[sdiy] Stereo to Mono Amp Question?

[The Peasant]

Hi Cynthia,

Connecting the inputs together would be OK, but connecting 
the outputs together would likely blow the amplifier. In a 
mono application you have two choices; just use one channel 
of the amplifier, or bridge it.

If 20 watts is plenty for you, then just use one channel. 
For up to 4X the power (depending on power supply 
capacity), bridge the amplifier. To bridge any amp, connect 
the input signal to one channel input. At the same time, 
send the same input signal through an inverter circuit and 
connect the inverted signal to the other amplifier input. 
Connect the speaker across the two output terminals (DO NOT 
connect either speaker lead to ground). That's all there is 
too it.

Take care,
Doug

______________________
The Electronic Peasant

www.electronicpeasant.com


Quoting Cynthia Webster <cynthia.webster at gte.net>:

> Hi!
> 
> I've got a perfect little 20 watt power amplifier card
> that's just the right size... but it is Stereo,
> and I have a mono application.
> 
> (I'm not 100 percent sure what is really going on
> inside,
> when using the Bridged Outputs of a power amp).
> 
> Is it possible to simply connect the two stereo Inputs to
> one another,
> and the stereo Outputs to one another, and just proceed
> like normal
> using the amp that way?
> 
> Can I short left and right channels together at both
> ends?
> 
> (I feel silly asking this question!) :)
> 
> Thanks
> 
> Cynthia 
> 
>