HI there i am new to the forum

someone can make a bluetooth stereo headset and a program for 6600 which will send the stereo signal to the headset as 6600 support sound transfer over bluetooth not a great idea?

It is a great idea, but the 6600 only has mono output, so the best you could hope for is pseudo-stereo.

Since you are new, let me introduce you to the search functionality of this forum.

Look in the top menu and you will find a clickable link called 'Search'. Click it. You will be taken to a page where you can type keywords, for example 'stereo bluetooth'. This will give you lots of information that answers your question. I suggest you try that.