"Faustino Dina" wrote in message ...
I also wouldn't worry over 6 vs. 8 ohm. Shouldn't be a problem.
(BTW, the loudspeaker specs from manufacturers are often inaccurate,
and impedance will vary with frequencies also.)
They're just trying to be
more accurate in their rating. It just would not be a good idea to runs
two
pairs at once on that receiver.

Agree, unless the receiver manual states otherwise.

The receiver is a Sony STR-DE685, the manual doesn't says anything about
speaker impedance except in the rear view of the receiver where is a label
below the speaker connectors that says to use 8-16 Ohms speakers.

Then speakers of 8-16 ohms should be fine, and I also think that 6
ohms is close enough to be OK and not cause your receiver to overheat.
You ahould make sure your receiver is well ventilated, no matter what
speakers you use. There should be at least a few inches of space above
your receiver so that air can circulate and the receiver doesn't
overheat.

BTW, Consumer Reports magazine (www.consumerreports.org) tests reviews
receivers. CR tests whether receiver will perform acceptably at 4, 8,
and 16 ohms. Last November, CR printed a review that includes your
receiver. CR recommended against using 4 ohm speakers with almost all
the receivers tested, including yours. So just in case you ever are
considering 4 ohm speakers, you probably shouldn't use those.

If I was using really low-impedance speakers (such as 2 ohms), I'd put
my hand on top of the receiver and make sure it's not getting too hot
and is well ventilated, especially when the receiver is turned up to
loud volume.

So can I trust the 6 Ohm speakers will not melt my receiver as long as I
don't turn it too loud ? (Is anybody ready to put his sign under this... ;-)

I think you'll be OK. But when you start using the 6 ohm speakers,
just put your hand on top of the receiver occasionally and make sure
the receiver doesn't feel hot. (It's normal for a receiver or amp to
feel warm, but if it feels hot, that's a sign of trouble.)

Also, just out of curiousity, I wonder if your Sony receiver has a
built-in cooling fan? That can also help, although the fan may
contribute some noise. Modern Dolby receivers have so many amps and
electronics built in that some of these receivers now include fans to
help cool the receiver.

(BTW, many years ago when I didn't know better, I once installed a
reciever in some bookshelves and put one bookshelf right on top of a
receiver, blocking the receiver's cooling vents. Eventually the
receiver failed and required service, the technician told me the
receiver had overheated, he repaired it, and I learned my lesson about
making sure receivers and amps get enough ventilation. Another BTW:
that happened 25-30 years ago, and thanks to luck and ventilation,
that receiver is still working now.)