Buy Fredo Subwoofer (Box of 2) 4 inches. 4 Ohms/ 35 Watts/Foam Cone 35 W Home Theatre Online from Flipkart.com
WOOFER Speaker 5" 35 WATTS @ 8 OHMS | eBay
Akuhiru CH-W801 8 Inches Woofer Bass Emphasis Paper Cone Maximum Input 370 W Impedance 4Ω Reproduction Frequency 35 To 8000 Hz Weight 2.3kg | Sub Woofer Speakers | Croooober
Sony SA-W303 35 Watt Powered Subwoofer - WORKS GREAT Awesome Sound! | eBay
Amazon.com: PYLE PLW10BL 10-Inch 600 Watt Subwoofer, Red : Electronics