Comparison of Sennheiser HD 600, HD 650, HD 660S headphones
T50P stock vs HD25 pads on adapter | DIY-Audio-Heaven
HD562 vs HD25 | DIY-Audio-Heaven
Sennheiser HD 380 PRO Headphones - Reviews | Headphone Reviews and Discussion - Head-Fi.org
HD25-1 | DIY-Audio-Heaven
Sennheiser HD25-1-II vs AKG K518 review | Headphone Reviews and Discussion - Head-Fi.org
If these frequency response charts are accurate then are the hd 25's (almost-ish) as flat as the dt 990's? And if so then why does everyone say they're bad for producing/mixing, does
Sennheiser HD 200 Pro Studio Headphone Review - Sonarworks Blog
Sennheiser HD 300 Pro Studio Headphone Review - Sonarworks Blog
HD400S | DIY-Audio-Heaven
The Most Excellent Sennheiser Amperior and HD 25-1 II Page 2 | Stereophile.com