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
) :
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
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.