piglet
100+ Head-Fier
Grado sell that 4 metre cable but I think an extension of about 1 metre would be very useful to many people. The original cable with my SR325x cans is excellent for plugging them into my Meridian Prime DAC/amp which sits on my desk however quite often I have things set up so that I'm a bit further away from the DAC/amp and I think a lot of people are like that. If your DAC/amp is in a rack system for example and you sit beside it, as I see many Head-Fiers do, then you'd want a cable that is about 1 metre longer than the stock.You can get the original grado extension cable which is about 4 meters, or you could get a generic one.
Actually I had a cursory look for an extension of about this length here in the UK in fact they have them at Amazon, quite a choice, but all with mini jack-plugs and all very cheap. I'm thinking I'd want something a bit better quality, so for that I think I'd have to get it made up. Years ago I would have soldered it myself actually but nowadays I have other things I'd rather do.