The above photograph is my Grado GR10. It is from 2014. It's front metal cap is silver and shines. There is a small port between its sheath and the cap. The older version lacks the port. And, like the GR8, its aluminium cap is matte, not shiny. The older version one can be seen below (photo taken by Headfi member CH23, seen in this Head-fi post):

Could be evidence of continual production kaizen, à la manière employed by Sennheiser in the HD series of headphones? And if so, are surreptitious updates a good thing?

As you know, I'm a big fan of the GR10. While the GR10 has many fans, some people are vehemently against it. And, if the changes noted at Head-fi truly return disparate results, it's understandable that opinions vary. I am have tested the old GR10 vs. the new GR10.

And recently, Grado recently released the GR10e, which I think we can assume boasts further improvements. Later, I will be taking a look at the GR10e, and comparing it with the GR10, which many of you know is my favourite universal earphone.

Source: GRADO GR10: Reviews, First Impressions Thread - Page 67
Be sure to check out my review of the 2014 Grado GR10 at Headfonia.