There are some amplified subwoofer that it pretty compact. There is the Infinity basslink, which is less than 1 cu feet , our truck is like 13cu ft in comparison. There is the bazooka El series and RS series basstube, and there are amplified version of that. I just talk about the amplified one because they are really a easy set up and can go with the stock system. I have the Bazooka EL series for sale in the classfied section, go check it out.primera04 said:Hey i just picked up a new G20 and i want some subs but i want to save some space in my trunk. is there a good way to do this?