I chose between the 50s and 40s, but there are no differences in sound for me personally, and the price is 2500-3000, and this is all the same money! Yes, about my sound source through the asus xonar dsx is good + through the cortland amp is a complete fly away. Pros below: The sound is powerful, clean, expressive, the lightweight design does not put pressure on the head and sits securely! Has cons: There is no 1.2 m straight wire for mobile devices in the kit!
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