Amazon.com: KICKER 47KSC41004 KS Series Low Profile 4x10 Inch 4 Ohm 15 to 75 Watts RMS Power Factory Replacement Coaxial Car Audio Sound System Speakers (Pair) : Electronics
Kenwood KFC-415C 4x10-Inch 160W Two-way Custom-fit Car Audio Speakers, Pack of 2 - Walmart.com
Pioneer TS-A4103 4"x10" 2-way car speakers at Crutchfield
Kicker Speaker Bundle - Two pairs of Kicker 4x10 Inch KS-Series Speakers 44KSC41004 - Walmart.com
The Best 4x10 Speakers Get Your Stereo Sounding Better - AutoGuide.com