Tried this within the Topping D50s DAC instead of the LM49720NA and it sounded like, well, unplugged :-). Seriously. Vocals forward, everything else a mile behind. Weird. But vocals sounded like a million bucks. Honestly, in 20 years I've never heard better vocals from my speakers. So I put it into my FX-Audio Tube-03 preamp on the output stage connected between the Topping D70 DAC and Fase Performance amp and that combination sounds incredibly good. Brilliant opamp.