A:AnswerThe cost of the amplifier and speaker wire and the time to install it. Don't waste money paying somebody to install a small amp. Just pull your dash open and find a good power and ground. Should not need anything greater than 12 gauge wire to power the amp.
A:AnswerIt all depends on how your system is wired up but yes it could get complicated. easiest thing to do would be to replace your factory radio with an alpine unit and this amp... that would make for a very simple install for you.