COMPLETE BUILD 8” Custom Ported Home Theater Active Subwoofer for 40USD 

I spent part of my weekend putting together a custom subwoofer as a gift for a friend. It came out AMAZINGLY well, especially for the price. Using an old amplifier from a worn out Yamaha, I was able to put together a seamless box perfectly tuned for an ideal sound from an 8” Dayton Audio driver. It easily fills his open floor plan living space (~600sqft) with a small footprint.
Here are the parts I used in addition to the free amplifier if you want to try something similar:
www.parts-expr...
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If you also need to pick up an amplifier to pair, this is what I would suggest:
www.parts-expr...