When you are replacing the tweeters on your Acura TL the tweeters are in parallel with the door woofer wiring. There is no crossover in place for the tweeter instead it uses a capacitor to filter out lower frequencies and not damage the tweeter. When you replace this tweeter you will either need to run new speaker wire from your crossover to your tweeter or you can use our harness.
This harness comes with a aluminum electrolytic capacitor that is rated for 100v and 15uf brining the crossover point to right about 3500-4500hz for tweeters of 2-4 ohms. This means you can safely install your new tweeter with ease and not having to worry about running any new wiring.