I know you have answered so many questions about atlas and avalanches, but I am a newby and I want to make sure that I do it right. I have a Atlas 15" and a kicker Kx650.4. I will be building the box myself. Do you think that 3.5 ft^3 sealed would be good for the atlas with around 325 watts rms?
What would you recommend the ported volume be and tuned to what if I decide to go ported later on? Also since i don't have a subsonic filter on the amp, is there something I can get to act as a subsonic filter? Thanks for all your help!