Tuneslover
Headphoneus Supremus
Owned HD600/HD650. Really liked those. Understand the better open headphones are gold standard. Problem is increasingly noisy world and many do not reside in relatively quiet environments. Closed headphones are requirement unless listener chooses to listen in scarce moments when outside sound levels are diminished. Have waited years for Sennheiser to manufacture a audiophile closed headset with their resources and scale to keep prices reasonable, but afraid Sennheiser have conceded closed market segment to smaller manufacturers such as Mr.Speakers. Current Sennheiser closed headphones I've listened to have been middle-of-the-road at best. Please Sennheiser consider manufacturing enthusiast closed headphone.
They are the "father" of open back headphones after all.