Just to clear up some confusion, the speakers in a factory monsoon system are actually bi-amped, where they have two sets of inputs going to each speaker. They use the 6x9 as a woofer for the lows and then have the tweeter for high frequencies. If f you were to hook up a new speaker with only one set of inputs on it, you would have to chose between only low or high frequencies. This is why Crutchfield is saying to splice into the rear speaker wires before they go into the amp. Before they amp there is only two rear speaker wires, where as after the amp there is four wires. Since the amp is underneath the rear deck pad and you have to remove that anyways to replace the speakers, just replace them and then figure out which wires are the rear speakers before the amp and run those to the new speakers. Will sound much better than the factory monsoon speakers. If you want it to sound even better then you could run those wires to an amp and then back to the rear speakers.
