Does the six wires go all the way down to the jack? What do you connect the third (black) wire to on a 4-pin XLR? To the Sleeve of the XLR connector?
The black wire is physical ground. In a 3 pin XLR goes to pin 1 but in a 4 pin single connector you don't have the ground pin since you are using 2 pins for the positive (one per channel) and 2 for the nevative (one per channel) so most likely you will connect the ground to the sleeve to make the ground.
The extra soldered joints and the connectors. I don't know it will be audible but it can increease resistance. When I hardwire my HE-6 they acutally improved in sound and gain about 1 db in sound.
He did. I can't quote the technical reasons but the way I interpreted it, the T1 has an uncanny resolving ability and inserting that additional connector would be noticeable. For the other headphones, it would not be as noticeable but it would be there though. I took his advice on the T1 since I had already had Robert hardwired a Zeus cable but for the others, I decide the ability to only buy 1 cable was worth the lost sonics. My listening position is roughly 12 feet away so quality cables were getting expensive to say the least.
You will like much more the T1 with the Zeus. After I bought them i was about to give up on them and Robert convinced me to let him recable them with the Zeus. The picture of the T1 in the Robert's website are actually mine. After the recable job they got more refined, clean and the harshness of the top end was gone. IMO well worth the money.