The al-4-sb is a suspendable subwoofer designed specifically for use with the al-4 subcompact line array system. Benefitting from the same advanced isobaric loading found in our formidable as-418 subwoofer, the al-4-sb extracts exceptional low frequency output from a compact and easily flyable package. When combined with an al-4 line array system, the al-4-sb delivers powerful and well defined low frequency reproduction down to 45 Hz. The al-4-sb can also be used along with additional ground stacked VUE subwoofers to further extend low frequency response and increase overall system output.