The SE425 is a dual high-resolution micro-sounding unit. The sound-proof headphone uses a double-balanced armature sounding unit to provide an extremely accurate and balanced listening experience. It also integrates a series crossover circuit to ensure high and low frequency clarity and stability. SE425 soundproof headphones sound Very natural, it is the perfect choice for enthusiasts, whether it is on the stage or with you, the sound is very good. 
