This is my xlr changeover I previously mentioned. The grey pigtail going the amps has dual male xlrs going down to a four pin mini xlr that I use on my headphone cable end. Within ten seconds I can change the cable over to 3.5 mm, 1/4 inch trs, dual 3.5 mm balanced for PONO etc. This is a balanced set up all the way from the dac to the Alpha Prime headphones. In the dual amp configuration I am doubling the voltage, quadrupling the power and doubling the slew rate of the amps. This entire setup cost me right at $1,000 including Alpha Prime headphones, Teac dac, and two Optoma NuForce HA200 amps. On several solid state amps that I own, I am not quite achieving a desired power level; there is no problem now. Cables are all DIY and not figured in the cost of the setup. Neutrik XLRs, cable is all OFC. Also dual volume controls which I inherently like. Also shown is the adhesive lined heatshrink split I was talking about, compress the middle with long nose pliers or hemostats while hot and the heatshrink will maintain the split. Paracord over star quad as well as each channel after the split.