Active vs Passive Crossover
 

Whats the difference between active and passive crossover in simplest terms?

A Crossover allows you to filter out a range of frequencies below or above a designated cutoff point.

active implies the crossover is applied prior to amplification.

passive implies the crossover is applied after amplification.

each have their benefits. (just google to read up on them, or use the search function here)

What do most components come with and which one is better?

people will have their preference on which is better. but each have their advantages.

active allows more tuning possibilities, but then you need more channels for amplification.

instead of using a 2 channel for your front components, you would then need a 4 channel. (two channels for tweeters, two channels for mids)

a passive will split the signal after amplification allowing for only two needs channels.

if you have the processing capabilities to do so, active also allows you to time delay your tweets separately from the mid.
also you have a greater amount of control over the attenuation of the tweeters in comparison to the mids.
again just allowing more fine tuning to your taste.

so basically..
passive setups are just fine though and much more affordable.
active just allows more tuning capabilities.
unless you are going for a pretty indepth higher end system, just stick with passive.

and components may or may not come with passive crossovers.
active implies the crossover is being applied before the amps in the chain...so it would just be speakers. (you would need an active capable headunit or processor).

active comes with great precautions, not like passives..active is like a raw sound, not like with passives you can control the frequencies..imho

a raw sound? what do you mean you can control the frequencies with passive?

How about electronic crossovers, such as the MTX slx2 ? I'm gonna be using it along with my passive x-overs on my front components.

sorry about that bro, i mean passives acts as filters, without passives make it an active(components for example, raw drivers)..

tunedx, apply the keep it simple stupid rule here. A passive system is going to be far easier for you to install, be far cheaper and provide you with a highly predictable outcome. Throw the savings from going active back into a better set of front speakers. You like rear speakers, nothing wrong with that at all. Just don't go overboard on the rears, keep it to something that is going to complement the fronts and not detract from them.

i completely agree^