Had this box custom made for the back of an extended cab 1996 Ford Ranger. 5cu ft i believe, tuned to 32hz ... carpeted.... big box, but it did a 135.9 w/ 3 L'7s and 700 watts ... this box would have no problem doing 140+ with the right power .. hit lows HARD. good street beat box if you have the room. Box is in the oklahoma panhandle. no shipping, local p/u. $100 .. can get pics of someone is interested..