ICE
Hi. sorry for not reply Jason, but just a rough guide
(do note that these may seem exp, but the diff is significant, befitting our ride
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) :
A : No additional headunit
1K+ : Front door speaks + 4ch amp
2K+ : Front door speaks + 4ch amp + rear
3K+ : Front door speaks + 2ch amp + rear + 2ch amp + small active sub
4K+ : Front door speaks + 2ch amp + rear + 2ch amp + 1/2ch amp + 10"sub
B : add a headunit (can be concealed): +1K to the above, but much much better.
I guess most wouldn't want to add a headunit becoz want to use the steering control, but our source (stock) is just so-so sound, so even with good amps, you are basically amplifying so-so sounds, so maybe a little clearer, though much louder, but with more prominent bass if you put in subs. Choosing the B option allows you to 'clean up' the sound, by compensating the so-so stock sound by dsp adjustments, and most importantly to be able to have sound stage control.
Let me know if you want to know more.
A brudder here reco Tye. This is GOOD, but exp. But he got a dam gd ear (Albert) and can make mediocre amps sound much more exp than u can imagine due to his excellent award winning tuning.
I cannot afford, so am going to Autotrend, and then the tuning part, diy fm own experience, tho unfortunately, not award winning
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cos never even take part in any competitions. They are actually quite good in tuning too (Darren & Chin), but just that i am extremely fussy, and also basically am able to to my own tuning fm self study and tinkling w my own n frens stuff...
and if you go to Tye, DON'T EVER TRY TO TUNE YOURSELF. You are insulting their experience and skill there. Autotrend allows crazy people like me to screw-up-my-own-system, if i so chooses too.
so, there u go. Hope the above helps.
(I have no links at all to any shops mentioned, just a 3rd party observance, so dun kill me if i offend anyone/anything.