technically yes, but one thing also noted you said you have the gmos-1 harness right, im pretty sure thats the one for non monsoon systems. The gmos-4 is for monsoon cus i think the harness cuts the amp from the hu and only uses the monsoon amp so it doesnt overpower the amp or something like that. So that might be why your sound is ****. i could be wrong but thats what ive heard. i have the gmos-4. But honestly just pop out the hu and rerun the wires from the back. Do it right the first time. I could rewire and run it under the carpet for you in no more than 15 minutes. Its really not that bad
