\rHi Anthony:
This Amplifier will be perfect for your application. A couple of options, one connecting the three pair of AP-640 without volume Controls you could connect two pair in parallel on speaker A output and then the third pair to Speaker B output on the AMP-200. Second option would involve adding adding Volume controls and ISS4 speaker selector, one for each pair of speakers connected in parallel to the Speaker A. Look at our OVC volume controls that are fully weatherproof and can mount on wall. Third connect the three pair using our SSVC4 four zone speaker Selector with built in Volume Controls. You would have an option to add a fourth pair of speakers (maybe for inside the Trailer itself). The SSVC4 would allow you to control the volume levels from a central location. You also have the ability to add a sub woofer to your system as well, checkout the S-10 Powered Subwoofer at a great price including freight. You would connect your source to Input #2 and then connect the Sub woofer to Output #2. Then your Mobile Concession Trailer would be a rocking. Also checkout our CL3 rated speaker wire (16/2 and 16/4)
Good choices...
TL/3897\r