I needed XLR to 2.5mm so I ended up ordering from Periapt Cable, it was $65.00 (which sucks BTW) but I'm expecting the cable will be well made and trouble free. I also am hoping the P20 & SU-8 combo along with this cable take the HE400i to its potential. At least relative to the associated equipment. Never tried balanced before so hoping it's worth the price of admission. I will say I upgraded the stock PS to the P20 from 12V 1.67A to a 12V 5A I think it seems to sound a bit better!