Re: Parallelling audio outputs

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resistance?
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Line level (Ca 100mV)



Re: Parallelling audio outputs


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It's called bridging - there's probably heaps of info around on it. Some
dual channel sound-reinforcement (eg Rock PA) amps have it built-in.

Short Story:
At the inputs to the amps you have to feed one channel with  a 180
degree phase shifted (inverted) version of the desired signal while the
straight signal goes to the second channel.

At the outputs, connect the -ve of Ch1 to the +ve of Ch2 then use +ve of
Ch1 and -ve of Ch2 as the speaker connection.

Chris.

Re: Parallelling audio outputs



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The -ve outputs are at ground potential, so connecting them as you
suggest shorts the output of one channel to ground, and connects the
speaker to just the other channel.

What you need to do when bridging the outputs is connect the speaker
between the two +ve outputs, and leave the -ve outputs unconnected.

Anyway, I believe the original poster was talking about line level
outputs, not speaker outputs.

Peter

Re: Parallelling audio outputs


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I think you've grabbed the ball and gone charging off for the wrong goal
line there - the poster was asking about connecting line-level outputs
together to get a mono signal, an whether this would fry anything in the
output stage of the devices involved.





Re: Parallelling audio outputs


Just do it.
You wont fry anything - promise.
If it for a single audio system, it will be a capacitively or inductively
coupled output, meaning DC will not go through it.... this means no high DC
currents ...no smoke.

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Re: Parallelling audio outputs



"Simone Merrett"
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**  What is an anonymous promise made on usenet worth  ?


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** Nonsense.

Many audio line outs are direct coupled to the output of an op-amp or
similar cct.


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**  But also no sound or terrible sound.



.......  Phil





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