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Hi! I am about to upgrade my "Outdoor rave" System. I will be using two 15" PA speakers, 600RMS, 8ohm. And I got two 155Ah industrial AGM batteries as power source. The speakers: HK Audio L5 115 F Linear 5 thomann.de/gb/hk_audio_l5_115_f_linear_5.htm Now I need your help to choose an amp...