Do individually calibrated headphones from Sonarworks make a difference? Yea!
- Stereo imaging is clearer
- Vocals are not over-pronounced
- Bass (especially in <= 200Hz range) is clearer/louder
Is it worth the $149? IMO yes, especially because of how it cleans up the sound. (It is worth noting that not all headphones normalize with EQ calibration well, but the HD 650s do.)
Below is a comparison of the average calibration curve to the individually tailored one.
The corrections in the 10kHz range are particularly interesting!
Individually Calibrated L/R
Individually Calibrated L Only
Individually Calibrated R Only