is a specially-designed speaker system for individual musicians who are playing in a poor environment. AK series feature deep and powerful low-pitched sounds from 3” medium-size compressed driver and the power of 190mm strong magnet in spite of a small speaker system. Manufactured with HAMMER SPEAKER’s special coating method, a 310mm unit is stable and not damaged by long hours of playing, and its surround softness shows the smooth and fantastic control in terms of strong low-pitched sound playing. Its suitable 1.75” high-pitched sound-compressed driver and accurate network design superiorly play sounds in order for audiences to be able to be fascinated by acoustic performance surrounded by plentiful low-pitched sounds and natural and clear performance. Also, an enclosure designed with specially-bonded plywood controls unnecessary resonance for stages. The powerful sound of AK-12 starts from other models manufactured by our design and is well-received by a lot of musicians.