Pros: Details! It sounds 10X better than Schiit's Bifrost Uber, Neutral, but not boring, powerful, drives the LCD-2 to heaven!
Cons: Plastic Casing. Headphone(s) need to be terminated to balanced. Difference is sound between single ended and Balanced
Well not much to say here. Audio-GD kicks as(s). Seriously this amp/dac combo has details, neutral, but not boring, powerful, has a remote control, preamp functions, low and high gain, balanced output, etc, all at $580 promo price. I cannot recommend more. It sounds better than the Schiit Bifrost, and the amp in this NFB-10ES2 is better in every way than the M^3 with ADA4627 opamps. For rock music, reggae, and jazz this thing wins. Seriously I don't care if this is made in China or US, it sounds amazing. I compare this to the Beta22, my uncle had a beta22 2 channel, and it was so similar sounding.
Honestly this unit should be priced at $750 maybe even $1000. Hell I'd pay $1000 for it. NFB-10ES2 is that good.
The only downside is the casing is plastic, and the amp outputs more power and sounds better out of the balanced output. I went with a Charleston Cable Company LCD-2 4 pin XLR cable, but you could DIY a cable easily as well. This amp should be on anybody's list. This unit sounds good with basically everything since its neutral. I love the Sabre ES9018, and this is coming from a warm and musical music loving freak. If you want a warmer amp, then NFB-10.33 should go on your list as well, it costs the same, is balanced, but uses 2X WM8741 (warmer sounding chips).
For Rock (J-Rock too), Daft Punk, Jazz etc this amp is perfect. Buy it without hesitation if you have the funds for it. I don't think I need a Beta22 anymore.
I highly recommend Audio-GD's NGB-10ES2. Loving it with my LCD-2 Rev 1.