Although it is one of the "four major headphone brands", Beyerdynamic's performance in advanced stereo headphones is average. Whether it is attention, sales, or recommendation on major well-known websites, Beyerdynamic is inferior to brands with higher rankings. In CNET's "2016 Best HiFi Headset of the Year", Beyerdynamic T90 was on the list, which uses Beyerdynamic Tesla unit technology, which gives it an advantage in terms of resolution and detail performance. In terms of sound quality, CNET even called it "comparable to a $1,000 headset". However, the T90 has an impedance of up to 250Ω, which is not suitable for mobile phones, tablets, and computers, and it is more suitable for audiophiles who have a complete audio system. In addition, you can choose the T51i, which is easier to drive, has a good performance in various indicators, and the price is about 1900 yuan.