HD 600

Open backs are basically always going to roll off, modern planars just sometimes postpone it a bit longer, and more importantly slope downwards a bit more gently. They're generally just slightly easier to EQ to conformity with harman-style targets down to ~20hz. For example you could compare the ext

I promise, they totally used it to refer to the HD-600 back then too. Now that was in contest with Grado, Sony, Beyer Dynamic, and AKG principally, so draw your conclusions accordingly... Sennheiser was maybe the least bright of the bright diffuse field tunings of the era, and of course not even in