system for 04 mustang

Im wanting to change up the whole system in my mustang. Right now i have the factory mach100 headunit and mids and highs and two kicker comp 10" and a jl audio e1200. Im running a sealed box i build because of limited room in the trunk. but it dosent sound to great and i want more, thinkin maybe the box.

You might want to look into an aftermarket headunit.  You got to start from the ground up, and the HU is the ground.

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That's my opinion. Take it, leave it, or correct me.

i thought about it but i like its a 6 disc indash. and im gonna try keep it atleast till it breaks or get some extra dough for a indash. What you think about the subs and amp its not alot of power but the subs are 150rms and i think the amp is 220watt mono block if i rember right. Im also intrested in maybe finding a better box, but i looked around and nobody makes one for it.

i vented enclosure  will be louder but "peaked" and blah blah blah. you may have to have one built buy an installer.  you could use a larger amp also.

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You should probably look into a better amp.  220W RMS isn't too much for 2 150 RMS subs (300 total).  Try to get a little closer to 300W if you can.  Secondly how are you getting the amp a signal?  High low converter or just speaker (high) level inputs?

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That's my opinion. Take it, leave it, or correct me.