Average| Source | Info |
|---|---|
| Audio Review | Audio Review: http://www.audioreview.com/reviews/Headphone/product_5762.shtml |
| Audio Video | Audio Video : http://www.audioimports.com/rev_oct_96_1.htm |
| Stereo Times | Stereo Times : http://www.stereotimes.com/acc120999.shtm |
| Audio Revolution | Audio Revolution : http://www.audiorevolution.com/equip/sennheiserphones/index.html |
| Stereo Times | https://stereotimes.com/acc120999.shtml |
| Secrets of HT & HiFi | https://www.hometheaterhifi.com/volume_4_1/sonygrado.html |