Review on PAC VOLT 39 Adjustable Voltage Adapter by Jeremy May

This works great for my 2003 Mustang with Mach 460 system. This is required if you have an aftermarket head unit with a stock subwoofer/ Install speakers. Hallmarks of the factory Mach 460 system include a 5V output. Installing a stock 12V main unit will minimally result in the loud pop that many users hear upon power up, or possible/eventual system crash. This voltage adapter solves the problem perfectly. The wiring is more complicated than the standard setup, but not overly complicated. I searched YouTube and found a video with some wiring information and figured out the rest myself. Check out the picture to see how it looks together. I know the best fix/upgrade for a Mach 460 installation is a complete overhaul. I'm not ready to spend that much money now. I'd rather invest in faster movement. This is great for what I was looking for.