i have 2 boston pro 12.5lf subs, i purchased 2 and the guy sent me a 2 and a 4 ohm sub. i cannot use these 2 together, and i have not been able to find another sub to match. i want to get my system done so i am going to just run my single 15 kove armageddon. $150 plus shipping on each 12, they are in great shape. dont even look broken in. i tested them and they work.
