- Samhyoung Electronics Co., Ltd
- Amplifiers, public address system,6cd-tuner amplifiers, powered mixer, s. R system, speakers,Power Supplies,Professional Audio, Video & Lighting.
- Address:1378 Jeongwang-dong
- Firstech Electronics
- Karaoke Amplifier,Powered Mixer.
- Address:Korea Polytechnic 2 College Hightech H509, 39-1, Gusan-dong, Bupyeong-gu
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