well since my front stage is what i am focusing on more, i will be powering the front speakers to their own channel and pairing the rear left side to one channel and the rear right side to one channel. well my amp is 2 ohm and 4 ohm stable so im not too worried about that. thats one thing i like about the amp.

 

Putting two identical speakers in parallel such as 4 ohms will for practical purposes yield a 2 ohm load. It should be close enough for two non-identical speakers but keep in mind that since they are not identical they may well influence each other.

Even though not an exact comparison think of this like a hydraulic system. You have a master cyclinder which you split into two paths feeding two different size slaves with different return springs. What occurs when the pressure is released? The fluid is returned by spring pressure at different rates to the system, one slave will affect the other and maybe even act as a master to the other one.

Ideally speakers in parallel should be identical with the same counter emf characteristics.

 

Thanx guys! I'm gonna go to car/audio shop today and hopefully will schedule installation for this week! Thanx again!
PS. anyone knows dimemsions of the stock amp?

 

very very very small, i dont think you can fit an Aftermarket amp in there