Amazon.com: Alpine SPS-517 5" x 7" 2-Way Type-S Series Coaxial Car Speaker : Electronics
Alpine R-Series 6 x 8" Coaxial 2-Way Speakers (Pair) R-S68
Alpine SPE-6000 Type-E Series 6-1/2" 2-way car speakers - Breakers Stereo and Performance
Customer Reviews: Alpine R2-S65 Next-Generation R-Series 6-1/2" 2-way car speakers at Crutchfield
Alpine CDE-150E Single DIN CD Player USB AUX Radio Stereo Car Audio Receiver Bundle Combo with 2 Pairs (QTY 4) of 6x9" Multiaxial 3-Way 400W Peak Power Car Audio Speakers, 16 Gauge
Alpine R-Series 6x9" 2-Way Hi-Resolution Component Pro Car Speakers with Glass Fiber Reinforced Cone (Pair) Black R2-S69C - Best Buy