how to calculate the current ampere draw of a amp?

when only x watts/rms is availiable.

In article ,
"AntiSpammer" wrote:

how to calculate the current ampere draw of a amp?

when only x watts/rms is availiable.

Amps * Volts = Watts
or
Amps= Watts / Volts

Class AB and B amps are less than 50% efficient so their maximum current
draw is about double their RMS wattage divided by 12.

Average current draw varies by music but could be around 1/10 the
maximum.

"Kevin McMurtrie" wrote in message
...
In article ,
"AntiSpammer" wrote:

how to calculate the current ampere draw of a amp?

when only x watts/rms is availiable.

Amps * Volts = Watts
or
Amps= Watts / Volts

Class AB and B amps are less than 50% efficient so their maximum current
draw is about double their RMS wattage divided by 12.

Average current draw varies by music but could be around 1/10 the
maximum.

If there fused, you could just shoot for the max fuse rating. my amps have 4
20A fuses each, so I make sure I have at least 100A available to each amp. 2
amps, 200A alternator, 0 gauge wire, 200A inline fuse, 3 batteries, etc...

Unless you have specs from the manufacture, your guessing anyway, and I
think the fuse technique works well. Average current draw is not as
meaningful as the max, instantaneous draw would be. If your supply cant meet
the peak demands then you'll have problems such as clipping.