> Look at the attached drawing taken from Sam Electronic Circuits web site.
> Is it possible to connect the two ALREADY bridged amps together to gain
more
> power?

No.

> right now each amp deliver 18W, I want to gain 36W and more (mono).
> circuit is operating via car battery (12Vdc) so high current consumption
> isn't an issue.

9W per channel is a fundamental limit when using a single 12V supply to the
final amplifier stage into 8 ohms.  Using two finals and driving each side
in opposition can create at most a 24V peak to peak signal.  That's 12V zero
to peak, and 12V / sqrt(2) = 8.5V RMS, 8.5V**2 / 8ohm = 9 watts for each
channel.  To get more, you have to create a higher supply voltage and/or use
lower impedence speakers.  That's why some car speakers are 4ohms instead of
8ohms.


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Embed Inc, embedded system specialists in Littleton Massachusetts
(978) 742-9014, http://www.embedinc.com

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