The QU-181B is a front loaded subwoofer designed for use with Quality series speakers.It consists of a custom 3″voice coil 18″low frequency driver in a compact vented enclosure, optimally tuned for extended low frequency response. Two steel handles are provided for easy lifting and carrying and four rubber feet are fitted to the bottom of the cabinet.The enclosure is constructed with 3/4″(18mm) birch plywood, heavily braced internally, while the baffle is angled to reduce internal reflections and provide additional system effi-ciency. A black powder-coated steel mesh grille protects the drive units from damage. It is finished in black semi-matt texturedenvironmental friendly paint. A rear panel connector plate carries two Neutrik Speakon NL4MP for loop in and loop out connections to additional enclosures.