With KEY, Master Audio wants to offer new possibilities and specially help to make a statement: never more your budget will compromise your sound quality! KEY Acoustic Systems are perfect for delivering flawless sound at any venue, offering excellent reliability thanks to their engineering and carefully selected components. They offer multi-purpose, full-range systems that can also be used as stage monitors and a compact subwoofer to enhance and complement bass response - all with the absolute reliability of a product “Made in Spain”. KEY opens the door to professional sound. KEY. Unlock the beat! Finish Multilayer plywood - Front steel grille with foam - Black matte ecological paint.