just my .02 cents on second skin audio, i abosulty love the stuff, great customer service, and great stuff, in my car i have 80sq ft of damplifer, and 4 gallons of spectrum, i have the damplifer on 2 of the doors and the trunk so far, and i have the spectrum on the rest of the car, when i am done puttin the damplifer on the other 2 doors i will be putting spectrum over the doors and the trunk. I will have pics up tomorrow but i am way to tired right now, but just with what i have done so far the benifits have been very ammazing, and if you ever think about using some kind of damplifer go for second skin audio, its by far the best