MARBLEHEAD – Marblehead High will host a Battle of the Blends: an evening of a cappella music with the semi-professional group Custom Blend and local favorites Luminescence and the Jewel Tones.The concert will take place at the MHS auditorium on Friday, Feb. 1 at 7:30 pm. Tickets are $10 and $7 and can be reserved by calling the MHS Fine Arts Office at 781-639-3100 x 3120.Custom Blend is a semi-professional 10-voice group of adults from numerous Boston-area communities including Marblehead. They sing a variety of music from classical to contemporary.The Jewel Tones and Luminescence have performed with numerous high school, collegiate, and professional groups from across the country and have recently focused their energy on the production of two studio albums. For more information about the performing groups, visit their respective Web sites at www.customblend.org, www.myspace.com/jeweltones, and www.myspace.com/marbleheadluminescence.