Jim Couza and Maclean used to play one dulcimer between them - Jim at the bass end, Maclean at the treble end. And why not?!
PS have you tried playing with fingers (no hammers?) Hint - it helps if the strings are lower tension than "normal" (fingers fare better!) and preferably four strings per course for more adaptability, sound/technique-wise... try stroking them (or "carressing" them as someone once described it!)