Prerequisite:
The factory speakers in the 1G are terrible. The 2G Infinity systems more than double the power but there is more distortion than an aftermarket amp has and as a result it plays hell with the front speakers. Aftermarket speaker replacement is tough in that many options will fit but not perform well. The biggest complaint is the lack of volume that many options will create. This is a tested and proven option for these systems.
I have the
Diamond Audio D-661 component speakers in my Stealth and love them (stock Infinity System with a newer Infinity HU). So I tried the cheaper version of them the
D-361 . These were going into a 99SL with the factory infinity system.
The first thing I noticed was the crossover was smaller. (see pic) A good thing. The 661's and 361's needed new holes to be marked and drilled. (see pic) The holes were drilled very close to the edge of the speaker housing. It might take another 5 minutes to do this. The speaker was then mounted. So obviously one wants to compare the left D-361 and right stock infinity. Surprise the speaker is louder and has more bass then the other side.
The next step was to make a small 4 wire harness so that the crossover could be used for the tweeters. I have some shrink sleeve around so I used it on the harness. The harness was used to pick up the tweeter output and feed it down to the crossover and then back up to the tweeter.