its possible, but its MUCH MUCH more expensive. It will cost you an additional $150 to add sound after the saber is built. my suggestion is to save up a little bit longer and buy it the way that you want it the first go around.
That's what I would suggest too. This way you would only have to wait for it to arrive once as well
![Grin](http://saberforum.com/Smileys/default/grin.gif)