PREHEAT oven to 350ºF. Grease and flour 9-inch tube pan or fluted tube pan. Chop 6 of the chocolate squares; set aside. Beat butter and sugars in large bowl with electric mixer on medium speed until light and fluffy. Add eggs, orange zest and 3 Tbsp. of the orange juice; mix well. Add flour and baking powder; beat until well blended. Stir in chopped chocolate and the cranberries.
BAKE 1 hour to 1 hour 10 min. or until toothpick inserted near center comes out clean. Cool in pan 10 min.; remove from pan to wire rack. Cool completely.
PLACE remaining 3 chocolate squares and remaining 2 Tbsp. orange juice in small saucepan; cook on low heat until chocolate is completely melted, stirring frequently. Drizzle over cake. Let stand until glaze is firm.