Amazon.com: BOSS Audio Systems CXX12 Car Subwoofer - 1000 Watts Maximum Power, 12 Inch , Single 4 Ohm Voice Coil, Sold Individually,Black : Electronics
CT Sounds MESO-8-D4 1600 Watts Max 8 Inch Car Subwoofer Dual 4 Ohm
Amazon.com: Rockford Fosgate R2D4-10 Prime 4-Ohm DVC 10” Subwoofer 250 Watts RMS / 500 Watts Max : Electronics
Amazon.com: Rockford Fosgate P3D4-12 Punch P3 DVC 4-Ohm 12-Inch 600-Watt RMS 1200-Watt Peak Subwoofer : Electronics
Amazon.com: uxcell 3W 4 Ohm Metal Housing Round Magnet Speaker Loudspeaker 2Pcs : Electronics
Amazon.com: GRS 3FR-4 Full Range 3" Speaker Driver 4 Ohm : Electronics
Amazon.com: Fielect 4Pcs 5W 4 Ohm DIY Magnetic Speaker Audio Speakers 77mm Diameter Round Shape Replacement Loudspeaker : Electronics
Amazon.com: 1.5” Audio Car Tweeter Speaker - Aluminum Die-Cast Frame, 500 Watt Peak, 2 kHz - 25 kHz Frequency Response, 4 Ohm, Heavy Duty 30 oz. Magnet Structure - Pyle PDBT31 SILVER : Electronics
uxcell a16092100ux1151 5% 200W 4 Ohm Wirewound Aluminum Housed Clad Resistor Gold Tone, 2.009998" Width, 3.94" Length: Amazon.com: Industrial & Scientific
Amazon.com: uxcell 3W 4 Ohm DIY Speaker 50mm Round Shape Replacement Loudspeaker 2pcs : Electronics
Amazon.com: AudioPipe TXX-BDC4-12 Dual 4 Ohm 12 inch 2,200 W Car Speaker Subwoofer, Black (4 Pack) : Electronics
Amazon.com: Dayton Audio ND105-4 4" Aluminum Cone Midbass Neo Driver 4 Ohm : Electronics
Amazon.com: Dayton Audio DAEX30HESF-4 High Efficiency Steered Flux Exciter with Shielding 30mm 40W 4 Ohm : Electronics
5pcs 4 ohm 4RΩJ 10 watt Axial Ceramic Cement Power Resistor 10W: Amazon.com: Industrial & Scientific
Amazon.com: Dayton Audio DCS165-4 6-1/2" Classic Subwoofer 4 Ohm : Electronics
Amazon.com: Facmogu 2PCS 8in Full Range Audio Speakers, RMS 50W Peak 120W, 4 Ohm Car Vehicle Audio Full Range Drivers, Wide Range DIY Loudspeaker Woofer Replacement - Red : Electronics
Amazon.com: CT Sounds STRATO-10-D4 2500 Watts Max 10 Inch Car Subwoofer Dual 4 Ohm : Everything Else
Amazon.com: Gikfun 4Ohm 40mm Diameter 3W Full Range Audio Speaker Stereo Woofer Loudspeaker for Arduino (Pack of 2pcs) EK1794 : Electronics
Amazon.com: Gikfun 2" 4Ohm 3W Full Range Audio Speaker Stereo Woofer Loudspeaker for Arduino (Pack of 2pcs) EK1725 : Electronics
Amazon.com: Skar Audio IX-12 D4 12" 500 Watt Max Power Dual 4 Ohm Car Subwoofer : Electronics
Amazon.com: Fielect 2Pcs DIY Magnetic Speaker 3W 4 Ohm Full Range Audio Speaker Stereo Woofer Loudspeaker Replacement for Arduino, 52mm Diameter : Electronics
Dayton Audio DAEX32EP-4 Thruster 32mm Exciter 40W 4 Ohm
Amazon.com: Rockville RVW1800P4 1800w Raw DJ Subwoofer 4 Ohm Sub Woofer 107OZ Magnet, 18" : Electronics
Amazon.com: PRV AUDIO 8 Inch Midbass Speaker 8MB450-4 v2, 450 Watts Program Power, 2 in Voice Coil, 4 Ohm, 225 Watts RMS Pro Audio Mid Bass Woofer (Single) : 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) : Everything Else
