"The Ollo Audio s4 has become a reference for me. There are many strengths: very controlled and present low end, focused on mid-range and last but not least, superlative stereo image. You can always trust what you hear!"
OLLO vs. Sennheiser vs. Audeze vs. AKG vs. Beyerdynamics vs. Audio Technica
We measured and compare the frequency responses of the main mixing headphones on the market. Measurements were made using G.R.A.S 45CC using IEC 60318-1 ear simulator and Dewesoft AD conversion Sirius system.