I checked and found that this topic was not yet discussed. Could you, the tech savvys, help me out? I have: MBA 2011 Yamaha TSS-15 Home Theater 5.1 Surround Sound Connecting using some cable from headphone out to the red and white port on the back of Yamaha amp. Problem: I am getting only 3.1 sound now ie, front left & right, center speakers and woofer are working. Back L&R are not throwing the surround effect. Doesn't the latest MBA support 5.1 SS?