I just purchased a jensen XA 1120 amp and i have it in my home system hooked up to a rv battery but whenever i hook the battery up the power light doesnt come on and theres no power going into it. I checked all the wires and they were fine but near the back where i hooked up the battery it says between the +12v and the Gnd for ground it says RMT which i think is for a remote and when i researched it i think it should have a remote but im not quite sure, so can someone please help?