your looking at three pcs. of Acurus from the top is (the ACT-3 5.1 pre/pro, with ABM). A-150X2,A-100X3. very nice pcs. just one I don't like with the Amps. the (Binding post's are too close to each other) one has to be carefull when connecting spkrs. all acurus owners know that!! the amps runs very Cool.the Act-3 gets hot but "normal"