Re: what is needed to go active
The basic requirements are an amp channel for each driver and the ability to hipass/lowpass each one electronically. That can be done with the filters built into the amps, or from the HU if it has that capability, or with external crossovers, or a combination of these.
But as trumpet said, component speakers are designed with the passive crossovers that blend the drivers as a set. You don't usually get much improvement by eliminating them. People normally go active when they're using "non standard" speakers like audiophile stuff that's not made for car audio.
What is it that you expect to accomplish?
1999 Buick Park Ave Ultra
Head Unit: JVC KWHDR720
EQ: Audiocontrol EQL
Front Stage: Hybrid Audio Technologies Imagine 5.25 mids, Morel Maximo tweets
Sub Stage: Boston G3 10", 0.5 cu ft sealed
Amp: PPI Phantom 900.4
Rear Fill: Boston SE953 6X9's