Apogee Duetta signature2 Heavily modified These have the latest Graz ribbons both tweeter/mid and bass panels. I have external cross overs with mundorf silver/gold in oil caps and Alphacore foil inductors. Caddock resistors and all solid core silver wired. All suspended and vibration free. These apogees take much more power and go way louder and have much better dynamics than the original. Not only that but much improved sound quality. Simply stunning! I have had many planars magnepan etc but these really are the best in every way now. Long live Apogee and Thank goodness for Grazs search for perfection!