Toyota 4Runner Stock Audio System Overview. Speaker wiring along with tacotunes.com System 1 & System 2 full audio upgrade for your Toyota 4Runner. Front Component Speakers at 100 watts x 2 Rear Speakers 100 watts Full Size 12” Subwoofer powered at 850 watts RMS Amazing sound clarity at all listening levels. Roll all your windows down and still hear ultra clear crisp music at 75mph! | tacotunes.com