Accuphase DP-570S MDS SA-CD Player: A Plain-English Guide

What exactly is the Accuphase DP-570S MDS?

The Accuphase DP-570S MDS is a high-end disc player and digital audio processor that plays SA-CD and CD discs while also acting as a hub for other digital sources. In simple terms, it is the component that reads your discs and turns the digital information stored on them into an analog music signal your amplifier can understand. It sits between your disc collection and your amplifier, and thanks to its built in digital inputs, it can also serve as the heart of a wider digital system.

Where does it fit in a hi-fi system?

The DP-570S MDS fits between your source material and your amplifier, functioning as both a disc player and a digital-to-analog converter. If you picture a chain, music flows from your discs or connected devices, through the DP-570S where it is decoded and converted, and then out to your amplifier and speakers. Because it handles both roles, it can simplify your setup and reduce the number of separate boxes you need while still delivering the performance a serious system deserves.

Understanding the Core Technology

What does MDS conversion actually do?

MDS stands for Multiple Delta Sigma, and it is the method the DP-570S uses to convert digital data into analog sound. Digital music is stored as a long string of numbers, and the job of a converter is to translate those numbers back into a smooth, continuous analog waveform. The MDS approach uses several conversion circuits working together in parallel, which helps reduce errors and noise that a single circuit might introduce. In everyday listening, this means cleaner, more natural sound with fewer of the digital artifacts that can make music feel harsh or flat.

Which discs can the DP-570S MDS play?

The DP-570S plays SA-CD and CD discs. CD is the familiar compact disc format most people already own, while SA-CD, or Super Audio CD, is a higher resolution format that can hold more musical detail. Being able to play both means you can enjoy your existing CD library today and take advantage of SA-CD releases when you want the extra fidelity that format can offer.

Making Sense of the Key Specifications

What does the frequency response of 0.5 Hz to 50 kHz mean for me?

The frequency response of 0.5 Hz to 50 kHz, +0 / -3 dB, describes the range of sound the player can reproduce accurately. Human hearing typically covers roughly 20 Hz to 20 kHz, so the DP-570S extends well beyond both ends of that range. The practical benefit is that everything you can actually hear falls comfortably inside the player's capabilities, so deep bass and delicate high frequencies are reproduced without being squeezed or rolled off at the edges.

Why does total harmonic distortion of 0.0006% matter?

Total harmonic distortion measures how much the player adds unwanted extra tones to the original signal, and at 0.0006% the amount is extremely small. Distortion is essentially coloration or grit that was not in the recording. A figure this low means the DP-570S stays faithful to what the musicians actually played, so voices and instruments sound like themselves rather than a slightly altered version.

What does a signal to noise ratio of 121 dB tell me?

The signal to noise ratio of 121 dB describes how much louder the music is compared to the background hiss and hum the player itself produces. A higher number means the noise sits further below the music and is effectively inaudible during listening. In practice, this lets you hear quiet passages, the natural decay of a note, and subtle details clearly, without a layer of electronic noise getting in the way.

What is the meaning of 118 dB dynamic range for SACD?

The dynamic range of 118 dB for SACD describes the distance between the softest and loudest sounds the player can reproduce. A wide dynamic range means the player can handle a whisper-quiet moment and a full orchestral crescendo in the same piece without compressing either one. This gives music a sense of life and scale, so soft moments feel intimate and loud moments feel powerful.

Connections and Controls

What digital inputs does the DP-570S MDS have?

The DP-570S offers HS-LINK, USB Type-B, coaxial, and optical digital inputs. These let you feed digital audio from other sources into the player so it can use its MDS conversion for them too. HS-LINK is Accuphase's own high quality digital connection, USB Type-B lets you connect a computer, and coaxial and optical are common digital connections used by many devices. Having all four means the DP-570S can act as the central converter for a range of digital sources, not just discs.

What analog outputs are available?

The DP-570S provides both balanced (XLR) and unbalanced (RCA) analog outputs. These are the connections that carry the converted music signal to your amplifier. Balanced XLR connections are designed to reject noise over the cable run and are often preferred in higher-end systems, while unbalanced RCA connections are the widely used standard found on most equipment. Offering both means the player will match whatever inputs your amplifier has.

What digital outputs does it offer?

The DP-570S includes HS-LINK, coaxial, and optical digital outputs. These send the raw digital signal out to another device, such as a separate digital-to-analog converter, before conversion takes place. This gives you flexibility if you later add other Accuphase components, letting the DP-570S serve as a disc transport while another unit handles the conversion.

Build Quality and Power

Why does Accuphase build quality matter here?

Accuphase build quality matters because a source component's job is to preserve tiny, delicate signals, and careful construction protects those signals from interference and wear. The DP-570S weighs 18.4 kg and measures 465 x 151 x 393 mm, which reflects the substantial internal construction and solid chassis. That mass and rigidity help control vibration and keep sensitive circuitry stable, which supports consistent, reliable performance over many years of use.

What are the power requirements and consumption?

The DP-570S runs on AC 120 V at 50/60 Hz and consumes 18 W. The 18 W figure is modest, which tells you the player is efficient and does not run hot or place heavy demands on your electrical supply. This makes it easy to live with day to day and comfortable to leave in a rack alongside other components.

Who the DP-570S MDS Is For

Who should consider the Accuphase DP-570S MDS?

The DP-570S MDS suits anyone who values physical discs and wants a genuinely high performance way to play them, along with the flexibility to connect other digital sources. If you have built a CD collection over the years, are curious about the added detail of SA-CD, or want a single, well made component that can both play discs and convert digital signals from a computer or streamer, this player is designed with you in mind. It is a strong fit for someone stepping into high-end audio who wants a dependable, versatile centerpiece that can grow with a system over time. Newcomers often worry that high-end gear will be complicated, but the DP-570S is straightforward in daily use. You load a disc or select a digital input, and the player handles the rest, delivering clean, natural sound to your amplifier. With its combination of thoughtful engineering, comprehensive connections, and solid construction, it offers a welcoming and rewarding way to enjoy your music at a high level.