Kicker 43TCWRT102 10" Slim Car Subwoofer+Sub Box w/Passive Radiator+Amp+Wire Kit
Passive Subwoofer Design | REL Acoustics
Use WinISD to model the frequency response and then see how you can tune a passive radiator. | Passive radiator, Subwoofer box design, Speaker box design
Best Sub under $200? Passive Radiator Sub Build - Excursion Test - Free Plans - YouTube
UniBox - Unified Box Model for Loudspeaker Design
Small PR in bookshelf speakers - Techtalk Speaker Building, Audio, Video Discussion Forum