Sennheiser and Beyer are from Germany, while AKG is from Austria. They have a European style, with clear sound analysis and less coloration. AKG has better mid-range and lower frequencies, but some of its headphones sound muffled. Sennheiser is the most well-known and suits people’s listening tastes. Beyer focuses on high-fidelity reproduction. In my opinion, Beyer has the best sound quality. Suitable for classical music, symphony, light music, in fact, pop music is also good) It may not be enough for American headphones for rock.

Audio-Technica is Japanese, the same as Sony. The Japanese style is obvious. It's more colorful and may not have particularly heavy bass. Suitable for average pop.

The above are all professional headphone brands, while Monster has more of a trendy meaning, but its sound quality is not as good as the above brands. American style, heavy bass, heavy tone, suitable for rock, rap and explosive music. Such as Monster, and soul by ludacris. They are trendy headphones.

The world's four leading headphone manufacturers: Beyer (Germany), Sennheiser (Germany), AKG (Austria), Goethe (USA)