Hello,
I searched with no luck (or idea) to try to figure this out.
I have a stereo mixer (L/R main outs) but wanted to use only a single mono power amp for the mains.
Is there a way to connect both outs to the amp? I am not using any stereo inputs or the kind.
What are my options?

Thanks.
Brocko

Pan everything to one side or the other and just patch the single out?

Get another mono amp and run stereo?

Stereo is more indicate than mono dont you think so?

Depends on the application, Cristiano.

If someone's trying to fold a stereo signal to a mono amp, my immediate impression is that this is a PA application, and, in short, the answer is no.

Stereo in a club is a waste of time. One half of the audience hears the left, one half hears the right.

In fact, most small-club PA guys will use the left channel for the mains and the right for the monitors, and pan apropriately (drums all the way to the left, everything else varying degrees of left-center)

Broko, I am guessing your current mixer doesn't have panning knobs on the channels...? If ou don't have that option, I have two ideas:

1. - Requires Soldering -
You can make a Y-patch to take your left & right channels to a single line. But, to be "electronically safe", you need to create a resistance between the powered outs. This is to prevent current from one channel to drive back into the other when one side has a higher signal than the other. Insert a 5K ohm resister in line with the hot of each channel, and this will create a 10K ohm resistance between the channels. Most pre-amp inputs have between 10K and 25K ohm resistance on them. Quick math shows you will need to drive the gain up as much as 3dB to make up for the resisters.

2. -Requires Mini Mixer-
Pick the brand you prefer, but for example... Obtaining something like a "Behringer UB802" or "TapCo 50" mixer, you can run your line out of your stereo console through it. Send the left into one line input pair and the right into the other pair. Set the pans to center and you have glorified mono. You will also have a way to patch in a separate microphone or even a paging signal. I did this for a Halloween party I DJ'd in the late 80s, and pumped in a background sound effects track.

I hope this helps...

Hey Brocko

AudioMaveric's soldering technique with the resistors will work fine. Here are two other passive mixers that are inexpensive and will work also.

RMS 4 Channel Micro Mixer RMM290

ARTcessories PowerMIX1

Both are about 40 bucks.

Dave G

If there's no pan pots, then there's nothing wrong with him just patching one cable into either the left or the right, because both are getting the same feed.

In fact, there's no loss in doing that whether he has pan pots or not. If everything's panned center, then he'll get the whole signal to both sides, so just use one output, either left or right.

Lotta folks use the L/R as Main/Monitor and pan in order to create monitor mixes for club applications. Works great.

I have a macbook pro and I want to perform live what I have recorded and also use the MPC40 when it comes out. What is the best way to send a signal to a mixer board for the main and monitor mix?
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dkbv

Don't use both left and right, just pick one, since you have no stereo sources anyway.

kbvessel, you'll need an 1/8" TRS to 2 1/4" TS connector cable to get from MBP to a pair of direct boxes. What you need for the MPC40 depends on its outputs. If the outputs are balanced line level, then you can run them directly to the console, if not then you'll need direct boxes as well.