Quote:
Originally Posted by Pottsy
Be cautious.
An amp connected to a high resistance supply like the 12V socket, will see voltage drops as the load increases. The load can increase quite significantly even at low levels, if the bass is turned up.
If the voltage drops, then the amp will clip the output wave. Clipped output can and will trash speakers, even when driven well below their rated output!
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Nothing to add here, except maybe a capacitor.
A decent capacitor does flatten the load-peaks, but still...
I don't think it's wise BTW to draw 25 amps from the rear power socket over a longer period of time, although I must admit that I haven't seen the cable that runs to the socket. But it has to be VERY thick, with as few connectors as possible on the way.
Another way to avoid high current, especially for subwoofers, is using an 8 ohm speaker. I know that in theory can have more watts from a 4 ohm speaker, but taking in account the power losses, that shouldn't be much of a worry. And speaker efficiency is just as important: a speaker at 92dB only needs half the power of a 89db chassis to reach the same soundlevel.
K.