Making my sub box and am rack

So I just got back from a month long job in Australia and like an idiot I realized I didn't disconnect my battery so it was dead. I got one of those portable jumper things, pluged that up, started my car, and noticed a HUGE change. No bass. Frigg. My JL Audio HD1200/1 is dead. Fuses are all good, power goes to the amp, but it doesn't do a thing. Saving $300 bucks on the price was great at the time, but it'll probably cost me 300 or more to fix it since I didn't buy it at an authorized online dealer and will have to pay out of pocket. Ugh.

 

Huh ? Since you not bought from Authorized dealer even when it brand new and they not going to fix that for you . Bummer , i bought 2 JL amp on ebay tried to save some $ but you scared me when that happen to you. I need pray to God that nothing wrong with my amp when i hook them up

P.S: I have a regular cab and going to build the sub box with the pair of 6x9 and 10" sub on it. Can i use to measurement for that ?.

Please, be advised

Thank you