prototype561 10+ year member
Senior VIP Member
Well I just put 1 18" HDC3 in 6.75 cubes tuned to 33hz in my suv powered by a ap3k. I never had a quality or 18" sub before. My previous setup was 2 15" hifonics brutus on the same power. I was a little relutunct to get the 18 because of the lost of cone area, but to my suprise the HDC3 is just as loud or louder to my ears than my 15's.
Im thinking about buying another one, //content.invisioncic.com/y282845/emoticons/smile.gif.1ebc41e1811405b213edfc4622c41e27.gif but it will be a tight fit.
Im thinking about buying another one, //content.invisioncic.com/y282845/emoticons/smile.gif.1ebc41e1811405b213edfc4622c41e27.gif but it will be a tight fit.