Alpine W12S4 12" 250 Watt 4 OHM Subwoofers with GTR-601 Mono Subwoofer Amplifier 600 watts RMS x 1 at 2 ohms - Creative Audio
Subwoofers and Amplifiers – Let's Talk About Ohms and Loads
Amazon.com: BOSS Audio Systems R1100M Riot Series Car Audio Subwoofer Amplifier - 1100 High Output, Monoblock, Class A/B, 2/4 Ohm Stable, Low/High Level Inputs, Low Pass Crossover, Mosfet Power Supply, Stereo :
Rockford Fosgate Power T1D212 12" dual 2-ohm voice coil component subwoofer and Rockford Fosgate Power T750X1bd Compact mono subwoofer amplifier — 750 watts RMS x 1 at 1 to 2 ohms and a SOTS Lanyard
Kicker Car Audio 10" Sub System CVR10 Dual 2 Ohm Subwoofer Pair, DX500.1 Amp & Install Wire Kit - KICKERUMAP211