Massive Audio TKO12S4 TKO Series. 12 Inch, 600 Watt, 8mm Top Plate, Single 4 Ohm Car Subwoofer. Sold Individually.
Alpine R-W10D4 Type R 10" Dual 4 OHM Subwoofer with GTR-601 Mono Subwoofer Amplifier 600 watts RMS x 1 at 2 ohms - Creative Audio
JL Audio 10W6v3-D4 with XD600/1v2 600 Watt Subwoofer Kit: 10W6v3-D4-XD600-1
Amazon.com: Lanzar 8in Car Subwoofer Speaker - Black Non-Pressed Paper Cone, Stamped Steel Basket, 4 Ohm Impedance, 600 Watt Power and Rubber Suspension for Vehicle Audio Stereo Sound System - MAX8 (1 pack) : Electronics
Pyle Pltab122 12 Inch 600 Watt Enclosed Carpeted Cylindrical Tube Vehicle Car Audio Subwoofer Speaker Sound System With Built In Amplifier : Target
Boss Audio MR101 10" 600-Watt Single Voice Coil Marine Subwoofer
Rockville RVP12W4 600 Watt 12" Raw Replacement DJ PA Subwoofer 4 Ohm Sub Woofer
Skar Audio - VD-8 | 8" 600 Watt Max Power Subwoofer (Shallow Mount)
Amazon.com: Pyle 8-Inch Low-Profile Amplified Subwoofer System - 600 Watt Compact Enclosed Active Underseat Car Audio Subwoofer with Built in Amp, Powered Car Subwoofer w/Low & High Level Inputs PLBX8A : Electronics
Kicker CompC 44DCWC122 600 Watt RMS Dual 12 inch Subwoofer Enclosure - Single 2 Ohm Voice Coil
Crossfire Audio C5-V3 15" inch DVC D2 Ohm (C5 Series) Car Subwoofer 600 Watts RMS
PYLE 6" 600W Max Dual Voice Coil 4-Ohm Car Stereo Audio Subwoofer (12 Pack) 12 x PLPW6D - The Home Depot
DS18 Elite Z6 6.5 Inch Subwoofer 600W Max 300W Rms Dual Voice Coil 4 + 4 Ohms - Walmart.com