KPH30i versus current
PortaPro.
Very similar on the test fixture and very likely the same drivers.
In practice, however, the KPH30i has bigger and differently shaped ear pads and rests on the ears. This may be creating a better seal/coupling to you.
The PortaPro rests on the temples (just above the ears) and less so on the ears. That's why there is this little adjuster on it.
It may be more comfy for people wearing glasses, but can also create a less good coupling changing the sound.
So they can sound different and comfort is different. In fact I had to remove the little metal 'hook' because it kept poking in the top of my pinna.
Instead I prefer the KSC35 and KSC75 (the KSC55 was too heavy in weight).
I also did not like the KSC35 has a terrible ear-clip.
Fortunately the KSC7X came along and its clips were similar to the 'easy to bend in perfect shape' KSC75 clips but in all black so moved these to KSC35.
The newer KSC75, however, is not the same as the earlier one despite Koss insuring me there were no changes. I hear and measure differences between them.
These Koss thingies have nice (smooth) midrange, distort easily in the lows, certainly at higher than 'active' listening levels, lack subbass.
They are easily for the brain to 'adjust' to and only disappoint when directly comparing them to 'better' headphones.
I really enjoy the KSC35/75.
