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Rotel® Stereo Digital-to-Analog Converter with front panel USB for Apple iOS devices and balanced XLR outputs

Rotel® Stereo Digital-to-Analog Converter

Rotel’s new digital-to-analog converter envelops the listener in the most accurate audio reproduction possible from any digital source, whether it be legacy PCM sources or the latest digital file formats. The RDD-1580 provides a level of performance unheard of at its price level and is specifically designed to cater for the growing popularity of high definition digital audio.

At its heart, the RDD-1580 makes use of Wolfson’s extraordinary WM8740 stereo digital-to-analog converter. But where competitive products use only one of these converters to handle two channels, the RDD-1580 uses two WM8740s in a complementary configuration, which reduces noise and distortion well beyond that a single converter can provide.

Another RDD-1580 advantage lies in its input flexibility. A front panel USB input supports Apple iPod®, iPhone® and iPad® as well as streaming via Bluetooth with the included adapter. The rear panel PC-USB input supports audio up to 24-bit/192kHz in asynchronous mode. Two sets of rear panel RCA-style coaxial and optical digital inputs are optimized for LPCM data streams. This includes CDs 16-bit/44.1kHz standard up to high definition sources with 24-bit/192kHz audio data.

A Rotel-designed and manufactured toroidal transformer sits at the foundation of the RDD-1580’s well-regulated power supply. Advanced custom-designed slit-foil capacitors provide electrical storage capabilities to ensure substantial and stable operating voltages and current to feed the critical circuit stages.

The carefully tuned analog section is another example of Rotel’s award-winning Balanced Design approach where specifications alone do not dictate which electronic parts are selected. Rather, extensive listening tests are carried out under controlled conditions to determine the best way forward. During this time the entire circuit is carefully tuned to provide sonically accurate signal reproduction.

The RDD-1580 provides both single-ended and balanced outputs with RCA and XLR connectors respectively. Recognizing today’s changing tastes in audio sources, the RDD-1580 even provides high-current charging capability (2.1 amperes) for an iPad® or similar device to reduce clutter and increase needed desk space while expanding your audio source options.

Built for stunning sound quality, but designed for today’s ever-increasing digital world, the RDD-1580 offers a first-rate combination of superior sonic and convenience.

Total Harmonic Distortion (THD)(20Hz–20kHz) <0.004%

Dual Wolfson premium 24-bit/192kHz Digital to Analog Converters

MP3, WAV, WMA, Ogg Vorbis(up to 48kHz 16-bit)

Coaxial Digital Audio Inputs:

Optical Digital(Fiber Optic) Audio Inputs:

Total Harmonic Distortion:

Signal to Noise Ratio:

Rotel® 8 Channel Black Digital to Analog Converter

The Rotel DT-6000 DAC Transport celebrates 60-Years of performance synonymous with the brands Japanese heritage. PC-USB, Optical, Coaxial, and included tray loading CD Player provide the ultimate flexibility for your favorite sources rendering the audio with unprecedented detail and immersive sound stage.

Rotel® 8 Channel Silver Digital to Analog Converter

The Rotel DT-6000 DAC Transport celebrates 60-Years of performance synonymous with the brands Japanese heritage. PC-USB, Optical, Coaxial, and included tray loading CD Player provide the ultimate flexibility for your favorite sources rendering the audio w

ESS premium 32-bit 8-Channel Digital to Analog Converter

Dedicated power supplies feed all critical circuits driven by an in-house manufactured low-emission shielded toroidal transformer with high efficiency, low ESR slit-foil smoothing capacitors delivering ripple free current. Physical circuit board isolation techniques and electronic decoupling design methods result in lower residual noise and reduced distortion in the sensitive analog stages including the external DAC output filter.

The Coaxial and Optical inputs support PCM audio up to 24-bit/192kHz with the asynchronous PC-USB input rendering up to 32-bit/384kHz high resolution music files. The PC-USB also supports MQA and DSD 4X and is certified Roon Tested for the highest compatibility with Roon software.

The smooth action tray loading CD player utilizes Rotel’s formidable 30-years of experience engineering and manufacturing award winning disc spinners. The industrial design includes a spring-floating CD mechanism with damping materials to reduce mechanical noise and vibrations during playback. Precision motor controls and the optical laser pick-up extract every nuance and detail from CD collections both large and small.

Front panel controls and a back-lit IR remote provide intuitive operation of the unit with playback status, music file stream details and CD Metadata shown on the 2-line display. The RS232, 12V trigger and external remote input ensure simplified integration with all popular control systems. The DT-6000 is available in both black and silver colors.

The DacMagic 100 works by taking a direct digital audio signal from your device to bypass its soundcard or DAC. It then digitally processes the audio signal using our custom designed technology, dramatically improving sound quality and reducing distortion

Cambridge Audio Digital To Analogue Converter

Uses a direct digital audio signal from your device to bypass its soundcard or DAC

Digitally processes the audio signal using our custom designed technology

Dramatically improves sound quality and reduces distortion

Thanks to a Wolfson 24-bit DAC, a 24-bit/96kHz driverless USB Audio 1.0 input and S/PDIF and TosLink digital inputs, the DacMagic 100 takes the sound from your computer, iPod, TV and other digital devices and adds detail, depth and added clarity to give you a true audio experience.

Generally, the digital to analogue converter found in typical digital devices is poor and won’t extract the truest quality of audio from your sources. The DacMagic 100 works by taking a direct digital audio signal from your device to bypass its soundcard or DAC. It then digitally processes the audio signal using our custom designed technology, dramatically improving sound quality and reducing distortion. This results in greater detail, sparkling clarity and a deeper scale to all your audio.

DacMagic 100 is very flexible and supports virtually all digital file formats including the very highest quality 24-bit studio master or lossless quality audio files stored on your computer. With three different digital connectivity options and the ability to connect four devices concurrently, DacMagic 100 is a true digital music enhancement hub. Set-up is totally intuitive, allowing you to begin enjoying better quality audio in minutes.

Like all our products, the DacMagic 100 was custom developed from the ground-up by our design team at our headquarters in the heart of London. Our engineering teams put an incredible amount of attention to detail on ensuring the sound quality is the focus of the product, for the DacMagic 100 this included incorporating the very latest digital to analogue converter from market-leader Wolfson.

The DacMagic 100 works by taking a direct digital audio signal from your device to bypass its soundcard or DAC. It then digitally processes the audio signal using our custom designed technology, dramatically improving sound quality and reducing distortion.

USB Port:

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.

PrimaLuna® EVO 100 Black DAC

By incorporating a low-noise mini-triode vacuum tube into the digital clock, this boldly conceived design provides vastly superior resolution, detail retrieval, improved clarity, increased definition and detail from top to bottom. 

PrimaLuna® EVO 100 Silver DAC

Introducing the world's first tube-based data clocking device: the SuperTubeClock™

By incorporating a low-noise mini-triode vacuum tube into the digital clock, this boldly conceived design provides vastly superior resolution, detail retrieval, improved clarity, increased definition and detail from top to bottom.

AC Offset Killer is about goose bumps. The ones you get when music comes out of a background so quiet, you may say to yourself “Just how is this possible?” PrimaLuna custom-winds our own massive toroidal power transformers that are low in hum and EMI. But we wanted more. Our engineers designed the AC Offset Killer to lower transformer noise to a place no other manufacturer dreams of going, regardless of how bad your electricity is. The result? Sense of space. Texture. The resonance of an acoustic guitar or violin string that seems to trail on forever. The AC Offset Killer will amaze you.

Premium parts including polypropylene coupling caps, triple pi power supply filters, custom designed isolation transformers which separate the analog and digital devices, resulting in decreased signal degradation and improved sonics from top to bottom. Many DACs weigh in at ten pounds or less. The EVO 100 Tube DAC weighs nearly 29 pounds!

You spend a lot of money on interconnects. So why have the signal go right from the RCA jacks or speaker terminals into circuit boards with copper traces so thin you can hardly see them? What’s high-end about that?

PrimaLuna employs Point to Point Wiring on all products. The entire signal path, including resistors and capacitors, is painstakingly hand wired with heavy-gauge cable by craftsman.

Per channel dedicated tubes. While it is fine to use a single tube as a buffer for both channels and claim your DAC is "tube", it can't be compared to the PrimaLuna design and what it does for the music.

USB digital input allows using your computer for storage and playback of your music with all the benefits of features like playlists and easier access to your whole music library. Rather than just add in an USB input as an afterthought, PrimaLuna engineers searched endlessly looking for the best-sounding USB interface we could find. Our USB input converts the jitter-filled USB digital signal to S/PDIF, dramatically improving the digital signal quality before it gets to the SuperTubeClock. This USB input is a true high-resolution digital input.

This is where the magic happens... the SuperTubeClock™ replaces the solid state oscillator normally found in a DAC with a mini triode vacuum tube. By using a tube, we have significantly lowered the amount of jitter and noise, resulting in superior detail retrieval. This in turn yields superior detail and dynamics from top to bottom, and improved overall musicality.

Vacuum tube rectified power supply incorporates eleven separate power supply regulation circuits. Tube rectification is synonymous with organic sound, especially when compared to DACs being known as sounding like "a computer".

First a note on the tube itself: The tube is a very rugged, long-life Russian military Triode specifically designed for oscillation purposes... which is its function here. It is running very conservatively so life expectancy is roughly 5 to 10 years of operating time. The small glass envelope guarantees very low microphonics.

Triode tubes are inherently low noise devices, and extremely linear when used properly. This means that the oscillation frequency wave it produces is very pure and clean. The noise in the sidebands, from 10Hz to 100kHz on either side of the oscillation frequency, is extremely low. This is the important spectrum for audio. Everything below and beyond that can be ignored.

When you reclock the inputs, any noise that is generated here appears unfiltered and unattenuated at the input of the conversion chip, and injects jitter, which from then on is an indistinguishable part of the digital audio stream. No amount of cleaning will ever be able to remove this noise once it reaches this point; it has become part of the audio signal. This noise "rides" on the audio signal, so you do not hear it as noise, but as smearing of notes and masking of detail. There is a distinctive loss of dynamics, tonal purity, inter-transient silence, and sense of timing. We call this "noise modulation."

This is why the low noise, especially in the 10Hz-100kHz sidebands of the oscillator, is so crucial. Again: below and beyond these frequency extremes is trivial, because it will not affect the audio, and will not reach the analog outputs.

When the clock is used to clock the DAC chip, a similar situation occurs as described above: the noise appears at the location where the digital audio stream is converted to successive steps in a staircase wave, which represents the analog audio signal. Each step has to be EXACTLY 1/441000th, 1/96000th, 1/176400th, or 1/192000th. The injected noise introduces a deviation in time which is the exact replica of that noise. This means that the audio signal at the outputs of the DAC chip has the noise riding on it, again as an inherent part of the signal. No amount of filtering will remove the noise once it reaches this step. Again we experience that smear and detail masking, with that distinctive loss of dynamics, tonal purity, inter-transient silence, and sense of timing. Here you see how much sense it makes to reclock BOTH the inputs AND the DAC chip.

The oscillation frequency wave a tube produces is a sine wave. That's no good: It has to be converted to a square wave. This is a very delicate procedure: when the rising and falling edges of a square wave are not steep enough, there exists a certain window during which the actual transition of the data bit is not exactly time-defined. It leaves room to be either too late or too early. This is a partly random process, and partly dependent on surrounding conditions; such as power supply voltage variations, ground noise, inherent CMOS or chip crosstalk in the decoder or DAC chip, etc. All these timing variations are noise, and are called jitter from various sources. The steeper the edges, the more exactly defined the transition moment will be, resulting in less noise (jitter). When a clock produces a very stable frequency with such low jitter, there will be a more accurate reproduction of the original analog waveform of the music.

Here are a few real SuperTubeClock™ pictures of what it can do: experts will certainly like them. No other commercial clock on earth will produce a square wave as this one.

Each square wave seen below is measured on a Philips PM3295A analog 400MHz oscilloscope using LeCroy 10:1 probes. These probes attenuate the signal by a factor of 10, in order to not load the device under test with any load, resistive or capacitive. So the vertical resolution on the scope image has to be multiplied by 10. For instance when you see ~0.1V, then it is in reality measuring ~1V(AC).

The SuperTubeClock™ generating a square wave at 8.4672mHz. The vertical slope is measured at ~500mV (each black horizontal line represents 500mV counting from top to bottom). The vertical peak-to-peak travel of the square wave at this frequency is 3.5 Volts, which is excellent.

Each black vertical line going from left to right represents 10 nanoseconds. The faster a clock can go from peak to peak, the better.

Square waves present themselves more and more like sine waves the higher you go in frequency. So an 8.4672mHz wave like the one above is still identifiable as a square wave, but as we approach 42.2mHz, typically a square wave will be almost fully rounded off and appear as a sine wave. As a square wave begins to round off, it means the timing of the digital transmissions has become more insecure, allowing for the introduction of more noise and jitter that is then presented to the DAC.

Here we see the square wave generated by the SuperTubeClock™ at 42.2mHz. As you can see, the square wave still has a very discernible square shape. This means the clock is VERY fast, leaving very little time to introduce jitter and noise which can interfere with sound quality as mentioned above. Look closely at the image on the left. Each black vertical line running from left to right represents 5 nanoseconds. The time it takes the slope to go from the top bar to the bottom takes up roughly 1/3 of that black square, which is about 1.67 nanoseconds.

Think about it.. that's 1.6 BILLIONTHS of a second. Each black horizontal line in this measurement represent ~1V from top to bottom. Just as in the first wave above, the peak-to-peak travel at 42.2mHz is about 3.6 Volts, which again is excellent.

This kind of speed is crucial to ensure accuracy in detail retrieval. This in turn introduces less noise and jitter, resulting in better transients, increased clarity, improved dynamics, and a pure, musical tonality.

Digital-to-Analog Converters

Cambridge Audio Digital To Analogue Converter

NAD C 658 BluOS Streaming DAC

PrimaLuna® EVO 100 Black DAC

Rotel® 8 Channel Black Digital to Analog Converter

Rotel® Stereo Digital-to-Analog Converter

Sale $1,299.00

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