For-x X8-D2 subwoofer da 20cm 2 bobine da 2 ohm 500 watt rms 1500 max – Audioevolutionhifi
Alpine SWX-1043D Type-X 10" subwoofer with dual 4-ohm voice coils at Crutchfield
ELITE X 15 – shokindustries
Dayton Audio MX10-22 10" Max-X High Excursion DVC Subwoofer 2 Ohms Per Coil
Amazon.com: BOSS Audio Systems CXX10 Chaos Exxtreme Series 10 Inch Car Subwoofer - 800 Watts Max, Single 4 Ohm Voice Coil, Hook Up to Amp : Electronics
For-X X-112S Subwoofer
Gladen X-MAXX 15 low bass long throw subwoofer 38cm
Amazon.com: Sundown Audio X-18 V.2 D4 18" 1500W RMS Dual 4-Ohm X V.2 Series Subwoofer : Electronics
Sundown Audio Xv3 8" inch DVC Dual 2 Ohm 800 Watt (X Series) Car Subwoofer