All, I really like the JRC ST-3 headphones. I've had them for over ten years and use them with every receiver that I have. I didn't notice if anyone mentioned it, but they are 600 ohms and a 1/4 inch mono plug. Ron -- Ron Hunsicker 1238 Cleveland Avenue Wyomissing, PA 19610-2102 484-332-1164 610-478-0453 facsimile ronhunsi at ptd dot net