I bought one when K-Mart blew them out for $30. I used it to compute loudspeaker response curves based on an equation that I found in a book. I remember that I

I bought one when K-Mart blew them out for $30. I used it to compute loudspeaker response curves based on an equation that I found in a book. I remember that I couldn't get the cassette interface working, so I simply begged the family not to unplug it.