[Arny Krueger]

"rdclark" wrote in message

On Oct 20, 7:08 am, "Mike S" wrote:
Set the receiver output to 4ohms for the speakers, this
keeps the receiver a little cooler.

Even if the TX-SR606 were rated for 4-ohm loads (which it
isn't) or had such a switch setting (which it doesn't),
this would still be the dumbest thing I ever heard.

If the receiver did have a 4-ohm setting and you used it
with 8 ohm speakers, all you would do is reduce the
dynamic range of the amplifiers by limiting the available
current.

That's not what the switch does. What it does is reduce the supply rails to
the output stage.

That naturally reduces heat dissipation under both quiescent and active
operation. IOW it will run a little cooler, whether you are playing music or
not.

This would make no difference (either in heat or
sound) at normal listening levels, but it would
compromise the sound quality needlessly when the system
was operating near its limits.

Yes, this will reduce the maximum voltage that is available, but most modern
home audio power amplifiers are rarely if ever used anywhere their maximum
ratings.