Featuring a hemp cone, 1" voice coil and lightweight 15 oz. ceramic magnet, the 4 ohm Eminence 620H offers 20 watts of warm, full, and clean tone that will make a small, thin amp sound bigger and fatter."The 620H is the little brother to the 8-inch 820H," said Anthony Lucas, Eminence tech support specialist. "The 620H sounds cleaner, warmer and fatter, with better definition than any stock 6.5-inch speaker you will find. A perfect upgrade to just about any small amp on the market..."