Hello MusikFreunde. i currently have: a 4 channel endstage (sony xm-440ex) that supplies the soundboard and the sub. the front system runs directly via radio. now I want my sub “emphaser EI 2S4”, maybe one knows, with an additional endstage entertained. I thought of the “rodek R2100A2”, because I can get the very cheap. what do you think about it? from the endstage sub. and how do I connect the second endstage? data of the endstage: 2 x 110W RMS @4ohm 2 x 150W RMS @2ohm 1 x 300W RMS @4ohm gebrückt. da diesen daten unfortunately not tell me much, and I only see 300W, I want to ask you experts how I can get the maximum power out of the amplifier for the sub. a sketch would be great! thanks to all of you!