Hello , long time never post mesage liau.. anyway regarding hobby--> business

1. work at a company where it provide audio systems for people.

2. learn how to at least built a audio system. Then, take note of the company partners "(may be ur future partner)" that are involved. Get to know various kind of audio products from amplifiers to cable types. You can see theres the japanese stuff and the american/german/italy stuff.

3. from time to time, experience will come and together with ur interest, then only try to look out for partners to do this king of stuff. Now, at this stage, comes the business part, this has really nth to do with ur interest. The only thing interesting is the money that you can earn form ur work.

If you have an engineering degree in electronics like me, it can be an advantage because good sound system has good amplifiers. Amplifiers are a very common thing when you are studying electonics.

Hope this will help.

http://www.lhm.net.my/profile.htm

Companies like this is a good platform for a career.

There are more audio system companies in Malaysia. You can try Kenwood electronics if you are damn good in technical stuff. Design noiseless amplifiers for car audio or home theater system.

Also, you can also go in to trading (sell audio systems).

Still, it all boils down to some determination.