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-   -   Speakers: on but silent. Power consumtion? (http://www.hardwarecanucks.com/forum/peripherals/45249-speakers-but-silent-power-consumtion.html)

clone63 July 28, 2011 10:06 PM

Speakers: on but silent. Power consumtion?
 
If I forget to leave my speakers on are they sucking up much juice? An older Altec Lansing 2.1 setup.
If it's a model dependent thing, I'll have to look into it, but a general idea would still be nice.

LarkStarr July 28, 2011 11:16 PM

depends on your definition of much. a watt or two

clone63 July 28, 2011 11:57 PM

No, I don't define that as "much"

martin_metal_88 July 29, 2011 05:09 AM

maybe up to 5 watt if it's a old unit but I wouldn't say more than that.

krazyups July 29, 2011 06:16 AM

Depends on the amp design, but most likely it is either a class AB or class D, meaning that the leakage current when the unit is off would be much less than 1W. Chances are the highest power consumption would come from the LED indicating that it's on.

SKYMTL July 29, 2011 07:03 AM

I have Logitech 2.1 and Klipsch Promedia sets. According to my power meter, the Logiech consumes 4W when idling while the Promedias consume 1W at most.

clone63 July 29, 2011 09:10 AM

Quote:

Originally Posted by krazyups (Post 536757)
Depends on the amp design, but most likely it is either a class AB or class D, meaning that the leakage current when the unit is off would be much less than 1W. Chances are the highest power consumption would come from the LED indicating that it's on.

That visual aid has wasted it's last watt, time to disconnect that S-O-B!

Thanks all!

krazyups July 29, 2011 11:04 AM

Quote:

Originally Posted by SKYMTL (Post 536764)
I have Logitech 2.1 and Klipsch Promedia sets. According to my power meter, the Logiech consumes 4W when idling while the Promedias consume 1W at most.

Hmm, I wouldn't have guessed that, I would have assumed that they would have much better quiescent current control. But then again, if you're driving it from the wall, then 1W/115V = ~8.5mA of quiescent current, which isn't too bad. Of course, I'm used to trying to keep the quiescent current below 100ľA, so even 8mA seems like a lot to me. :biggrin:

Edit: Come to think of it, that 8mA probably is mostly the LED, I'm also used to working with 13.5Vdc (automotive).

frontier204 July 29, 2011 04:42 PM

My old Altec Lansing 2.1 system from ~2004 draws 7W (yep, seven watts) according to my BluePlanet meter even when it's "off". I only have it plugged in when I don't feel like using my headphones.

<OT>
It's still not as bad as my Rogers cable box which draws over 15W unless it's unplugged :bleh: I put that on an old Christmas tree timer so it's only being a parasite for half the day.


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