The Good The full-size Beyerdynamic T90 uses advanced Tesla magnetic flux technology to produce remarkably accurate sound and its open-back design creates more spacious stereo imaging. The T90 is also very comfortable to wear for long periods and measures up well against headphones that cost $1,000.
The Bad It's expensive and definitely not suited to on-the-go use; the open-back design will leak sound.
The Bottom Line Sure, the Beyerdynamic T90 is pricey, but no other less-expensive headphone can match the T90's combination of comfort, sound, and build quality.
Pricey headphone with remarkably accurate sound
Beyerdynamic offers a broad line of headphones, but it's the company's midprice and higher-end headphones that are sought after by audiophiles and record industry pros. Needless to say, some of these models, including the flagship $1,399 Tesla T1, will set you back some serious dough.
Introduced in 2010, the T1 has a closed-back design and features the world's most powerful headphone magnets. Those ubermagnets dramatically improve efficiency and lower distortion. Every subsequent Tesla model has had a closed-back design until the T90 reviewed here was released in June of 2012. It's the first open-back Tesla model.
That's a significant change, because an open-back design allows the user to more easily hear outside sounds and also produces more spacious stereo imaging than closed-back headphones. The end result is impressive. The T90 delivers extraordinary resolution of fine detail, and since it's unusually comfortable, it's a pleasure to wear for hours at a time.
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