hello folks i need to operate live sound in an outdoor enclosure. there would be people making speeches there. the audience would be less than 5000 or so. i plan to use 8 pairs JBL MP225 driven by Numark Dimension4 Amps. Allen & Heath PA28 Mixer. Audio Technica PRO11 49QL. please ppl, any advise? is this sufficient. i plan to connect eacn amplifier via a samson PB10PRO. this is all for Pakistan... plz guide. would really appreciate.