FE103E which had a really good bass output to 50 Hz, gorgeous mid-range with wonderful soundstage and imaging but a dreadful treble. Almost like AM radio. I gave them about 50 hours and sold them to a fellow who thinks they sound great. Interestingly, when myself and a few friends got thoroughly juiced and played some outrageous techno through them crossed to a Titanic sub at 60 Hz and cranked them all the way up, they were awesome! I'm going to try the FE167E in Bob Brine's FT1600. I can't believe that my experience with the 103's is indicative of good single driver sound.