Amazon.com: Focal ES 165 K2 6-1/2" K2 Power 2-Way 2-Ohm Component Speakers : Electronics
PowerBass OE-402 4" 2-way car speakers — designed to replace 2-ohm factory speakers at Crutchfield
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)
Hifonics Zeus 200 Watt 5.25 Inch 2 Way 4 Ohm Car Audio Coaxial Speaker, Pair, 1 Piece - Baker's