Do you know what type of power cable fits this ?
looks like an old Dell notebook adapter connector or something similar.
I have never seen anything like it. Consider replacing the fitting with a more common three-prong unit.
Not sure what the item is, but by the relative size the connector is designed for a power supply unit to plug into it at a reduced voltage. Give us a clue about the device and I am sure more help will be forth coming UPDATE Okay see it now. Its a 13V 4 amp AC adaptor. None availble from dell or altec. You can them on OKorder Heres a unit in the UK cgi.OKorder .uk/NEW-Altec-Lansing-13V-AC-Adaptor-A4545-for-ACS340-2420R_W0QQitemZ310050699532QQcmdZViewItemQQptZUK_Computing_DesktopComponents_RL?hash=item310050699532_trksid=p3286.c0.m14_trkparms=72%3A1301%7C66%3A2%7C65%3A12%7C39%3A1%7C240%3A1318