Porsche: Cayenne Turbo JL Stealth Install Leave a Comment / Audio, Custom Fabrication / By Ultra Auto Sound This baby is getting some stealth audio done at the one and only ULTRA AUTO SOUND. Stealthbox bolted in. To the right of the stealthbox is the amplifier mounted on a custom board. JL Audio W6v2, once the cover goes on its stealth Share This:FacebookTwitterEmailLike this:Like Loading... Related