Will a 250 watt power converter power a 1200 watt Rockford fosgate amplifier?

The electrical watt rating of the inverter is

different than that audio watt output of the amplifier. Your best

bet would be to go to the Rockford Fosgate website and look at the

electrical requirements for the amp.

Even though the amplifier is rated at 1200

watts, it will consume more. The manufacturer will probably give

the power consumption in amps, or at least the size of fuse to use

in the power supplied to the amplifier. Use the following equation

to calculate the power required for the amplifier. P (watts) = I

(amps) x V (volts). For instance if the manufacturer says use a 120

amp fuse and you are using 12 volts in a car, it would be P = (120)

x (12). P = 1440 watts. You would need a power converter that can

supply at least 1500 watts continuously to feed enough power. You

can always use a bigger converter because the amplifier will only

draw what it needs. There is also one more issue, if you are

converting from 120 V from the house, to 12 V for a car amplifier,

you need to make sure that you are plugged into an outlet that can

handle the load. If you are supplying 1500 watts on the 12 V side

and you plug it into the house 120 V the voltage is approximately

10 times more. This means that the amperage will be 10 times less.

so 120 amps at 12 volts = 12 amps at house voltage, so any normal

outlet should handle it; however, if you find a larger converter

like 2500 watts, the current would be I = P/V: I = (2500W)/(120V) I

= 20.8 amps. Most house outlets can handle 15 to 20 amps. You run

the risk of popping a breaker.