Friends, who has headphones with the 1/4" maleplug

If you can't find headphones with the 1/4" phone plug you can get adaptors from Radio shack to covert to the 1/4" plug from the smaller ones:

http://www.radioshack.com/search/index.jsp?kwCatId=&kw=phone%20plug%20adapt&origkw=phone%20plug%20adapt&sr=1