Does anybody else notice a difference in sound signature between the current Koss PRO4AA model and the old vintage model from 1970?

Can anybody tell me the make and model of headphones that this guy is using on air in the news story linked below? Thanks.

Can anybody tell me what the difference is between the Senn HD 202 and the 202 II Thanks!

Does anybody have any recommendations for inexpensive portable amps capable of driving 250 ohm headphones? Thanks!

Does anybody remember what the impedance was of the Beyerdynamic DT 770 PRO when it was first released around 1985?

I have 2 pair of Sony MDR-7506 cans, and one of them has more laid back treble and less bass than the other. Can anyone tell me why?

Can anybody tell me what year the Sony MDR V600 was first released?

Can anyone tell me if the Senn 280 PRO (old model) has a different sound signature than the new model 280 PRO?

Could someone look at the video link below and tell me what headphones the DJ is using? Thanks!

Which is the better studio headphone when it comes to sound quality, Sennheiser 280 or Sony MDR-7506?

From looking at the attached screenshot, does anyone think the headphone the radio personality is wearing is the Sony MDR-V600?

GREQ, Thanks for identifying the headphones in the video. I have been looking at pictures of both the MDR-V600, and the MDR-v900HD and agree that its most likely the V600. Have you had any experience with the 7509HD? If so, is the sound quality better than the 7506?

GREQ, Yes, the other guy in the video is wearing the Sennheiser HD65. However, that isn't the headphone I'm wondering about... I found a better Facebook video https://www.facebook.com/95kqds/videos/10154442437889121/ The guy with the gray zip up sweater. Definitely are Sony cans, but the...

Here is the Facebook video for these mystery headphones. https://www.facebook.com/95kqds/videos/10155574130994121/ It's the first guy when the video begins with the Sony headphones. I'm hoping that someone will be able to identify the model, but it may be hard to tell.