got an 01 dodge ram reg cab sport.... where is the stock amp located for the infinity system? anyone know?

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nevermind

If it's the same as a '97, I'm pretty sure it has Individual amps mounted to the speakers in the doors and cab corners. The backs of the speakers have an odd looking attachment that is proabably a combo amp / crossover for the tweeters. Also, I used a multi-meter on the factory wires and found that it's a straight shot from the stereo to the speaker connectors.

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The Ram has a 3" Pro Comp susp lift, 33x12.50x16 SSR radials on 16x10 Xtreme Alloy 1079's, front and rear receiver hitches, Smittybilt nerf bars, a checkmate tonneau cover, K&N air filter, Flomaster w/ shortened exhaust, a Kenwood mp3/cd player, a MTX Th

Yeah the amp is on each speaker. You can replace the deck without replacing the speakers but not the other way around so do both and your good. 6x9 speakers in the front and 5.25 in the back! don't worry about the tweeter its **** anyway.