These speakers were sold with a Ultra Sharp Brand Monitors. There is no power adapter for these speakers. Here is a link that may explain. No need for an AC power cord since the AS501 connects directly to the back of the monitor for powersupply.
That is exactly what I am trying to say.... I just received the as501 speakers and need the power adapter as my entry level flat panel monitor does not have the power jack... the PA version uses a power adapter, the speaker bar is exactly the same.
In other words, we purchased a dell e310 with entry level flat panel monitor (without power jack) and later my wife ordered the AS501 speakers not realizing they need the power adapter. My question is: what power adapter do I use with these speakers?