HIgh End Sony Maybe even thier Professional Series - Look at MDR Z7M2

Specially designed drivers

How else do these headphones produce sound so accurately and powerfully? For one, the dynamic drivers are huge — 70mm to be exact. And new to this second-generation model: strong, aluminum-coated diaphragms that can move fluidly.

Sony also included a supersized neodymium magnet that doubles the circumference of the magnet used in the original MDR-Z27. That means the large, ultralight diaphragms start and stop quickly to reproduce mids and vocals with even greater precision and detail.

Rather than use a traditional grille, Sony opted for a Fibonacci pattern that helps keep air flowing in a specific way that lowers resonance.

It also helps produce smoother highs without harsh peaks.

Large vents on the bottom of both ear cups help accentuate the bass.

To be honest for the price of some of the best headphones I’ve ever heard I would be hard-pressed to choose the venerable HD 600 over them.

and just as a general guidance, these aren’t like talking about Sony XM fives or something this is like they’re very high-end, audiophile grade level headphone line