RTRG here again with some changes to run external powered speakers and headphones at the same time. now that the tv is here, I found out that the audio out port is useless in practical terms. it is NOT capable of driving powered speakers or headphones with or without a headphone amp. even a 20 watt amp and passive speakers do NOT work. the volume is at max which produces a weak sound. I moved the connections to the INPUT side. the audio comes from my desktop computer connected to the one A/V port. a "Y" is used at that port. one is used for the desktop input audio and the other one serves as the input for a headphone amp. the amp has volume and power switch. the internal speakers can be muted with the remote. this allows one or both to be used together or separately. much better solution.