Koolpep
Headphoneus Supremus
I spent about $50 on a DIY balanced cable, using Canare Star microphone cable (stripped out the 4 wires and used paracord sleeve). Soldering was very tricky. On my CEntrance M8, I cannot really see any improvement over the Oppo straight cable I ordered when I purchased the PM-3 direct from Oppo.
That could be because the M8 is not a balanced amp. It has a balanced output but not a balanced amp section. A true balanced DAC and amp might show improvements. I personally love the PM-3 with the LIquid Carbon balanced. It sounds sublime. On our last Meetup a lot of people heard that setup and were very impressed. Specially the ones who remembered the PM-3 as boring where quite surprised how non-boring it sounded Haha.
Edit: usually using the same amp single ended or balanced results in a three to four times higher power output, not so with the M8, I am afraid. Other CEntrance products like the Gloveaudio have a proper balanced amp section (and say so in the specs).
Cheers.