On Sat, 11 Jun 2005 00:49:40 -0500 "fone.freaky"
wrote:

Bottom line: What are the ups and downs of replacing a home theater 8 ohm
sub woofer with a car audio 4 ohm sub woofer ?

For the same applied voltage the 4 Ohm speaker will draw 2 twice as
much current, which will put double the electrical power into it.

To put the same electrical power into it, you will have to reduce the
voltage by the square root of 2, which will still mean that the
current draw will be up by the same factor.

So it all depends on whether your amp can deliver the extra current or
not. If this was a unified system (sub-woofer with amp built in) then
it is unlikely that the amp is going to be happy with this. The most
likely outcome is that the output transistors will blow the next time
you turn the volume up.

I'm guessing that high volume is what blew the original speaker, so it
seems likely that you will do this again, with slightly different
results.

-
-----------------------------------------------
Jim Adney
Madison, WI 53711 USA
-----------------------------------------------