I OWN A ALPINE SPR-13S COMPONENT SYSTEM FOR MY FRONT DOORS AND A PAIR OF ALPINE SPR-69C REAR DECK SPEAKERS, I WANT TO CONNECT AN AMP FOR ALL THE SPEAKERS, WHAT KIND OF AMP SHOULD I USE? IS IT A GOOD IDEA TO KEEP THE ENTIRE UNIT ALPINE? I DONT KNOW WANT TO SPEND TOO MUCH FOR A 4-CHANNEL AMP, PLEASE LET ME KNOW IF THE Alpine MRP-F300 DELIVERS ENOUGH POWER FOR ALL FOUR SPEAKERS? SHOULD I GO WITH A MORE POWERFUL AMP?//content.invisioncic.com/y282845/emoticons/confused.gif.e820e0216602db4765798ac39d28caa9.gif