PowerBass OE-400 4" midrange car speakers — designed to replace 2-ohm factory speakers at Crutchfield
PowerBass OE-693 6" x 9" 3-way Speakers (2-ohm) | eBay
Amazon.com: H YANKA 10 Inch Subwoofer - 10 Inch Paper Cone Subwoofer Car Audio, Black Steel Basket, Dual Voice Coil 2 Ohm Impedance 10 subwoofer, 1200W MAX Power 10 inch Competition Subwoofer : Electronics
Amazon.com: DS18 ZXI-654 6.5" Car Audio Coaxial Car Speakers with Built in Neodymium Tweeter and Kevlar Cone 2 Way 240 Watts Max 4 Ohm - Car Stereo Sound System with Removable Grill (2 Speakers) : Electronics