Building a Small Subwoofer - Plays down to 33Hz!! - by SoundBlab - YouTube
SideKick-L 3.5
Tang Band W2-2040B - 2" Passive Radiator
Passive Radiator - TB SPEAKER CO., LTD.
Bundle - TB SPEAKER CO., LTD.
Parts Express on Twitter: "Quite possibly the smallest self-contained subwoofer system, Tang Band's T2-2181SA pairs a long throw 2" driver with a high excursion passive radiator in an ultra-compact enclosure allowing you
Passive Radiator 6.5inch Subwoofer Build Plan | SoundBlab