[Jeff]

Originally posted by GR8FLPT
How is it wired, I belive the OEM sub uses the high level output form the stock radio & converts it internally in the amp in the box.
Where is box grounded? you may need to run a 2nd ground to back of radio. try disconnecting inputs to sub & see if it goes away.

If it does then there is a gnd difference between deck & sub amp. if noise is still there, then try a different power source like a battery thats not connected to your car. (I use a power supply), just had an install this weekend that was having wierd problems with the the stock electrical system. External power source can help toruble shooting faster.

I used the stock wiring and followed the directions completely (maybe that's my problem ) The unit is grounded at the back, behind the sub, and also to the back of the head unit (again, per instructions.) The ground wires are part of the loom that comes with the sub.

I like the second power supply idea. I'll try that in my troubleshooting. Thanks for the tip.

As for the sound, I'm really happy with the added oomph the sub provides. I may not win any contests with it, but I've got greatly improved sound, and I don't sacrifice any (well, not much) cargo space. I can fit my hockey back back there and still have great bass.