Amazon.com: JVC CS-DR421 4" Inch Car Speakers, 220 Watts of Power, 110 Watts Each, 2-Way Coaxial, Built Tough, Perfect Factory OEM Replacements, Sold in Pairs : Electronics
Jvc Ks-dr2104dbt Bluetooth 4-channel Compact Digital Amplifier 50w Rms X 4 @ 4 Ohms With 2 Pairs Cs-dr620mbl 6.5" Marine Speakers W/ Black Grills A... : Target
JVC KS-DR1004D Class-D Compact 4 Channel Class-D Marine Power Amplifier
My JVC JA-X9 4 Channel (Quad) Amp. What do you think? : r/audiophile