Amazon.com: Harmony Audio HA-R104 Car Stereo Rhythm Series 10" Sub 500W Single 4 Ohm Subwoofer : Electronics
Amazon.com: Rockford Fosgate PPS4-6 6.5" 800W 4-Ohm Impedance Mid-Range Car Speakers 4 Pack with Fiber Reinforced Paper Cone and Stamp Cast Aluminum Frame : Electronics
Amazon.com: Fielect 4Pcs 5W 4 Ohm DIY Magnetic Speaker Audio Speakers 77mm Diameter Round Shape Replacement Loudspeaker : Electronics
Amazon.com: (2) Skar Audio FSX10-4 400-Watt 10-Inch 4 Ohm MID-Range Loudspeakers - 2 Speakers, (2) FSX10-4 : Electronics
Amazon.com: Skar Audio IX-10 D4 10" 400 Watt Max Power Dual 4 Ohm Car Subwoofer : Electronics
Amazon.com: Rockford Fosgate P3D4-12 Punch P3 DVC 4-Ohm 12-Inch 600-Watt RMS 1200-Watt Peak Subwoofer : Electronics
Amazon.com: Visaton FRS7-4 2.5" Full-Range Speaker 4 Ohm : Electronics
Amazon.com: PRV AUDIO 6.5 Inch Speakers Midbass Woofer 6MB200-4 v2 200 Watts Program Power, 4 Ohm, 100 Watts RMS, 1.5 in Voice Coil, Perfect for Small Custom Enclosures for Pro Car Audio
Amazon.com: GRS 3FR-4 Full Range 3" Speaker Driver 4 Ohm : Electronics
Amazon.com: American Bass XR15D4 15 3000 Watts Dual 4 Ohm 3 Voice Coil : Electronics
Amazon.com: Timpano 6.5” Shallow Midrange Speaker 4 Ohm 500 Watts Max Power Pro Audio Loudspeaker (1 Speaker) : Electronics
Amazon.com: Audiopipe TXX-BDC4-10 Subwoofer Quad Stack 10 Inch 1800 Watt High Performance Powerful 4 Ohm DVC Vehicle Car Sub Audio Subwoofer Speaker System, Black : Electronics
Amazon.com: uxcell 10W 4 Ohm 3 Inch 78x78x39mm Anti-Magnetic Speaker Tweeter Speakers 2pcs : Electronics
Amazon.com: KICKER (4) 46CSC674 6.75" 6-3/4" 600w 4-Ohm Car Audio Coaxial Speakers CSC674 : Electronics
Amazon.com: Pyle 6.5 Inch Mid Bass Woofer Sound Speaker System - Pro Loud Range Audio 300 Watt Peak Power w/ 4 Ohm Impedance and 60-20KHz Frequency Response for Car Component Stereo PLG64,Yellow : Electronics
Amazon.com: Pyramid 6.5 Inch Car Woofer Speaker - 300 Watt High Powered White Injected Polypropylene Cone Car Audio Sound Component Speaker System w/ High-Temperature Kapton Voice Coil, 4 Ohm, 40oz Magnet - WX65X : Electronics
Amazon.com: Pyle 4 Channel Marine Amplifier - Compact Power 400 Watt RMS 4 OHM Full Range Stereo & Waterproof - Wireless Bluetooth Receiver Audio Speaker with LCD Digital Screen - PFMRA440BB : Electronics
Amazon.com: Massive Audio GTX64 – 6.5 Inch Car Audio Subwoofer, High Performance Subwoofer for Cars, Trucks, Jeeps - 6.5" Subwoofer 250 Watt RMS, 500w MAX Dual 4 Ohm, 1.5 Inch Voice Coil. Sold Individually : Electronics
Amazon.com: Skar Audio FSX65-4 6.5" 300 Watt 4 Ohm Pro Audio Midrange Loudspeaker, Each : Electronics
Amazon.com: Facmogu 2PCS 5in Full Range Speaker Drivers, RMS 30W MAX 50W 4 Ohm, HiFi Wide Range Audio Driver Loudspeaker Replacements, DIY Car Vehicle Audio Speakers Bass Woofer Tweeters - Red : Electronics
Amazon.com: Gikfun 2" 4Ohm 3W Full Range Audio Speaker Stereo Woofer Loudspeaker for Arduino (Pack of 2pcs) EK1725 : Electronics
Amazon.com: Alpine W12S4 12-inch Single 4 Ohm Subwoofer Bundle : Electronics
