I call the BTR 5 my, "magical music maker." I am astounded at how this little DAC/Amp can drive my HiFi Man HE-5 using the single ended output. Those cans are power hungry. They drive those cans really well. I just ordered a Neutrik to 2.5 mm cable to be able to take advantage of the balanced output. Did you also download Fiio's phone app? It has a 10 band equalizer that I like to use with older recordings.