"Craig Prouse" wrote in message ...
"Ron Natalie" wrote:

That's right. When you use that Radio Shack adapter cable, you're plugging
an eight-ohm load into your headphone jack. Eight is not between 150 and
1000. Consequently you're asking your amp to drive nearly 20 times its
rated output on that jack.

No, no, no. Power transfer is NOT directly proportional to impedence.

Of course it's not. I said it's inversely proportional.

Now do you want to argue the wisdom of sticking a hairpin in a light socket
or do you want to argue my precise derivation of the number 20?

No, I'm saying that unless you know the characturistics of the last amplifier
stage you don't have a clue how it's going to perform when you feed it into a
different impedence than what it is spec'd for.