i was given some jl XR650-CXi with a tweeter that makes no sound with the wrong crossovers, they are to the XR 3-way components. currently running alpine sps-600c components with two channels from a JL 300/4. The mid bass on the alpine sucks. the crossovers on the alpines are attached to the driver. so what passive crossovers can i get to match the jl drivers to the alpine tweeters???