audio set-up for beginners [continued]

[junerski]

Do I need to change the headunit of the '09 Fortuner if I install an amplifier and seps?
How far would 10-15k go including deadening the doors? I don't need a sub.

as all audio gurus here would say like si jhnkvn, importante ang headunit sa isang audio set-up for its tuning capabilities... OEM HU ng Fort eh bass,treble lang ata ang adjustment... so i suggest upgrade first your headunit then seps then amplifier.