Hi I have a tempest based subwoofer. It is a monster about 4' high and 24" round. It is in a cherry veneered sonotube tuned to around 17 HZ. It is also in Alberta Canada. I really can not ship it, but I would be happy to meet a buyer in Edmonton. It is presently located in Lac La Biche. Lets start at $350obo CAD. Ted Polzin P.S I can get pics but not until this weekend.