Amazon.com: Rockford Fosgate R2SD4-10 10 inch 800 Watt 4 Ohm Subwoofers (2 Pack) and Q Power QTW10 10 inch Single Sealed Car Audio Subwoofer Box Enclosure (2 Pack) : Electronics
Amazon.com: KICKER 44VCWC124 CompC 12 Inch 600 Watt 4 Ohm Compact Vented Loaded Thin Profile Car Audio Subwoofer Enclosure Box with Ported Design : Electronics
Amazon.com: Rockford Fosgate R2D4-12 12" 1000W 4 Ohm Subwoofers (Pair) + Dual Vented Sub Box : Electronics
Amazon.com: Fosi Audio BT20A Bluetooth 5.0 Stereo Audio 2 Channel Amplifier Receiver and Box X1 MM Phono Preamplifier : Electronics
Amazon.com: AudioPipe TXX-BDC4-12 12 Inch 2,200 Watt High Performance Powerful 4 Ohm DVC Vehicle Car Audio Subwoofer Speaker System, Black (2 Pack) : Electronics
Amazon.com: uxcell 10W 4 Ohm 3 Inch 78x78x39mm Anti-Magnetic Speaker Tweeter Speakers 2pcs : Electronics
Amazon.com: BOSS Audio Systems CX122 1400 Watt Car Subwoofer, 12 Inch, Single 4 Ohm Voice Coil, 12 inch subwoofer Box Ready : Electronics
Amazon.com: ORION Cobalt CO525C 5.25” 4 OHM 2-Way System 50 Watts RM Coaxials Series CO Speakers Car Audio Stereo Set of 2 Speakers : Electronics
Amazon.com: Skar Audio SDR-10 D4 10" 1200 Watt Max Power Dual 4 Ohm Car Subwoofer : Electronics
Amazon.com: ALPHASONIK AS10DF 10 inch 1200 Watts 4-Ohm Down Fire Shallow Mount Flat Enclosed Sub woofer for Tight Spaces in Cars and Trucks, Slim Thin Loaded Subwoofer Air Tight Sealed Bass Enclosure :
Amazon.com: QPower QBOMB12V Dual 12" Vented Ported Sub Box & Bedliner Spray with Boss Audio P126DVC Phantom 12" 2300 Watt Max Power 4 Ohm DVC Car Audio Subwoofer : Electronics
Amazon.com: Kicker 44CWCD104 Dual 4-Ohm Car Subwoofer Sub Bundle with dB11 RMS Car Amp and Remote, Single Box Kit: Wire,Screws,Spades, RSV10 Single Vented Subwoofer Box and RWK81 Amp Wire Kit with RCA (
Amazon.com: Ciglow Full Range Speaker, 3 Inch 4ohm 5W Mini Full Frequency Audio Speaker Loudspeaker Home Stereo Woofer Loudspeaker for Multimedia Sound Box DIY. : Electronics
Amazon.com: Pyramid BNPS122 12" 1200W Car Audio Speakers with Neon Accent Lighting and 4 OHM Impedance, Subwoofer Box, 1500W Mono Amplifier, & Amp Kit : Electronics
Amazon.com: WEIJ 10W 4 Ohm External Magnet Speaker Loudspeaker 75mm x 30mm 2Pcs : Electronics
Amazon.com: BOSS Audio AVA-6200 80 Watt 3-Way 4-Ohm Car Audio Box Speakers AVA6200 (4 Pack) : Electronics
Amazon.com: KICKER 2 43C124 12" 600W Car Audio Subwoofers Subs 4 Ohm + Dual Sealed Sub Box : Electronics
Amazon.com: Rockville K5 W15K5S4 15" 2000w 4 Ohm Car Audio Subwoofer Sub 500w RMS CEA Rated! Bundle with Rockville RGS15 Single 15" Sealed Car Sub Enclosure Box & Enclosure Installation Kit (3
Amazon.com: Harmony Audio HA-F104 Car Stereo Flatline Series 10" Sub 700W Single 4 Ohm Subwoofer : Electronics
Amazon.com: Kicker Single 10-Inch Comp 4 Ohm 150W Loaded Subwoofer Enclosure Box | 43TC104 : Electronics
Amazon.com: Skar Audio VD-10 D4 10" 800W Max Power Dual 4 Ohm Shallow Mount Car Subwoofer : Everything Else
Amazon.com: Kicker Bundle Compatible With Universal Vehicle 44CWCD124 12" Dual 4Ohm 12" With 46CXA4001 800W Sub Amp AND 112VH 12" Sub Box : Electronics
Amazon.com: KICKER 43VC124 Comp 12" Subwoofer in Vented Sub Box Enclosure, 4 -Ohm Bundle with Rockville RWK81 8 Gauge Amp Installation Kit and RXA-T1 Car Stereo Amp : Electronics
Amazon.com: KICKER Comp 12" (30cm) Subwoofer in Down Firing Encl, 4-Ohm; RoHS Compliant : Electronics
