FM Modulator

I have a '01 Dodge Intrepid.  After I got the car I installed a Panasonic CD player.  I used the proper wire harnesses and everything worked and looked great.  This past summer I got an iPod and was using the iTrip FM transmitter to play the songs through my radio because mine doesn't have an aux input.  Two weeks ago I installed an FM modulator (Scosche FMMOD01) because I am tired of fussing with the iTrip.  I pulled my radio out and disconnected all of the harnesses.  I used a tap-in quick connect to connect the red power wire to the power wire of the radio and I attached the black ground wire under the braided copper ground wire attached to the back of the radio unit.  I plugged the antenna wires in accordingly and fired everything up.  Everything seemed to work fine until I noticed that my front speakers (only the front speakers) began to cut in and out, almost like there was a short.  I have checked all of the wires and all of my connections seem to be sound so I don't think there is anything loose.  I have searched the internet but I can't find any advice specific to this problem.  I am wondering if I shouldn't have used the power line from the radio and maybe I should try grounding the modulator elsewhere but I am concerned with the ground loop problems I have been reading about.  Any suggestions?

Is the problem on all music sources, or only on FM while using the modulator?  I doubt your modulator is the culprit, because if there was a problem with it, it wouldn't only be on the fronts.  Pull the radio, and unhook the front speakers from the harness.  Connect a couple test speakers to the outputs and see if the problem persists.  I think in the process of removing the radio, you may have some connections that worked themselves loose so double check that.  How did you connect the wires- crimp or solder?  Pull on the wires to make sure they're all good and secure.My ex once told me I have a perfect face for radio.

It is a plug and play model and works fine in the truck via FM transmission to my regular in-dash FM receiver. My concern is: If I bring it in the house and use an AC adapter as a power supply, that plugs into the wall and converts to 12V Dc and uses the wrong polarity, will I burn up my new toy?

whoops...wrong thread. nevermind the above post