Stereo from mono

[dannydiazfelix]

My microphone mixer (Shure SCM800) has a mono output, strip bar to be exact, how can I hook up the left and right channels in an amp?

[j_dunavin]

Mics. are only mono anyway, which case your pre amp was only designed to run. Sorry you only have mono. What are you trying to do exactly?

[thehammer]

You'll just have to make a "Y" adapter and run the same mono signal into each channel of the amp. this won't give you stereo but it will power both channels. Most pro amps (such as the QSC RMX) have input bridging capability so you only need to run one mono line to the amp and the amp can be configured to feed both channels.

[bobleeqsc]

> You'll just have to make a "Y"
> adapter and run the same mono signal into
> each channel of the amp. this won't give you
> stereo but it will power both channels. Most
> pro amps (such as the QSC RMX) have input
> bridging capability so you only need to run
> one mono line to the amp and the amp can be
> configured to feed both channels.

It's not "bridging" the inputs, but paralleling them.

-Bob

[thehammer]

In my first draft (that I didn't post, trying to simplify things) I explained the "Y" splitter as a parallel connection to the amp. I then used the incorrect "bridge" terminology to describe the amp input. To clarify things, a "bridged" input would take a single input signal and send an inverted signal to the second amp channel to "bridge" the two channels together. Correct???

[dannydiazfelix]

If you notice, I didn't write anything about stereo in the actual message, I only did it in the subject line as a means of getting your attention.
Thanks for the responses though.
I just want to be able to use both channels of my amp with a single signal (i.e. mono). In the manual for the Crown amp that I have it states how to do it. But I love this forum 'cause you always get the answers you need.
Once again Thanks.

[bobleeqsc]

Bridging a power amp's two channels involves putting their outputs in series so their output voltages add. Most two channel amp outputs have one terminal that is at chassic ground potential and one on which the output voltage appears. By making one channel's output the mirror image of the other's, you can get double the output voltage swing across the two "hot" outputs.

In some amps, like most QSC models, the signal for the second channel is fed internally from the first. In others, like the Crest Professional Series and the old QSC MX Series, in bridged mono the two inputs are connected together in parallel, but with the polarity inverted on one of them; this approach requires that you set the gains identically on both channels.

-Bob