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Would using a P.S. with 1v higher output than my speaker system requires lead to any harm? Answered

I have a speaker system that is operated through the subwoofer module and requires an input of 18v, 2.5a.
I have tested my Laptop's P.S. (19v, 4.75a) with it, and for the short amount of time I didn't see (or smell) any sign that should be a concern. As a matter of fact, a few issues (hummings and such) were solved, in comparison with the old P.S. for the subwoofer.
Given that it is not a laptop, but a simple speaker system, would the 1v difference be any danger for it?

Discussions

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NachoMahma
NachoMahma

9 years ago

. Did you measure the 19V with the speakers connected or just an open PS? If that's no-load volts, you may very well have 18V (or less) when the PS has a load on it.

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dragoboyo
dragoboyo

Answer 9 years ago

Not an open PS, just a regular brick that powers my laptop.
The label states the output is 19V and 4.74A, but I haven't measured it yet (due to lack of a Voltage meter).
So no, not an open PS, nor have checked the exact output Voltage.
But given it reads, let's say, 18.5V, you wouldn't recommend?

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steveastrouk
steveastrouk

Answer 9 years ago

I'd go for it. Close enough

Steve

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dragoboyo
dragoboyo

Answer 9 years ago

Although I longed for that kind of an answer, I think I'd rather wait for someone to provide me a Voltage meter, just to be sure it's not outputting around 19.5V
Thanks anyway for your precious time.

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steveastrouk
steveastrouk

Answer 9 years ago

You need to measure it on the device, and when its loaded. Open circuit readings here don't count !

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dragoboyo
dragoboyo

Answer 9 years ago

I can measure the +/- legs on the PCB while at working state.
Will that do?

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lemonie
lemonie

9 years ago


No-load voltage will be higher than loaded voltage, the laptop will regulate the supply down so it's starting with more than enough. The speaker system may do the same.
Anyway it's only ~6% over, you should be OK (if you don't turn it up to 11)

L