how much are you spending on cabling ? normally overlooked, and if you like it loud it might be wise getting a capacitor for the amp as i have read that the small Skyline batteries are not up to much, so to much bass could prematurely age it (or kill it),
And if you have a decent head unit there is no need to buy an amp for the speakers.
My old car I used my jl amp rf amp and the standard speakers, then turned the bass down going through them and it sounded awsome -especially considering the cost.
Hope this helps
ps dynamat -cannot remember the name but its the silver foiled back stuff is brilliant, used sparingly
And if you have a decent head unit there is no need to buy an amp for the speakers.
My old car I used my jl amp rf amp and the standard speakers, then turned the bass down going through them and it sounded awsome -especially considering the cost.
Hope this helps
ps dynamat -cannot remember the name but its the silver foiled back stuff is brilliant, used sparingly