Hey guys, I'm thinking about getting the sub/amp upgrade that goes under psngr seat. I've been dealing with the stock system for a while but its just not enough. I def don't want to put any box in the trunk so I figure the best way to go about it is to get the flat sub you get from subaru and put it under the seat where no one can even see it. My question is, is this sub somewhat decent I mean will it improve my system good amount. Of course I'm not expecting thunderous car shaking bass as I dont even want that. Kindly someone suggest me pls.