Was doin some research on HDC 3.0 and 4.0 for wife's car. Came across it. Just purchased them 2 days ago. They were the 1300.1' not 1800.1, mistyped, sorry. Gonna run 1 to each amp and sell other 2 to a friend till my my 2 ct sounds 1400.1 come in, then the 1300's will go in wife's car with 2...