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Amazon.com: Planet Audio PL1600.4 4 Channel Car Amplifier - 1600 Watts, Full Range, Class A/B, 2/8 Ohm Stable, Mosfet Power Supply, Bridgeable : Electronics
Amazon.com: Gikfun 2" 4Ohm 3W Full Range Audio Speaker Stereo Woofer Loudspeaker for Arduino (Pack of 2pcs) EK1725 : Electronics
Amazon.com: Planet Audio AC800.4 4 Channel Car Amplifier - 800 Watts, Full Range, Class A/B, 2-4 Ohm Stable, Mosfet Power Supply, Bridgeable : Electronics
Amazon.com: DS18 G1000.4D Car Amplifier GEN-X Full-Range Class D 4-Channel 1000 Watts Max Power 2/4 Ohm Stable, Bridgeable, High/Low Pass Filter - Small Compact Amp for Speakers in Car Audio System :
Amazon.com: Crown Audio XLS 1502 Stereo Power Amplifier 525W at 4 Ohm (XLS1502) Bundle with Fastener Straps and 2X XLR-XLR Cable : Musical Instruments
Amazon.com: 2 x 12 Subwoofer 1200W 2" 4 Ohm DVC Pro Car Audio American Bass XO-1244 : Electronics
Amazon.com: DS18 Car Speakers Bundle - 2X GEN-X 5.7" and 2X GEN-X 6.5" 2-Way Coaxial Speakers with Dome Tweeter 150W Max 50W RMS 4 Ohm - Full Range Door Speaker - Great
Amazon.com: DS18 G4Xi GEN-X 4" 2-Way Coaxial Speakers 120 Watts Max Power 4- Ohm with Mylar Balanced Dome Tweeters - Full Range Car Replacement Speaker - Grill Included - 2 Speakers : Everything Else
Amazon.com: PRV AUDIO 2X 6MR250B-4 Slim Midrange 6.5" Shallow Bullet Speakers 250 Watts 4 Ohm, Slim Mount Car Audio Bullet Loudspeaker Compact for Doors with 1 Exclusive Lanyard (2 Speakers) : Electronics
Amazon.com: Timpano 1500 W Bundle with 2X 6.5 TPT-MR6-4 Bullet Midrange Speaker 500 Watts 4 Ohm + 2X TPT-ST2 3.5" 250 Watts Peak Super Tweeters for Car Audio Systems (2 Speakers, 2 tweeters) : Electronics
Amazon.com: Marine Audio TX2-120 Watts x 2 @ 4 Ohm RMS Marine Compact Car Amplifier 2 Channel Built-in Car Bluetooth (Bluetooth Dongle is Optional Sold Separately) : Electronics
Amazon.com: 2 x 15 Subwoofer 2000W Single 4 Ohm Bass Pro Car Audio American Bass DX-15 : Electronics
Amazon.com: Audiobank 2X 4x6 in 3-Way 250 Watts Coaxial Car Speakers CEA Rated 4 Ohm for Car, RV, ATV, Motorcyle (Pair) (2 Speakers) : Electronics
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Amazon.com: Sound Town Professional Dual-Channel, 2 x 1040W at 4-ohm, 4000W Peak Output Power Amplifier (NIX-4000IB) : Musical Instruments
Amazon.com: Harmony Audio 2X HA-C104 Car Competition 10" Sub 2000W Dual 4 Ohm Subwoofer New : Electronics
Amazon.com: Harmony Audio 2X HA-C124 Car Competition 12" Sub 2200W Dual 4 Ohm Subwoofer New : Electronics
Amazon.com: American Bass 2 x 12 Subwoofer 1200W Single 4 Ohm Bass Pro Car Audio DX-12 : Electronics
Amazon.com: DS18 G4.6Xi GEN-X 4x6 2-Way Coaxial Speakers 135 Watts Max Power 45 Watts RMS 4-Ohm Mylar Dome Tweeters with Neodymium Magnet - Clarity Unparalled by Other Speakers in Their Class -
Amazon.com: TORO TECH – RX2, 65 Watts x 2 RMS @ 4 Ohm / 2 Channel Car Amplifier, Sound Quality Class A/B Design, Built-in Auto Sensing Turn-On, Clip LED, Wide Range for
Amazon.com: Timpano Compact 4 Channel Amplifier Car Audio 500 Watt, 4 x 125 Watts at 2 Ohms, Mini Stereo 12 volts Full Range Class D Amp, Bridgeable Amplifier 4 Channels TPT-500.4 : Electronics
Xiaoyztan 2 Pcs Aluminum Shell Wirewound Resistors, 25W 4 Ohm: Amazon.com: Industrial & Scientific
Amazon.com: (2) MB QUART FW1-254 10" 1200 Watt Car Audio Subwoofers DVC 4- Ohm Subs : Electronics
Amazon.com: DS18 G5.7Xi GEN-X 5x7 2-Way Coaxial Speakers 150 Watts Max Power 4-Ohm - Full Range Speaker with Dome Tweeter Great for Car Stereo Sound System - 2 Speakers : Everything Else
Amazon.com: Gladen RC-105C4 4 -Channel Class Ab Amplifier; 4 X 105w @ 4-ohm, 2 X 300w @ 4-ohm Mono : Electronics
