I tested the tweeter series in my 99 3000gt sl before i sold it cuzz one tweeter sounded like ass so i was gonna disconnect the one and so i could run the music better...well, the door speaker then sounded like ass...samething happened when done to the other side. So i said forget it and just kept the tweets hooked up. They seem to blow easy cuzz one of my 98 vr4 tweeters seem blown as well...i think upgrading with the jbls would be a wise choice.