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Ford Explorer Community - Maintenance - Modifications - Performance Upgrades - Problem Solving - Off-Road - Street
Explorer Forum Covers the Explorer ST, Explorer Sport, Explorer Sport Trac, Lincoln Aviator, Mercury Mountaineer, Mazda Navajo, Ford Ranger, Mazda Pickups, and the Ford Aerostar
The voltage shouldn't really matter as far as setting the gain. Turn the volume all the way up and turn the gain all the way down. Turn the gain up til you hear distortion and then back off a bit. Primitive but very effective. I have done the same for the last 20 yrs and have never blown a speaker. It must work.