- Dongwon Telecom Co.,Ltd.
- Address:1070-5, Shingil-Dong, Ansan-Si,
- shinsung communications, inc.
- Address:ilsan techno town# 624, baekseok-dong, ilsandong-gu,
- NODS GUITAR
- Address:Mapo
- Stk Professional Ltd.
- Address:369-1,Gurae-ri,Yangchon-myeon ,Gimpo-si
- AUDINST Inc.
- Address:# 660 Jooan Sibeom Gongdan, 17-1, Jooan-Dong, Nam-Gu,
- GT amp. Ltd
- Address:305-902, DongA-3rd, Yeomchangdong
- Hansae Mechtronics Co., Ltd
- Address:RM 502 Technotel,969 Dowhadong Namgu
- Belcat Co., Ltd.
- Address:Belcat bldg
- Saerim Electronics Co.,Inc.
- Address:Rm104 Daeryung techno town-I,Gasan-dong ,Geumcheon-gu
- Emc Solutions Inc.
- Address:Rm# 611 Hyundai 41 Tower,Mok 1-dong ,Yangcheon-gu
- Tuk Soo A.V Co.,Ltd.
- Address:449-8,Dogok-dong ,Gangnam-gu
- MD Electronics
- Address:8, Inhyun-Dong, Joong-Gu
- Inkel Corporation
- Address:345-50,Cheongcheon-dong ,Bupyeong-gu
- Woosung Chorus Industries.
- Address:Cheongcheon 2-dong,Cheongcheon 2-dong ,Bupyeong-gu
- Dasan Elecrronic Co.,Ltd.
- Address:1271-11,Sa-dong ,Sangnok-gu, Ansan-si
- Kortcom
- Address:3F I-MAX Bldg, 196-37, Anyang-dong, Manan-gu,
- Inter-M Corporation
- Address:226-9 Dugjung-Li, Hoechun-Eub
- MGV
- Address:Room 409, Block A, Jung-dong
- Line-Tech Co., Ltd.
- Address:3F,Simgok 2-dong ,Wonmi-gu, Bucheon-si
- Kom & S Corporation
- Address:Rm.1501,Gwanhun-dong ,Jongno-gu