car amplifier question 2 or 4 ?

they are telling you what the output power is into a certain load. Many solid state amps will deliver more power into a 4 ohm load than 8, often a doubling of power. but at a certain point the amp is not able to deliver sufficient current and may become thermally or electrically unstable and will shut down or worse, melt down.

What Swamp said............

ET

Thank you for the information.