sub bass system

Hi All


I had build a subwoofer some time ago where the speaker do point to the floor and spread around, because it did act as a slot.
I have change some things.

Have set wood parts in so the opening is not the same enymore but gradual widening around from wide to small. So I get no more strong notes on
frequencies who match with that slot.

Now bass higher region is clean, no boom enymore, the box go without active filter as low as 25 Hz and stops on 100 hz not bad for this small one.
 

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