At The Black Box, it's all about the music. Denver's devoted home for underground music is designed to encompass the total sound system experience. The dual-room (18 ) venue is fully equipped with powerful, state-of-the-art Basscouch Sound. A haven for artists, audiophiles, and partygoers alike, The Black Box is headquarters for Colorado's underground music community. The Black Box is fully equipped with a custom Othorn / Funktion-One / Tannoy combination system built by Basscouch.