what dictates ohm stability?

[capitolj80]

what part of an amp dictates it's ohm stability and how does that work...i was thinkin maybe the output stage, but i dunno...im curious...also, how is any givin speaker's resistance achieved?

[Bfowler]

i'm pretty sure. the power supply and how much currant it can take (which is directly proportional to how much heat it can dissipate)

using the formula "watts = amperes^2 x ohms"

if you have a 4ohm driver, and are trying to get 1000 watts....


1000=a^2 x 4 = 15.8 amps....

but at 2ohms

1000=a^2 x 2 = 22.4 amps... (these are both not taking into account that amps are not %100 efficient, this delta is even higher when you realize that most sub amps are ~%70 efficient (which means of every ampere it takes in 70% makes actual power, and 30% is turned into heat))

also...this may be way off....this is just what makes sense to me....

[capitolj80]

that does make sense...i was thinking it might be something as simple as the output stage's voltage (or amperage) "pass-through" capacity and how too little resistance from the speaker could exceed it...im thinkin yer prolly right, though.