I had an Arion Legacy speaker system (http/www.amazon.com/Arion-Legacy-ARDS750-BK-Crushing-Subwoofers/dp/B00U7HQWU8) but the control box broke. Is there another one i could buy that i can connect the 2 satelite speakers and 2 subs to? The speakers require RCA input but i can't find one that has RCA outputs