Anyone can recommend what i should change ?
or a place that has done a gtr before ?

I think all the good places can do your precious GTR bro.
As for what to change, it depends on what you want. Could be a rm90 tweeter to rm100k of hi end stuff. Up to you.

Stating a budget would be nice.

about 6-10?
so im thinking i should get tweeters, amps woofer and maybe change the speakers?
but continue using the old headunit.
but im thinking bout how to change the mid back part where the current stock woofer is.

U mean 6-10k izzit? With tat budget can get a decent component set(tweeter+speaker), amp. U can contact howiechoo (ea autoworks). Sure he will giv u some idea about it.

assuming 6-10k budget.

can opt for a processor since you want to use back old HU, decent component unit + 4 channel amp + subwoofer
old speakers can either use back with fader or just remove to sell or something

dont think i should change the old headunit cause thats the one used to display all the other info also.
the car comes with a built in hd that burns cds into it automatically. anyone know how to delete things inside? everything is in jap.

so i guess i just need an amp, woofer , tweeters? maybe stick to stock speakers for the time being?

if you have the budget, might as well change them all (doesnt mean need to throw out/away the stock speakers) to have a balanced setup

sorry when u said opt for a processor earlier.. what did you mean by that?

a sound processor, something like:
http://underground.alpine-usa.com/pulse/122

http://www.alpine-usa.com/product/view/pxa-h100

few kinds of processors u can use to improve the sound from the factory head unit before going to the amp.
u should be able to change the speakers to component set, add a good amp and do a custom sub enclosure with your budget

Hi Quazacolt, the alpine processor PXA-H100 in ur link can use for all type of stock HU before going to amp??

If let say i have changed to an aftermarket HU, the processor is not usable anymore??

Thanks.

the picture there got show "to HU" i believe

This post has been edited by Quazacolt: Aug 15 2012, 10:04 PM

i suggest dun put a half feature processor....instead, get a good signal converter....link it to amp...get a good component and a good sub...done...