My dear wife cleaned up the "music room" (also the spare room with rollaway beds) prior to some holiday visitors. In her usually efficient manner, anything near a box went into it. Took me an hour to find where my RNC was buried, but the AC adaptor is MIA. Of course, now that I post this, it will miraculously appear in a place I already looked for the third time. However... Would some kind RNC owner take a gander at their RNC wall wart and let me know if it is + or - center conductor?? The unit specifies 600ma but not polarity, so I am stuck in better not chance it land as far as polarity. The manual doesn't address it, and while it may have diode protection, I'd rather be careful than sorry. TIA!!