hi ! my name is yves and it is my first time writhing to a forum and my english is not so good, so please be patient because i do not write very quickly ither thank you ! so here i go, i just bought a 2008 honda civic dx-g witch comes whit a basic alpine honda system.
so ! honda says to upgrade i should perchess what they call a bas work system witch is to replace the back speakers with a litel bigger speakers and add an amp type thing that connect directly in the back hove my radio.

so my questions are
1-did any one ever removed one of these radio to see what is in the back

2-how can i get a good sound (high quality and a bit of power like 400 rms ) with this stock radio

3-always with stock radio i would like to no what is the best quality equipement to buy under 800 dollars if that is posible (speakers ,sub,amp,)

4-do equalizers still exist

5- where is the best place to buy this equipement