4-channel amp -> active crossover or rear channel?
I have been upgrading my system piecemeal since the beginning and I'm up to the point where I want to replace the stock speakers. The carputer is up and running, and I've put in a pair of 12" subs on their own amp.
Here's the question:
I have a JL 300/4 running all four channels for the in-car (stock) speakers right now. Should I get a pair of components and run an active crossover*, leaving me with no rear channel OR should I run a passive crossover**, keeping the stock rear speakers OR should I get components up front and coax in the rear?
I hear active crossovers are hot *****, but would it be worth losing the rear speakers?
* - active crossover, as I understand it, is passing the audio signal through the crossover before the amp, thus requiring 1 channel for the tweeter and 1 for the woofer for each of the right and left channel, for a total of 4 channels for just the front speakers.
** - passive crossover would be putting the crossover after the amp, allowing 2 channels to the fronts (R/L) and 2 to the rear (R/L).