“With the exception of the metal brackets, the Real Blue NC is mainly made from plastic. However, it doesn't look cheap at all, because its workmanship is of high quality and the headphones feel good overall. They are comfortable to wear. The generous earpieces completely enclose the ears and the Real Blue sits firmly in place without pressing down permanently. This is also due to the thick imitation leather upholstery, which prevents the inside surfaces from rubbing."
"[...] naturally, a beautiful sound is crucial. With Real Blue NC you don't have to worry about that, Teufel did a good job. The new headphones sound even more well-rounded and more balanced than the Mute BT. That starts with the basses. They are Teufel-typically strong, but are not too overbearing. The depths are still clearly audible, even when quiet. At higher volumes they gain pressure, but are not intrusive. The high-tones are clearly defined and remain so even when it gets loud. In addition, the Real Blue delivers clean and neutral mid-tones. Teufel has succeeded in making headphones that can handle classical music and rock as well as electro or hip-hop."
“Active noise reduction works well without affecting the sound. It largely eliminates noise even on the plane or train [...]."
“The touch control on the right-hand loudspeaker is completely new for Teufel. It works just as easily as other headphones. To control the volume, you just have to swipe up or down. If you swipe forwards or backwards, you can skip or go back a song. Tap on the centre to pause, and tap again to resume. If you press and hold the centre, you can start the Google Voice Assistant or Siri."
“Teufel says that the runtime in Bluetooth mode and activated ANC is up to 23 hours. At higher volumes, 18 to 20 hours are realistic, which is pretty good. Without ANC you gain a few more hours. When connected by cable, the running time is roughly doubled, with the headphones sounding equally good in each mode."
“The Teufel Real Blue NC are an impressive overall package. They sound really strong, are versatile and fit comfortably."