After about 3 months that I have the new MB2.5B at home, I can only speak well of these speakers. After a break-in period of over 200 hours these speakers have become delicious. Large opening at the top, excellent bass and medium persuasive. Excellent sound stage and depth of image. After several tests of amplifiers I stopped on a Lyngdorf SDA2175 (200w per channel on 8 ohm and 380 watts on 4 ohm) driven by a Primaluna Prologue 3 preamp. They need good and many watts (it is important to use an amplifier that has good control) to play the best. I don't know the first series of which I have read that many have had some problems managing. But these I can only recommend. Excellent value for money.