Anyone install a delphi skyfi w/ wired fm modulator in their mach 460. I'm not getting any bass from the unit when its on. Not sure if I wired it correctly or not. I am getting power to the reciever but without the ground hooked up, nothing changes when i do ground it though. Could I have grounded improperly? What 12v power source are you guys using? Anything would be great, Thanks.