You will need crossovers for these. These are quality tweeters. The DRTs are a step above their TW tweets that come with their entry level line comp sets. New they are $140 at woofersetc.On those cdt's, do they have a crossover, or is an external crossover not required, like in cheaper tweeters?
If you look them up, the type r's are technically listed as 6 3/4".Hey, do you think the R's will work in a 6.75" speaker opening? My car has 6.75's all the way around, factory.