Well I'm sure the box id be getting would way more than 50lbs if its 5 cubes, and 2 of the level 3s would weigh 40 pounds together. And the amp I'd give em would prolly weigh in the 20-25 pound range. (most likely) but there are powerful amps that weigh less than that... The first extra battery I have weighs 50 something pounds... And add somewhere from 50-75lbs for the XS. I guess we'll see how the car does lol I think it'll be able to carry the weight. I was going to dynamat the trunk but now I've changed my mind, thatd add a lot more weight.