How can these six-inch-long, three-quarters-of-a-pound speakers emit such loud, clear sound? And without cables? It helps that they’re created by industrial-design superstar Yves Behar and manufactured by a company, Jawbone, known for its diminutive but powerful Bluetooth earpieces. The speakers, called the Jambox ($199 at Odin; 199 Lafayette St., nr. Kenmare St.; 212-966-0026; available November 14), can wirelessly receive audio signals and phone conversations from laptops, smartphones, and other Bluetooth-enabled gadgets. All that techno-wizardry comes in four equally handsome styles.