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The NAD C 658 is a new kind of stereo component, one that at once changes preconceptions and opens new possibilities for audio reproduction. You see, there has never before been a component offering such a rich palette of both new and proven technology.

NAD C 658 BluOS Streaming DAC

Redefining the Architecture of Hi-Fi Playback

As we move deeper into the 21st Century the way music is distributed and enjoyed continues to evolve away from physical media to streaming. It also has moved away from analog to digital. 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.

Make the Speakers Disappear (It’s Not Magic)

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!

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.

Pro-Ject Black Portable Hi-Res Digital to Analogue Converter

DAC Box E Mobile is Pro-Ject‘s first endeavour into the portable audio market. It is a compact digital to analogue converter that elevates the sound performance of your modern portable audio devices. While designed to be used on the go, DAC Box E mobile can also be connected to a Personal Computer or Laptop via the USB C input. It supports high resolution file formats, up to 32bit/192kHz, and connects to any common headphones via the 3.5mm headphone output, with sufficient power to listen comfortably even in louder environments. DAC Box E mobile receives power directly from the device it is attached to, so there are no additional battery packs to worry about.

Pro-Ject Silver Portable Hi-Res Digital to Analogue Converter

Pro-Ject Black High End Digital to Analogue Converter

The DAC Box RS2 is based on our incredibly successful Pre Box RS2 Digital but takes away the analogue pre-amp section, to reduce the unit to a standalone DAC with fixed output. It uses the same excellent sounding DAC chips that were first used in it‘s little brother, the Pre Box S2 Digital. Based on the same core-design principles, the feature set is extended and driven to new heights. The result is a fantastic sounding and very versitile box. The perfect partner for anyone looking for a modern DAC with a plethora of digital inputs and a fully balanced circuit board design.

Pro-Ject Silver High End Digital to Analogue Converter

DAC Box E Mobile is Pro-Ject‘s first endeavour into the portable audio market. It is a compact digital to analogue converter that elevates the sound performance of your modern portable audio devices. While designed to be used on the go, DAC Box E mobile c

It is a widely recognized fact that most mobile devices don‘t come with a hi-fi quality DAC chip or sound output. With DAC Box E Mobile, you can keep all the convenience and features of your existing smart device, except now you can enjoy all the power and musicality of each track. Whether you’re listening to saved audio files or playing from a streaming service, your whole portable listening experience will improve dramatically with the addition of DAC Box E Mobile. DAC Box E mobile – the modern audiophile’s companion and the road warrior‘s savior.

High resolution support up to 32bit/192kHz

The DAC Box RS2 is based on our incredibly successful Pre Box RS2 Digital but takes away the analogue pre-amp section, to reduce the unit to a standalone DAC with fixed output. It uses the same excellent sounding DAC chips that were first used in it‘s lit

The DAC Box RS2 is a DAC that uses a dual-mono configuration of the highest-class D/A converters from ESS Sabre. ESS9038Q2M chips provide the highest sound quality in price-affordable, high-end circuits. Unlike most of DAC´s in this price range, the DAC Box RS2 includes dual DACs and separate signal paths for the left and right channels.

Also thanks to these converters, the DAC Box RS2 supports up to 32-bit / 768 kHz files in PCM and DSD formats (up to DSD512) via USB, covering any digital file you can buy or stream. The fixed analog output can be switched between solid state and high-quality tube. Thus, the customer can choose which of the option is preferred.

The DAC Box RS2 has eight digital filters. One of them is the proprietary optimal transient digital filter from the MQA creators. With these filters, the listener can customize the sound to suit their own preferences. It comes with full HW and SW support for MQA technology (Master Quality Authenticated).

The USB input signal is processed by a powerful multi-core XMOS microcontroller with advanced Multi-Core RISC architecture. The CPLD MAX II (Complex Programmable Logic Device) Altera is used for re-clocking, which together with the XMOS microcontroller brings high-quality processing of both classical and MQA technology. For the ideal use of this technology, it is best to connect the DAC Box to our Stream Box S2 Ultra in conjunction with the TIDAL service. You can also enjoy MQA quality by linking it with our new revolutionary CD transport, the CD Box RS2 T. The CD Box RS2 T can be connected to the DAC Box RS2 by reliable I²S differential bus via the HDMI connector where the Pre Box RS2 Digital also provides the master clock (16.9344 MHz).

A premium full aluminum remote control is included in the packaging and the DAC Box RS2 is available in a high-quality silver or black aluminum case. The big display screen on the front shows all relevant information in an easy to read, clean and structured way. Navigating the menu is very responsive and fast, allowing you to set up the unit to your preferences in seconds!

High Quality optionally selectable upsampling of PCM and/or MQA content with propriatory filtering

Advanced re-clocking powered by new XMOS chip with Mulit-Core RISC architecture

6 digital inputs: asynchronous USB, i²S HDMI, AES/EBU, Toslink, S/PDIF coax

Output stage switchable between 6922 tube & solid state

New high-quality display with responsive and fast UI design

High quality full Aluminum remote control included

Digital-to-Analog Converters

NAD C 658 BluOS Streaming DAC

Pro-Ject Black High End Digital to Analogue Converter

Pro-Ject Black Portable Hi-Res Digital to Analogue Converter

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