On Jul 21, 5:56*pm, "j r powell" wrote:
"William Sommerwerck" wrote in message

...

Have you tried simply using a pair of 8-ohm speakers
with the amp? Chances are *they'd work (less power,
but shouldn't harm the amp).

I have, but then the audio output is too quiet for my requirements.

I'm not being sarcastic -- but how do you know that paralleling the outputs
will produce a significant increase in power? Ignoring the very pertinent
question of how to do this /correctly/, the most you could get is a 3dB
increase, which is plainly audible, but hardly a large increase.

A small increase is better than nothing.

The increase will be 0. Changing from 4 ohms to 8 will cut the power
in half because the voltage stayed the same and the current cut in
half because of the impedance change. Paralleling the amps raises
current capacity - which you don't need - and does nothing to increase
the voltage. In fact, your resistors will reduce it slightly. You need
a bigger amp.

G²