I have two Ac to Dc adaptors?

Question

one of them is 5v 550mA the other is 5.2V 400mA which one should i used for some computer speakers 5v 500mA?

thanks

-Phillip

Answer 1

I would use the one rated @ 5v 550 ma. The other one would supply just a tad more voltage(electrical pressure) than the speakers are rated for. While it might seem counter intuitive to use the one with the larger current rating(550Ma) the one with the lesser current rating(400Ma) would actually be more potentially damaging to the speakers amp section. The current rating is circuit dependent,meaning the higher the load in the circuit, the lower the current, and vice versa. While the higher voltage rating(voltage is the equivalent to pressure) can quickly cause damage to the delicate chips in the amp section of the speakers.