - Serious About Sound®
SUBWOOFER 4 Inch / Hi End DIY / 4 ohm 40 watt - YouTube
Amazon.com: 5 CORE 4 inch Speaker Driver 40W 4Ohm Replacement Full Range Audio Stereo Dual Cone Concept for Extra Crisp Sound Made in India (Pair) : Electronics
Current Audio SB65 40 Watt Amplified Soundbar & Wireless Subwoofer Electronics - Zavvi US
Source 40 Watt RMS deep Bass BT 2.1 CH Computer Home Subwoofer Speaker with Remote on m.alibaba.com