Dude, with 3 10"s, you will have no problem with that trunk. My only suggestion is, aside from measuring the interior of the trunk, REMEMBER TO MEASURE THE SIZE OF THE OPENING TO YOUR TRUNK. I designed a box that fitted snuggly in my car...only to find out that the box wouldnt even go in. Live and learn.

But for 3 10s, it shouldnt be hard at all since you wont be having a tall box.