The Audio Factory

NAD C 658 BluOS Network Player/Preamp/DAC

Rating: 4.73 out of 5 (11)
SKU: C658 UPC Code: 786357000091
Add to compare In comparison

NAD C 658 BluOS network player/preamp/DAC

The C 658 has incorporated these fundamental truths to create an entirely NEW type of component that combines a Network Streamer, a state-of-the art DAC, and many aspects of the traditional Preamplifier into a single highly cost effective package. And thanks to NAD’s exclusive Modular Design Construction, it will keep pace with the latest technology, not yet introduced, but inevitably coming in the future. In fact, an optional HDMI 4k switcher module is available now allowing the best sound from any of the many HDMI sources available (like game consoles and video STBs). While the C 658 immediately replaces (or adds) your Streamer, DAC, and Preamp, it also adds many NEW features you may not be aware of, like a Bluetooth aptX HD transmitter to use with your wireless headphones. The highly flexible outputs allow for a true balanced connection to powered speakers or amplifiers. Single-ended connections for amplifiers and subwoofers are also provided and include an adjustable subwoofer crossover executed perfectly in the digital domain. A highly sophisticated MM Phono input is also included along with line inputs for legacy analog components.

Also on board is BluOS, the most sophisticated High Res streaming system available. BluOS natively supports over 15 streaming music services and indexing of over 250,000 tracks from local network sources. The C 658 becomes a node in the BluOS ecosystem allowing high res network streaming to 64 zones and control options for iOS, Android, Windows, and Mac OS phones, tablets, and desk top devices. BluOS also supports all major smart home controllers and is available in a wide range of products making it easy to create a whole house audio system with the C 658 at its heart.

The C 658 is part of our Classic Series of components which have an enviable reputation for giving Music Lovers more enjoyment for less money. If you want a solid block of hand–crafted aluminum with gold plated accents you’ll need to look elsewhere. If you want state-of-the-art performance and features in a sturdy no-nonsense package then you have the right address.

Most NAD components have been High Res for 45 years with very wide bandwidth, low distortion, and ultra-low noise. We just never had High Res source material to play. With High Res digital recording and streaming, combined with advanced technology like MQA, record companies are opening their vaults and releasing Studio Master Quality recordings. MQA decoding is available through BluOS Streaming content. The C 658 is pure High Res from input to output and features the ESS Sabre 32bit DAC , one of the best performing DACs on the market today with its 118dB Dynamic Range and incredibly low jitter spec. All preamp functions are executed in the digital domain including the same wide range non-truncating digital volume control used in our Masters Series components. This offers an incredibly short analog signal path that, rather uniquely, is identical for all volume settings. Sophisticated active power supplies provide super clean voltages to all circuits to keep noise and distortion at the edge of measurability.

The C 658 is also the first NAD stereo component to feature Dirac Live room correction*, the most sophisticated and effective room correction available. Dirac corrects the impulse response of your speakers, in addition to the frequency response of your room, for a truly transparent window into the musical performance. When the room resonances are tamed and the transient response is corrected, the result is magical. You have never heard your speakers sound this invisible or this good!

*Note: The C 658 includes a license for Dirac Live with the option for advanced users to upgrade to a Dirac Live Full Frequency version.

Master Quality Authenticated (MQA) is a revolutionary end-to-end technology built into every BluOS Enabled amplifier to capture and deliver MQA music to your speakers in the purest quality. All BluOS Enabled players and systems include a powerful decoder and audio renderer for the millions of the MQA encoded songs, The MQA logo shown in the BluOS app indicates that the unit is decoding and playing an MQA stream or file, and lets you know that you are hearing exactly what the artist recorded and approved in the studio.

Customer Reviews

Based on 11 reviews
Qi Tang
perfect service

It gives people a very intuitive understanding of their order status and logistics status. Although I haven't opened the box yet, I think this is a very good deal. And as an official authorized dealer of NAD, I have no worries about the quality of the goods. I will come again.


I have had no issues, this thing is great. Dirac sounds fantastic (with minor tweaking) + Bluos is great for Amazon Musing, and the fixed volume with analog bypass on Line 1 is perfect for my HT. It's just what I needed.

Great service also. The Dirac mic was missing and they shipped out a new one. I received it within a few days.

5 stars all around!

Shaun Serediak
not quite

the app has the odd glitch/fail here and there requiring full shutdown and restart of the unit and bluos. would nice to be able to have deezer connect, there are features within deezer/tidal/etc that are not accessible through bluos.

Valeri Kotliarov
Bass management problem

I don’t think I am the first one to report this bass management related problem. The Sub output signal is weak below -30 db when main speakers are playing loud and as a result the subwoofer doesn’t switch from standby to active mode. I was planning to use this unit as a preamp but ended up using it as a player/dac only because I had connect subwoofer to the amplifier pre-out.

Big Grammer
Nad 658, early review

Nifty piece of gear. Easy set up. Can’t beat the price right now. Couldn’t use the Dirac right away because I can be a bit of an idiot sometimes. A quick back and forth between support and myself rectified that in short order. I am now a Dirac god; fun bit of stuff. (Hint: the mic plugs into the back of the 658 unit via a usb dongle included) Paired easily with an existing Node for multi room, lag free.. blah blah. Sound itself is very transparent; exactly what you would expect from NAD. Support (Tyler) was very non-judgmental. Can’t wait to make another purchase here.