Although the 600 and 650 start from the well-known sennheiser sound signature, each one has its essence and particularities, already decided on which one I would buy, sennheiser shows that there are still many people working on the 6x0 line and launches the 660. After following the Reviews and comments, I made the decision according to my personal taste.
I was looking for a sound that most closely resembles how it feels to sit in the middle line between the stage and the final part of the concert, in the case in the middle of the audience. When calculating the acoustics of a room, there will be places where the reverberation will be perfect, and the resonance would fit your ears as if the band or orchestra were playing just for you. The central is the main voice of the band, which comes right in front of you, the more you feel about the music, the more you perceive the instruments. The man at the table has to know how to equalize the sound for the show, if not the best voice and instruments, they will be very bad. Being well equalized, the right thing is to make your voice stronger and sweeter than the most strident instruments, with which the instruments are completing harmonically with the main voice. Engineers who know what they are doing, can make the headphones reproduce as realistically as possible a concert, thinking of the acoustics, the well-positioned band and equalized sound. A great engineer already manages to make the concert hall seem to have the best acoustics, the band is well positioned and mainly, the instruments do not stand out to the main one, that is the voice of the singer.
I feel it on the HD650. Congratulations Sennheiser! As an Architect, I like to greet a team when doing a great project.
Ps. The photos and videos of the HD650 can not do justice to opening the luxurious sennheiser box and seeing the King in that unique painting that harmonizes with the tone of the black velvet cups along with the timeless design of the HD6x0 line sennheiser was able to make the most beautiful headphones of the last decades. These headphones are complete. The sennheiser now offers the 600, 650 and 660, discover your taste and enjoy your music.