An interesting graph. Koss KPH30i, Koss KSC75s and Koss PortaPros, compared.
I can’t find a graph for the Koss UR40 s that Zeos just reviewed, unfortunately.
And here’s a fun one. Sennheiser HD650s compared to Koss KSC75s.
The treble on Koss KSC75s is impressive, I knew it.
(Yes, I copy-pasted this from The cheap AF headphones/earphones thread .)