Thanks for clarifying that, I didn't notice he said a Kenwood, not the usual Panasonic you see in the 1200's.Neither. It's an odd-ball, that only the 91 used. I imagine a local electronics guru, maybe a ham operator type, could do that. Yrs ago, I used to see a switching jack, that hooked to speaker circuits, adding a couple wire-wound load resistors, and an output to headphones. Haven't seen one of those in a long time.