- Mr. Tan Williams Ltd
- Famous China Made Tube, Amplifiers.
- Address:Apartment E, 38/F Block 5, Rambler Crest, Tsing Yi Island Hong Kong Hong Kong Hong Kong Hong Kong
- Agora International Company
- Tube (Valve) Amplifiers, SMD Services, Radios, Recorders.
- Address:Rm. 1115, Blk. B, 94 Tokwawan Rd.
1