Summary: Spectacular clarity. Clean, explosive dynamics. No need for a pre-amp. These are wired into two big Bryston 7BST mono blocks (balanced) and there is ZERO noise. I can pause a music track, turn the M51 up all the way, put my ear to the speaker and hear-- nothing. This level of silence creates a noise floor where every nuance is discernible. I have owned many high-end audiophile grade products, and I'm surprised this doesn't cost over $10k.
Summary: It's early but this piece sounds terrific and offers excellent connectivity and functionality for my 2.1 system. I wish the remote was a little more user friendly and a volume switch would be nice but you can't have everything.
Summary: Almost can't believe the difference this unit has brought to all of my digital audio, CD's, internet radio, computer, any digital source all into another realm of sonic bliss. Pandora radio has such a huge sound stage now. Worth every penny at this price. Sounds nearly like vinyl on an expensive turn table.
Pros: Instant improvement to any digital source. A real bargain for the price.
Summary: This DAC replaced the Oppo BDP 105 in my computer based stereo system. The improvement over the high quality 2 channel DAC in the Oppo was immediately apparent. Most generally, it had a liveliness to it that I was missing in the Oppo. Sound was also fuller. Just more engaging with a variety of music from a variety of sources. Noteworthy for me was how much better streaming services like Spotify Premium and MOG sounded. That's special.
Pros: One of the best DACs on the market at this price with a proven track record of very satisfied users. Display has great visibility. Remote works great for me, and you don't need to use it often except to adjust volume ( there is also an option to lock the volume and adjust it through another component).
Cons: none really. One can always want different features, but this gets the essentials right.
Summary: Great Sounding DAC. All the reviews about the sound are right on. Really great, and works well with Sonos and streamed content, although the best sound came from streaming from my MAC through USB (with the automatically upsampling codec apparently employed by NAD but documented nowhere). I love it and will likely be keeping it, but I do have some nits to pick that I interpret as lack of thoughtful consideration for users,.
Pros: Sound is Beautiful! (although I am suspicious that, with all of the upsampling and undocumented magic going on within the unit, how software upsampling via USB, of CD quality output sounds so different from direct, unmolested CD quality digital coax that is only using the DAC. I wouldn't think that pre-upsampling would improve the sound from a DAC that does so much internally, but it clearly does. Which makes me wonder.... HDMI video passthrough is GENIUS! Hello Jools...
Cons: No display off. Remote. Documentation. No Volume control on unti, only from remote. plug and play, no options (I like to play a little, read, and understand ). Only one digital Coax input.
Summary: The reviews from the various sources are spot on about this unit as far as the sound is concerned. The Benchmark DAC HDR was my first outboard DAC and I really enjoyed it but went to the NAD out of curiosity and because I did like the fact that it can act as a receiver of sorts i.e. wife can handle it better and it accepts HDMI with video pass-through, and because her and I watch more streaming tv on the 2.0 system I have than HT setup i.e.
Pros: Excellent sound, great for up-scaling media, great functionality.
Summary: Like many others, I've been transitioning over to streaming music - has been a hard sell for me, though, because of quality vs. convenience factors. (My main system is NAD T787 AVR, Marantz NA7004 NW Player, NAD C565 CD, Oppo 93 BR, PSB Synchrony Speakers, 5.2 setup). I've been running Airplay in 3 rooms + patio for a few years, basically as background music, using Apple Lossless files.
Pros: Sound Quality is amazing. Clarity, separation, soundstage, tight bass. My Synchrony towers seem like they're each about 4 feet wide, a true "wall of sound"! And my PSB 300 subs have NEVER sounded so musical.
Cons: Not really a con, but note that the M51 takes a LONG time to break in fully, took me several weeks of nearly constant play before harsh highs and boomy bass went away. Biggest gripe: I would have liked a couple more Coax & Optical inputs, had to reroute a few components thru the Marantz NW player instead of direct to the DAC. Eventually this will sort itself out, when mostly using streaming, but annoying for those in transition.
Summary: This is a great sounding dac and for the money it should be. I got this dac to decode 24/192 stereo audio tracks found on some Blu-Ray discs and some DVD-A discs. There are also some 24/192 downloadable music files out there that can be sent to this dac via a computer or player like the Oppo 95. Make no mistake, this is a stereo dac. There really aren't any 5.1 or 7.1 stand alone dacs out there that I am aware of.
Summary: Outstanding DAC. It manages the holy grail in DACs---incredible detail with musicality and no digital glare/harshness. I auditioned 6 dacs before choosing this one. Base is tight, clean, nuanced and with a power and depth that is amazing. Imaging is excellent and wide. Instruments and voices seem to come alive and make you feel like the musicians are playing in your room.
Pros: outstanding bass, excellent imaging, instruments and voices seem to come alive.
Cons: perhaps price-- but they don't have competition at this performance level for this price