checkpointmedia developed a subwoofer which, as in regular audio systems, enhances sound reproduction of low frequencies. Unlike conventional standalone appliances, this in-wall system is only 8.5 cm deep, which means it can be integrated into standard drywall constructions. Sound coupling to the air volume in the listening room is achieved by a hole pattern in the front baffle supplied that can also be plastered over. This makes the subwoofer the perfect, virtually invisible addition to in-wall loudspeakers in domestic and public environments.