Amazon.com: Dayton Audio DCS165-4 6-1/2" Classic Subwoofer 4 Ohm : Electronics
Amazon.com: Kenwood Excelon P-XW1002B 10" Subwoofer with Sealed Down-Firing Enclosure | 10" 4-ohm subwoofer : Electronics
Amazon.com: BOSS Audio Systems MC900B Amplifier for ATV UTV Car Marine - 500 High Output, 4 Channel, 2/4 Ohm, Bluetooth Multi-Function Remote, RCA Out, Weatherproof, Use Amp with Stereo and Subwoofer, Crossover : Electronics
Amazon.com: BOSS Audio Systems R1100M Riot Series Car Audio Subwoofer Amplifier - 1100 High Output, Monoblock, Class A/B, 2/4 Ohm Stable, Low/High Level Inputs, Low Pass Crossover, Mosfet Power Supply, Stereo :
Amazon.com: Kicker 47TRTP122 Car Audio Down Firing 12" Thin Sub Box Passive Radiator Bundle with Harmony HA-A400.1 Amplifier & Amp Kit : Electronics
Kicker 44TCWC104 CompC 10" Truck Sub Box Enclosure 4 Ohm
Amazon.com: Rockville VS12K54 12" K5 1400w Car Subwoofer in Vented Sub Enclosure Box - 4 Ohm : Everything Else
Amazon.com: Kenwood KFC-W3041 12" 4 Ohm 2000W Car Subwoofer (Single) with Gravity Magnet Phone Holder Bundle : Electronics
Amazon.com: Kicker VCWC124 CompC 12" Subwoofer in Vented Enclosure 4-Ohm : Electronics
Amazon.com: American Bass Competition 12" 3000 Watt Dual 4 Ohm Subwoofer Hawk 1244 : Electronics
Amazon.com: Gikfun 2" 4Ohm 3W Full Range Audio Speaker Stereo Woofer Loudspeaker for Arduino (Pack of 2pcs) EK1725 : Electronics
Amazon.com: Alphasonik AS8DF 8 inch 600 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: 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: Soundstream Twt.5 1 110w Pie Dome Tweeters 4 Ohm, Model: TWT.5, Electronics & Accessories Store : Electronics
Amazon.com: (2) Kicker 44CWCS124 CompC 12" 600 Watt Single 4-Ohm Car Subwoofer Bundle with Dual Sub Box Enclosure Installation Kit and Rockville RD12 Dual MDF Sealed Subwoofer Enclosure (4 Items) : 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: Two Notes Torpedo Captor Reactive Loadbox DI and Attenuator - 4 Ohm : Musical Instruments
4 Inches Heavy Duty Waterproof Boat Marine Box Outdoor Speakers Surface Mounted for Skid Steer ATV UTV RZR Golf Cart Tractor Powersports Boat Truck Jeep
Amazon.com: 2) ROCKFORD FOSGATE P1S4-10 10" 1000 Watt 4-Ohm Subwoofer + Dual Vented Sub Box : Electronics
Facmogu 3 inch Tweeter Speakers HiFi Full Range Woofer Loudspeaker, 2 PCS 4 Ohm Anti-Magnetic
Amazon.com: Jensen MOD12-70 12" 70 Watt Guitar Speaker, 4 ohm : Musical Instruments
Amazon.com: Fosi Audio BT20A Bluetooth 5.0 Stereo Audio 2 Channel Amplifier Receiver and Box X1 MM Phono Preamplifier : Electronics
Amazon.com: MB Quart RW-110A 800W Reference Series 10" 4-Ohm Power Subwoofer Amplifier with 8 Guage Kit Red and Gravity Magnet Phone Holder Bundle : Everything Else
Amazon.com: KICKER 43CVR124 COMPVR 800W 12" 4-Ohm DVC Car Stereo Subwoofer Bundle with Rockville RS12 Single Subwoofer Enclosure Box and Single Sub Box Enclosure Installation Kit : Electronics
Amazon.com: Skar Audio VD-12 D4 12" 800W Max Power Dual 4 Ohm Shallow Mount Car Subwoofer : Electronics
