I've read so much about polyfill, and its contradictive. Some say add it to any box, ported or sealed and it fools the sub into an "increase" in cuft. Others say it doesn't do anything, or it makes the box actually smaller. I see people adding 1lb polyfill per 1cuft. Is this something everyone is doing? I've never used the stuff besides what came in prefab boxes, so I couldn't tell a difference either way. Most of what I've read pertains to the box being too small, either due to limited space, or measuring/building f**k ups. So what if the box is the correct size? Do you still want to add some?
I've seen where people not concerned with space issues purposely build the box smaller, and add polyfill to make up for it. I know from personal experience that if you build a sealed box too big for a lower xmax sub, the sub will bottom out way too easy. Yea it plays deep, but it's still limited. So what happens of you build a box small and fill to simulate the box being bigger? Do you still get the "spring" the small sealed box has but with the ability to play deeper, or does the sub handle the same? I've been practicing my box fan skills, building boxes for friends, people from work, etc. I'd like to start charging for the labor as well lol, but I still have alot to learn. Polyfill seems to be an argumentive subject, and its just a matter of opinion. Is there any real proof to back it up?
I've seen where people not concerned with space issues purposely build the box smaller, and add polyfill to make up for it. I know from personal experience that if you build a sealed box too big for a lower xmax sub, the sub will bottom out way too easy. Yea it plays deep, but it's still limited. So what happens of you build a box small and fill to simulate the box being bigger? Do you still get the "spring" the small sealed box has but with the ability to play deeper, or does the sub handle the same? I've been practicing my box fan skills, building boxes for friends, people from work, etc. I'd like to start charging for the labor as well lol, but I still have alot to learn. Polyfill seems to be an argumentive subject, and its just a matter of opinion. Is there any real proof to back it up?
