Phil007
Sorry, I do not know which material was used in the adapter, it is only 1.5 inches long though.
I just trusted ted.
Quadels
I contacted dhc three times, asking about their adapter, and I did not receive a single reply.
Eventually, another cable manufacturer contacted the owner of dhc on my behalf, and I did receive an email saying “sorry, I have been away” , however I have not received a reply since then.
So, based on the recommendation of a head-fi member (sorry I just cannot find your message to me, but it is on this site somewhere) I contacted ted allen.
I received an immediate reply, everything was sorted out very quickly and I received, what I consider to be, a truly excellent adapter.
Do give him a try, if you own a headphone cable that you really like, it might just work wonders on other headphones.
Finally, I see many reviews of headphones, but I honestly believe that it is not just the headphone that matters,
It is the headphone AND CABLE COMBINATION, that is vital to your ENJOYMENT of the musical performance.