Barron's AP Environmental Science

Sundown Audio M15 Car Subwoofer – 15" Dual 2 Ohm, 2000W RMS/4000W Peak, 3" Copper VC, 35mm Xmax, Mega Roll Surround, Quad Magnet Motor, Low-Distortion SPL Sub

Sundown Audio E-10 D4 V4 10" 500W RMS Dual 4-Ohm Car Bass Subwoofer

Sundown Audio X v.4 8" Dual 2 Ohm Subwoofer – 1000W RMS, Triple Stacked Magnet, 3" VC, Mega-Roll v.2 Surround, High Excursion 19mm Xmax, Deep Bass Optimized for Small Ported Boxes

Sundown Audio E-12 v4 D2 12" 500W RMS Dual 2-Ohm Car Bass Subwoofer

Sundown Audio U-15 D2 15" 1500W RMS Dual 2-Ohm U-Series Subwoofer

Sundown Audio X-15 v3 D2 Pro 15" Dual 2-Ohm 2000W RMS Bass Subwoofer

Sundown Audio E-8 V.6 D2 8" 300W RMS Dual 2-Ohm EV.6 Series Subwoofer

Sundown Audio U-12 D4 12" 1500W RMS Dual 4-Ohm U-Series Subwoofer