Tuning Questions >??????

[Spddracer 10+ year member]

I am a little confused about tuning , Whats is the effect of tuning a box to 20 versus say 40 , What are the diff in sound coming out ?? What would a box do at 20 that it wont do at 40 ?? Is it that at 20 it just is louder on lower notes ?? or what , Please explain as best you can //content.invisioncic.com/y282845/emoticons/confused.gif.e820e0216602db4765798ac39d28caa9.gif I have always ran sealed boxes and donth ave much experience with vented

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[Spddracer 10+ year member]

Originally posted by Jmac 20 would be louder @ the lower frequencies, but quieter in the 40-80 Hz range. Also, the 20 would be able to handle more power at lower frequencies. A lot of people, myself included, would recommend porting in the 25-35 Hz range to get the best of both worlds. No point in going down to 20 Hz since no music actually goes that low. The lowest of the low songs go into the low-30s/high-20s.

Ok how about this one , Should you use any polyfill in a vented enclosure ? If so how much ??