In case you have packed AP , Do put packets of Silica Gel in the box and when you come to India , play it for some time and replace the packets with new Silica gel packets . Dont worry about it getting old / obsolete , in audio world its called as Vintage .
Since you are staying for approx 12 yrs , you can invest in a good gear unless budget is a constraint . This is a long period and why deprive yourself of listening to good music (unless its one or two years) .
Look around and build a system over a period of two years just like you would do if you were in Kolkata . For a temp period go for some budget active speakers and use your phone to stream . or just use your laptop and attach some good speakers to it
Try brands like McIntosh , parasound etc which are American . Don't miss this opportunity to explore HIFI which is available at affordable prices compared to India .