LilithPaige

Hi there, I brought a Galaxy a couple of months ago and she has a very nice new stereo which is great, but we are going to be doing a very long (12 hour drive) at the end of July so she needs some decent speakers. Can anyone tell me what size speakers I need, both front and back? Is there speakers in the very back... or just the 4 in doors like a 5 seater? Also... how would I go about putting them in? Thank you very much everyone :)