i ordered it with dual 2 ohm coils. im having a professional car audio store install it and i have a friend who is an experienced audio fanatic and has built many boxes. he hasnt started yet considering it's probably gonna be 6-8 weeks before i even have the sub, but i know he built a box for my friends 15in BL and its the loudest system ive heard. did i overdo it buying the brz2400? whats the rating on the sub, with the options i chose, and how would an "experienced" user adjust to the amp being too powerful?