Defect or just bad sound?

Small supplement or the question of what am I supposed to headphones so write the assessment is classified as "vote"? That would really interest me .........
My expectations of this headset were relatively high, after I have read quite mixed reviews. The headphones come in neatly packed. They are optically and mechanically well-made, so far there is no criticism. The excellent and comfortable fit I can only confirm. But the sound ............... I like to draw the Beyerdynamik DTX 910 for comparison. The SHP9500 Philips provide little bass. Somewhere around grumbles something, but who has ever heard the Beyerdynamik will be very, very disappointed. Certain pitches in turn come disproportionately across loud while voices come in, for example, excellent recordings of Pink Floyd somehow very quiet and distant expression. Various pieces of music tested, even very high-quality recordings in 192 KHz, 24-bit FLAC sound downright shifted in frequency response, just as if the player is defective. Either the headphones are defective or they sound really bad. An MSRP of nearly 150 can only be a bad joke in the face of these qualities. After all cavort in this area as the headphones Beyerdynamic DT 770 Pro and other variables. With its qualities it can not absorb nearly the Philips. More realistic is then even more the price range to 50, where even a Koss Porta Pro sounds better for 25.