Fair question as I installed those sweet little tweeters into an LX that had no wiring to the location. I sent the main speaker output power FL and FR to a set of Infinity cross-overs left over from some long gone project. Very easy to send the power to the respective speakers with HI/LO outputs. LO ouput soldered back into the factory wiring. Tucked crossovers and new tweeter wiring under the dash and used zip ties to secure. Ran the new tweeter wires up to the pillar. My head unit is nothing special, a JVC JVC KW-R910BT.Hey Scoupe, how did you cross those over?