hey guys, this is probably a noob question, but i have an 18" fi q in my car with the bp option. i have it hooked up to a hifonics 1610 1600watts rms, i am running about 1200 (i set it with a dmm). its in a 6.3 cubic foot box after displacement, and its tuned to 31 hz. my question is, why is it that when my doors are open it sounds alot louder than with the door shut. opening the windows helps when im driving, but its getting cold and i wasnt sure if there was anything i could do to make it loud with the doors and windows shut. any help would b great. thanx.

I deleted your thread in the Fi technical section as you only need one.

This happens in essentially every vehicle, with every sub setup. The deal is that you lose cancellation by allowing a place for the waves to escape rather than bounce back into themselves. There's nothing you can do when it gets cold, as this only happens when an opening to the outside is created.

hey guys, this is probably a noob question, but i have an 18" fi q in my car with the bp option. i have it hooked up to a hifonics 1610 1600watts rms, i am running about 1200 (i set it with a dmm). its in a 6.3 cubic foot box after displacement, and its tuned to 31 hz. my question is, why is it that when my doors are open it sounds alot louder than with the door shut. opening the windows helps when im driving, but its getting cold and i wasnt sure if there was anything i could do to make it loud with the doors and windows shut. any help would b great. thanx.

If you want it louder than get a better, more powerful amp and that will solve your problems. Yeah sound travels until it cant no more, so when you open your windows you give sound more area to cover and express itself. When its enclosed in a small area it is cancelled out by the next set of waves coming from the source of the sound.

alright kool, thanx guys and ku40, sri man i tried to delete the other one, i figured this one would get answered quicker.