Amazon.com: P3SD4-8 - Rockford Fosgate 8" 150W RMS Dual 4-Ohm Punch Series Shallow Mount Car Subwoofer : Electronics
Amazon.com: Black Diamond DIA-T15.4D 15" Car Audio Subwoofer 4-Ohm Dvc 2000 Watts (1 Speaker) : Electronics
Amazon.com: Pyle Car Vehicle Subwoofer Audio Speaker - 10 Inch Red Electro-Plated Cone, Red Plastic Basket, 1.5” Kapton Voice Coil, 4 Ohm Impedance, 600 Watt Power, for Vehicle Stereo Sound System - Pyle PLW10RD : Electronics
Amazon.com: Sound Town 15" 450W Raw Woofer Speaker with 4" Voice Coil, 100 oz Magnet, Replacement Woofer for PA/DJ Subwoofer, 4-ohm (STLF-1504-4) : Musical Instruments
Dynavox 165mm Basslautsprecher 4 Ohm, kompaktes Bass-Chassis mit Gummi-Sicke für Selbst-Einbau in Boxen-Gehäuse, für Mittel-und Tieftonwiedergabe, Schwarz, 204206 : Amazon.de: Elektronik & Foto
Amazon.com: GRS 15SSW-4HE 15" High Excursion Super Subwoofer 4 Ohm : Electronics
Amazon.com: Massive Audio SUMMO84S - 8 Inch Car Audio Subwoofer, High Performance Subwoofer for Cars, Trucks, Jeeps - 8" Subwoofer 400 Watt RMS, 800w MAX Dual 4 Ohm, 2 Inch Voice Coil. Sold Individually : Electronics
Amazon.com: Lanzar 6.5” Car Subwoofer Speaker - Black Non-Pressed Paper Cone, Aluminum Voice Coil, 4 Ohm Impedance, 600 Watt Power and Foam Edge Suspension for Vehicle Audio Stereo Sound System - MAXP64 : Electronics
Amazon.com: 5 CORE 10 Inch Subwoofer 85W RMS Full Range Pro Audio Speaker 4 Ohm Car Subwoofers 1” CCAW Voice Coil Sub Woofer w 23 oz Magnet for Car RV DJs Home