Amazon.com: Rockford Fosgate R2D4-12 Prime R2 DVC 4 Ohm 12-Inch 250 Watts RMS 500 Watts Peak Subwoofer : Everything Else
Amazon.com: PRV AUDIO 6MB100-4 Pair of 6.5 Inch Midbass Speaker for Pro Car Audio, 4 Ohm, 50 Watts RMS Power, 200 Watts Max Power Mid Bass Factory Replacement Loudspeaker (Pair) : Electronics
2) Skar Audio FSX8-4 350-Watt 8-Inch 4 Ohm MID-Range Loudspeakers - 2 Speakers
Amazon.com: Gravity 15 Inch 1600 Watt Car Audio Subwoofer w/ 4 Ohm DVC Power (Single) : Electronics
Amazon.com: Pyle Home Marine Car Amplifier - 4-Channel Compact 400 Watt RMS 4 OHM Full Range Monoblock Stereo & Waterproof - Wireless Bluetooth Receiver Audio Speaker w/ LCD Digital Screen (PFMRA450BW) : Electronics
Amazon.com: 4" REPLACEMENT SPEAKER WITH DUAL CONE, 8OZ MAGNET 10 WATTS @ 8 OHMS : Electronics
Speaker - 3" Diameter - 4 Ohm 3 Watt : Amazon.ca: Everything Else
Mini Hobby Speaker - 2 inch 4 Ohms
Amazon.com: MTX TN10-04 10-Inch Single 4-OHM Subwoofer 150-Watt RMS : Electronics
Amazon.com: Audiobank 2X AB-790 6x9 -Inches 1000 Watts Peak Power for Pair and 300 Watt RMS Power 4-Way Car Audio Stereo Coaxial Speakers with 4 Ohm Ohm Impedance / 93dB/1w/1m : Electronics
Amazon.com: Rockford Fosgate R2D4-10 Prime 4-Ohm DVC 10” Subwoofer 250 Watts RMS / 500 Watts Max : Electronics
Amazon.com: BLAUPUNKT GTX620 6.5" 2-Way Coaxial Car Speakers 300 Watts 4 Ohm : Electronics
Amazon.com: Pyle 4'' x 6'' Three Way Sound Speaker System - Pro Mid Range Triaxial Loud Audio 240 Watt per Pair w/ 4 Ohm Impedance and 3/4'' Piezo Tweeter for Car Component
Genius GPRO-M1065 6.5" 300 Watts-Max Midrange Marathon Series Car Audio Speaker 4-Ohms : Amazon.com.au: Electronics
Amazon.com: Eminence Legend CA154 15" Bass Guitar Speaker, 300 Watts at 4 Ohms, Black : Musical Instruments
Amazon.com: Skar Audio SDR-12 D4 12" 1200 Watt Max Power Dual 4 Ohm Car Subwoofer : Electronics
Amazon.com: PyleUsa Two-Way Component Speaker System - One Pair 6.5'' Two-Way Component Kit, 360 Watts w/ 4 Ohm Impedance and 1'' High-Temperature ASV Voice Coil (Pair) - PL650CBL : Everything Else
Amazon.com: Taramps HD 3000 4 Ohms Class D Full Range Mono Amplifier : Electronics
CT Sounds MESO-8-D4 1600 Watts Max 8 Inch Car Subwoofer Dual 4 Ohm
5pcs 4 ohm 4RΩJ 10 watt Axial Ceramic Cement Power Resistor 10W: Amazon.com: Industrial & Scientific
Amazon.com: Rockville RSG15.4 15" 3-Way 1500 Watt 4-Ohm Passive DJ/Pro Audio PA Speaker : Musical Instruments
NVX VCW124v3 (VCW124 Version 3) 2400 Watt Peak (1200W RMS) 12" VC-Series v3 Dual 4-
Amazon.com: CT Sounds STRATO-10-D4 2500 Watts Max 10 Inch Car Subwoofer Dual 4 Ohm : Everything Else
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: Aexit 10W Watt Fixed Resistors 4 Ohm 5% Ceramic Cement Power Single Resistors Resistor x5pcs : Industrial & Scientific
