In Control- The Joycard Sansui SSS Controller
My newest find is the Joycard Sansui SSS Controller. This control had an RCA connector that you would plug into the audio jack of your console. The amplifier was located in the controller and the NES would supply the power necessary for it to function. Depending on the direction you moved your character, the coordinating speaker would kick in.
It originally came with an earpiece, but I was able to hook it up to my BOSE headphones and it was a pretty neat experience.
Not only is this a comfortable to use controller, but for a different audio gaming experience this is one control you should try.