setting gain to unknown output value

[MrBrooks 0]

Here is my problem. I know the out put values on the amp @ 2ohm(115wrms) and 4ohm(75wrms),what I don't know is the output @ 3ohm which is waht my comps are.

Should I assume a midpoint? And effectivly gain down to say 85w(100wrms 3ways and 90wrms 2ways)meaning figure voltage for 85w @ 3ohms and set accordingly.

Or do I just need to get an o-scope and do it on a bench?

[shizzzon 461]

does the output voltage actually shift that much when going from 4 to 2ohms?

I doubt it but if it does.. that amp may not last too long.

[///M5 2,833]

And that will affect your ear how? No need to get every last drop out of any amp, in fact it is pretty much a bad idea and useless anyways as you won't hear it. Don't chase tenths when dB's allude you.

[MrBrooks 0]

Yeah......found the formula I was looking for after I made the post. Looks like I pick up 1.7wats from 4 to 3ohms any way.

2V is a huge swing from 2ohm to 4ohm? I ask because I don't know. 15V@2ohm and 17V@4ohm.

Anyway backward calcs only show 76.7w @ 3ohm. So I'll just set it up for a 4ohm load.

Just don't want to over drive anythhing.