Hi Mosiqaar,
At amp "A" you have 2 outputs 1/4" plugs this is for your Right & Left, main speakers!
The Second "B" amp is as Don has said. Its for unpowered monitor speakers! The other monitor output is for powered moniters. I don't know the output power of amp "B" but it's not nearly as powerful as amp "a"! If your not using Amp "B" you should keep it shut down as you have know load on it! I don't really know this piece!
It may have a sw. to shut the amp down. Both the A&B Amps when used should always both Right & left speakers plugged in, because they are in paralel with each other. If you just plug in one speaker
you get a bad empedance match! Over loadl the the amp somewhat! I wouldn't.
Word of advice: Get you a dust cover, even a towel would work til you find one & don't let to many people get their hands on it!
Sorry for rattleing on so long
Good luck with it! Sounds like a winner!
You'll get it to workin' right, hang in there!
All the best,
Nobby


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