NOT HAPPY! 3'rd MacBook Pro 15"

I am sooooooo tired!! This is the THIRD Macbook Pro I have had in 3 months! The other two died due to logic boards failing, or I suspect. the video card. But that does not matter. So now I have this third NEW MacBook Pro 15", and the right speaker is fuzzy. It still works, but is fuzzy/distorting, what do I do??? Get number 4??? This is getting to be a total pain in the ***! My oldest MacBook Pro is 9 years old! And still works fine! What would you do? I am so frustrated, I am so tired of returning these computers, I am convinced Apple is having their CHINESE factories on overtime to fill demand, that quality control has gone out the window, not that China HAS any quality control, but I spent $1800.00 for this computer, and I am fed up! What would you do? I'd LOVE to know!

David