I tried the free 1" Mi-Horn (I'll try anything once!) on the tweeters of my old Audio Physic Virgo II. Without the Mi-Horns, the Virgos disappear...with them, the Virgos became easy to locate and lost the majority of their imaging. Suffice it to say, the Mi-Horns are now one of the favorites in my 17 month old daughter's toy chest...