Originally Posted by VictorCharlie
I have it mounted in my trunk, parallel to the back seat. We originally used low level interconnects but switched to high level interconnects to see if that was the problem. So we tried both methods. We connected the power by unscrewing one of the fuse box connections and placing it under one of the main fuse box inputs. We also used a 30A fuse instead of the 15A fuse. Our ground is in the metal framework of the trunk with a screw securing the ground wire. I will try and get a hold of a DMM and see if I can check it.
First, I would highly suggest that you replace the 30A fuse with the 15A fuse if you have not already done so. Your 12v power needs to come directly from the battery and not your fuse box. Be sure to use an in-line fuse holder at the battery, no longer than 18" inches from the positive post (with a 15A fuse installed). You can pick one of these up at your local auto parts store relatively inexpensive. This will ensure that you have a 12-14.4v at all times (13.8-14.4 when the vehicle is running). Second, if you used a self-tapping screw for your ground, it would be a good idea to replace it with a nut, bolt and 2 washers. Be sure to scrap all of the paint and primer from the area. Afterwards, you can spray over the area with primer or paint to prevent rust. Also, the Tube will always perform best pointing towards the taillights with 2-4 inches between the Tube and the vehicle. Are you still using the high level interconnects? If so, front or rear? It is best to use the front. The reason being is this, if you use the fader, as most people tend to, increasing the fader to the front reduces the signal at the rear speakers, which will reduce the signal at the Tube. If you have any other questions feel free to post back or use the PM.