I am installing a Bluetooth stereo in my car, JBL Cruise-X speakers and a JBL Nanosub. I am looking at possibly hanging the sub under the "roof" of the passenger footwell. I noticed the magnet in the sub is very strong, and I have the MSD ignition box mounted on top of the footwell. I estimate the distance between the sub and the MSD box would be about one inch. I am concerned the magnet will disturb or even damage the MSD ignition. Thoughts anyone?