Active sub to home theater reciever

Jul 15, 2018
Hello all I'm starting to buy equipment for the theater room I have denon AVRX4400H the question is I have this sub my cousin gave me it's active subwoofer I tried connecting it to the receiver seems like it was not responding to to the media I think im doing something wrong or missing a piece of equipment to get it to work I will post the model of the sub.

Alto Professional Truesonic SUB15 | 15" Active Subwoofer (1200W Peak / 600W Continuous / Class D Power)
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