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In Reply to: RE: its pretty dry where I am, posted by louie3 on March 18, 2015 at 08:39:40
The factory is being conservative as they should be.
Any stat should be unaffected by playing signal with no power. Nothing changes from the audio side of the equation with or without AC power applied. The only thing AC power does is energized the bias supply to apply voltage to the diaphragm.
With the Quad no power does defeat the protection circuits but these are only required under extreme drive conditions. There will be no problem unless the user decides to dump 200 watts of power into the speakers. Most amps people use with Quads, even if clipping, will do no damage.
Leaving any stat energized all the time just exposes everything to high voltage all the time. High voltage degrades everything over time. There are some exceptions the original Quad should be left on all the time. But this is a completely different beast versus the 63 and the original Quad design approach is quite unique among stats.
I understand the caution. The typical user is not aware of these things and erring on the side of caution is always a good idea. But turning them off when not in use does no harm it is actually good for them. And applying signal to the speakers when powered down does no harm within reason.
Follow Ups:
Thanks, Kent.
Naturally as soon as I realized I did not need to leave the speakers on all the time, the obvious question was...hmmm what's the electrical effect of leaving them on all the time?
I am turning mine off at the end of the session from now on.
Thanks again...sho is nice to have somebody who actually knows stuff around.
What about the Stax F81's and F83's? These seem to take a long time to energize properly, so I do leave mine plugged in all the time. Is this a mistake?
The Stax F-81/83 like the original Quad should be left energized all they time. The conductive coating used in both speakers require that they be left on. This will present no long-term problems.
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