If you already have a Criton 1TD and want to upgrade to the 1TD-X, this package contains everything you need to do so. This kit ships with the new LD25X tweeters and new crossovers that will replace the ones you already installed in your Criton 1TD. You need to have already built a Criton 1TD to use this upgrade. If you need to build a full Criton 1TD-X, please go here.
The Standard Crossover comes with all Dayton Audio components. The Superior Crossover comes with Erse inductors, Jantzen Superior and Jantzen CrossCap capacitors, and Mills resistors.