There are as low ... not strong cord, headphone itself which begins to age ... It is sold overpriced (should not exceed 99 EUR), I had the same price for a used HD650 for sure I do not carry as Bose Supra, but it's level sound reproduction day and night. My Walkman I wonder if Koss PORTAPRO not enough because its price has fallen sharply in recent years. (Vs. 180EUR 40EUR for Bose)