Eight x 15" Infinite Baffle Subwoofer: Bassotronics.

My 8 x 15" IB subwoofer playing Bassotronics "I love you". 600 cu ft IB enclosure. Eight Acoustic Elegance AEIB15 low distortion drivers. Easy 130dB on 40Hz+ test tones. Right off the top scale on RS SPL meter! Video recorded right inside the enclosure. You'll need a good subwoofer to enjoy this properly. No silly, over-driven distortion on the camera microphone! Just clean, deep bass right down to 8Hz. This subwoofer was built for enjoying realistic, classical, pipe organ music at home. Plus films and other kinds of music of course.