Ok, so a year ago, I purchased the Sennheiser HD 448 online from sebago traders for around $70, which was cheaper than the $99 that amazon was selling it for. I've used that pair since last August to just this month without issue. However, I always felt that they had cheap build quality and the noise reduction wasn't as good as I though it would be, though I didn't do anything because I thought that thats how the headphones were supposed to be (i never tried them in a store or anything). Recently, they broke, the sound became muffled and I sent it back to Sennheiser under warranty. Instead of a repaired product, today I received a factory refurbished HD 448. The first difference I noticed was the feel of the headphones. They felt sturdier than my old Sennheisers ever did and the noise reduction was WAY better. I also noticed a few subtle differences with the actual build, the metal band that goes across the earcups is lined and is not perfectly clear like the old ones. The ear cushions also feel very different and are more comfortable now. Another thing I noticed is with these, there is a circular pad to prevent the earcups from touching the headphone when moving the earcups back and forth.
So were my old Sennheiser HD 448s fake? I really can't tell and for some strange reason want to know if they were. After all, I've listened to them avidly and had used them for nearly a year. Or could it be like a new, updated model?