seikaku.hk
SEIKAKU Technical GroupP.A. AMPLIFIER,MEGAPHONE,AUDIO PROCESSOR, P.A.SPEAKER, WIRELESS SYSTEM, CONFERENCE SYSTEM, DIGITAL TECHNICAL SOLUTION,SEIKAKU Technical Group was founded in 1985, is a professional company that designs, produces, sells and services PA (Public Address) System, and speakers; Production factory locates in Dongguan City, Guang-Chou Prefecture, China.
http://www.seikaku.hk/