Amazon.com: Car Two Way Speaker System - Pro 4 Inch 140 Watt 4 Ohm Mid Tweeter Component Audio Sound Coaxial Speakers For Car Stereo w/ 20 Oz Magnet, 1.85” Mount Depth Fits
Two Notes Torpedo Captor 4 Ohms – Thomann United States
PROZOR Auto Audio Verstärker mit 4 Kanälen 4 Ohm Car Stereo Audio Power Amplifier, an 4 Lautsprecher oder 2 Lautsprecher + 1 Subwoofer angeschlossen: Amazon.de: Elektronik & Foto
Amazon.com: BOSS Audio Systems PT3000 2 Channel Car Amplifier – Phantom Series, 3000 Watts, Full Range, Class A/B, 2-4 Ohm Stable, MOSFET Power Supply, Bridgeable : Electronics