fuse for amps

[hippy]

i posted this question on CAA but i need a quick answer .. how do i know what value of fuse to use for my amps?? eg i have an alpine m500 and i was thinkin of using a 60 amp fuse ... also i'm currently using a 30amp fuse for my eclipse which can do 4x50rms at 4ohm.

thanks

[advance]

a good rule of thumb is to add up all of the fuse ratings on the amps you are running and get that size fuse.

eg

one amp running a 20amp fuse and the other a 40amp= 1 60A fuse on the power wire.

This generally works well but remember not to exceed the rated amperage of the power wire you are running.

...James

[Actinide]

To determine your amperage drawn from the cars power source,

1, first determine the 4-ohm rated RMS power output of the total system's amplifier (s)

2, Add these together

3, Multiply the total RMS rating (left and right channels) by 2. This is to compensate for most amplifiers' 50% efficency

4, The resulting figure is the total input power 'drawn' in watts.

5, Divide the wattage drawn by 13 (the average vehicle supply voltage

[hippy]

i'll do the sums when i have time ... but yeah i just bought a 50amp fuse ..

[Fhrx]

I usually work out the maximum current draw, add 10% and install that fuse.

[HondaMania]

Originally posted by Actinide

1, first determine the 4-ohm rated RMS power output of the total system's amplifier (s)

Is that per channel? meaning if it's 180 w RMS x 2 @ 4 ohms, then you would calculate it as 360 w RMS?

[Actinide]

You total up all of the RMS power of your cars amplifier (s),

and multiply the total by two.

this gives you the total input power drawn from power source

in watts..