No, I own AH-D750 PQ 30 Ohm low impedance headphones, the build quality is there from www.denon.com

They are really comfortable for hours, headwize member recommended. I hope this helps.

P.S. I have a $51,000+ home theater set up which includes 771 Discs R1, 1 R2, and 1 R4 @$25=$19,325. 600 CDs @$20 =$12,000 total for just discs $31,325 plus shipping for pieces of plastic!