[thelord]

If you can get the jbl 1004 amp, nothing like that.
But in case you are on a slightly lesser budget, then I'd suggest you get a Blau MKII special or a Kenwood 4 channel amp for 5-5.5k. Connect the 4.1 components and the sub-woofer with the amp and power the rear-speakers from the head-unit.

[S.I.N.G.H]

but wont that kill the output of my rear speakers?

[maglev]

Originally Posted by S.I.N.G.H

but wont that kill the output of my rear speakers?

Since you are the one who is going to drive the car, your focus should be on the front sound stage and not the rear.

Hence it will not make much of a difference as the fader ideally should be favouring the front sound stage.

[greenh0rn]

Originally Posted by S.I.N.G.H

but wont that kill the output of my rear speakers?

Do you intend firing rear speakers straight off the HU? If yes, then no need to worry. You will hear ample sound from the rear if the gains for front speakers are set properly and fader is set to 0.

It is of course an altogether different matter that people here (including me) prefer sound coming only from the front direction (you don't sit/stand in a concert with your back towards the stage). I feel that a minor hint of sound coming from rear could be strategically used to add ambience and depth to the stage, but this is difficult and complex- a tad too much and you ruin the front stage completely. There are of course better techniques to use rears strategically, like bandpassing rears with LPF at 3khz and HPF at 125 hz (or a variation thereby). Not sure if the coaxes like this bandpass treatment.

[S.I.N.G.H]

@ maglev and green horn- thanks

after the illusion 4.1 upgrade, i would soon change the amp.