I have one similar to the smaller unit listed on the right side of the page on weblink you provided. It's from a different manufacturer, but it worked fine for me this past Sat. night when i used it for my HD-P2. One note, the smaller unit (and maybe the larger one) comes with interchangable tips so you can easily find which one you would need for your deck by just trial and error. The one I use has a white inner ring for the connector to the unit, but I'm not sure of the exact size. make sure the polarity is set correctly to positive though when you insert the tip into the connecting wire, using negative polarity would be bad thing for your HD-P2.