Massive Audio MX Series 4-Inch 40-Watt-RMS 2-Way Coaxial Speakers in the Mobile Audio department at Lowes.com
Polk Audio DB1242SVC 12” 1110 Watt Single 4-Ohm Car Audio Subwoofer Sub+Speaker | Audio Savings
4 INCH SUBWOOFER with Powerful Bass 40 Watt Price: Buy 4 INCH SUBWOOFER with Powerful Bass 40 Watt Online in India -Amazon.in
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
DE525-01 Woofer 5.25" 4Ohms 50 Watts (2 Pcs)
Current Audio SB65 40 Watt Amplified Soundbar & Wireless Subwoofer Electronics - Zavvi US