Webster defines Spectrum as a "series of radiations arranged in regular order" or a "continuous sequence or wide range". This could not be a more appropriate description of the group Spectrum, which draws upon the talent of four radiant voices and diverse personalities to form a First Class Vocal Quartet. After spending six stellar years recreating the sound and style of the Four Tops in Las Vegas' multi-million dollar production shows American Superstars and Legends In Concert, the group has developed the versatility to credibly cover the music of groups from the Mills Brothers to the Temptations to 'N Sync. It is this versatility that has propelled them to status of headlining their own shows, in which they perform stirring renditions of all the best cover tunes. Spectrum recently returned from a seven-month stint in Europe only to begin a short domestic tour in the southeastern U.S. Both tours were highly successful and were rebooked for future engagements. Spectrum presently performs nightly except Mondays at their home-base venue, the Boardwalk Casino on the strip in Las Vegas.

The group boasts four incredible singers, each with the voice of a solo artist, who combine their voices and dexterity to create the angelic harmonies and deft choreography that have become trademarks of Spectrum. The members of Spectrum consist of silky smooth recording artist Darryl Grant of Oakland, California, singer, pianist and windy city favorite Freddie House of Chicago, multi-talented singer David Prescott from Rochester, New York and lastly, singer actor and group founder Cushney Roberts, who left the life of a Princeton-educated corporate engineer, cut his teeth in the casino lounges in route to becoming a well-respected Las Vegas showroom entertainer. Let's just say this is a group of well-mannered, college educated, world-traveled veterans of the entertainment business, who will entertain you!