I own one of those round cardboard tube thingys that has a little
speaker in each end of the tube with a wire and a plug on the wire to
plug it into a radio speaker jack.I bought it about thirty years ago
from a guy whom used to do my income taxes forms for me.I plugged that
thing into one of my radios,I wasen't too impressed with it at all.It
sits on the top shelf of one of my closets nowdays.
cuhulin