Amazon.com: American Bass DX-10 4 Ohm, 300 Watt RMS / 600 Watt Max Power, 10 Inch Subwoofer, 90 oz Magnet, Single, Hi-Temp 4-Layer 2" Voice Coil, White Powder Coated, Non-Pressed Paper Cone : Electronics
American Bass 12" Shallow Mount Woofer 300W RMS/600W Max - 4 Ohm SVC - Walmart.com
Memphis Audio 8" Marine Subwoofer 600W RMS and 1200W Max RGB LED Back-Lit MMJ824 - Walmart.com
DS18 ZXI8.2D 8" Subwoofer | 600W Rms 2-ohm DVC
Power Acoustik 10" Powerful 600W RMS Shallow Car Subwoofer Loud Speaker, Black - Walmart.com
JL Audio 12W6V3-D4 at Onlinecarstereo.com
Amazon.com: Bass Rockers 12" 1200W/ 600W RMS Dual 4 Ohm Car Audio Stereo Sub Subwoofer for Amplifiers Amps : Electronics
NVX 600W RMS 12" Dual 4-ohm Car Subwoofer - SSA STORE