Kicker Motorcycle 5.25 inch and 6x9 Speaker package 2 ohm version. - Walmart.com
Amazon.com: BLACK DIAMOND DIA-69.3 6 x 9 Coaxial Car Speakers 3 -Way 270 Watts 4-Ohm Car Audio Stereo System 6x9 Speakers - Removable Grill Included (Sold in Pairs) : Electronics
PowerBass OE-692T 6"x9" 2-way car speakers — designed to replace 2-ohm factory speakers at Crutchfield