SLS-300,
300 mm (12") Subwoofer Driver
If
you are obsessed with extremely low bass, then the SLS-300 would
be the subwoofer of choice. It is recommended for very low bass
in a sealed box enclosure. The most noticeable physical feature
is the magnets (which are approximately 100 oz together) used
to power the subwoofer. Hidden within, is a massive 65 mm (2.6")
voice coil. The suggested operating range is 27 to 550 Hz.