Atoll ST300 Signature: Engineered to handle the most demanding audio formats

The Atoll ST300 Signature features an expansive display that showcases the album covers of the music you are enjoying. This device adeptly recognizes and converts a wide range of popular audio formats, delivering sound quality with a resolution of up to 24 Bit and 192 kHz, as well as DSD128. Notably, the USB input is powered with up to one ampere, allowing it to support even the largest USB drives, in addition to its capability of streaming all formats over a network.

The Atoll ST300 Signature features built-in Roon software, enabling seamless integration with major streaming platforms such as Tidal, Qobuz, Spotify, and Deezer. Through this application, users can access over 100,000 radio stations. The device is compatible with DLNA and UPnP protocols and can connect to a local network via a wired RJ45 LAN connection or Wi-Fi. This connectivity allows for the playback of audio files stored on local servers and computers, supporting formats up to PCM 24 bit / 192 kHz and DSD64 / DSD128. The streamer also offers gapless playback and the ability to create custom playlists. Playback control is facilitated through the real-time streaming protocol (RTSP). While a remote control is included, using the proprietary app for Android or iOS devices provides a more user-friendly experience for managing the network player.

Critics might argue that “most streamers in this category possess similar features.” However, it is important to highlight that the capabilities mentioned above are just a fraction of what Atoll brings to the table. The standout aspect is its exceptional analog signal processing, a feature unmatched by competitors. This allows us to confidently assert that the output stages of the device exhibit the refinement and strength characteristic of pure class A, achieved through the use of dual BurrBrown PCM1792 processors, exclusive to the Atoll ST300 Signature. Subsequently, the analog signal is relayed to the power amplifier via RCA and XLR connections, with output indicators that are perfectly calibrated to align with the inputs of the Atoll AM300.

The model is equipped with an integrated Bluetooth receiver, enabling wireless audio playback from Bluetooth-enabled devices. The Atoll ST300 Signature features a robust all-metal chassis, highlighted by a thick aluminum front panel that houses various controls, including buttons for analog volume adjustment utilizing switched resistors. This volume control can be bypassed by engaging the bypass mode, which is essential when linking a network player to either a preamplifier or a full amplifier. The front panel also includes a USB port for connecting external drives and a 3.5 mm headphone jack. On the rear panel, users will find a comprehensive array of S/PDIF inputs, an additional USB port for flash drives and hard drives, a LAN port, and two digital outputs (optical and coaxial). For analog connections, there are two linear RCA inputs and one RCA output. This extensive selection of connectors allows the streamer to function effectively as a complete preamplifier. Additionally, the device features a trigger output that can activate an amplifier or DAC connected via a compatible trigger input.

Atoll ST300 Signature Specifications

• Supported audio file formats DSF, LPCM, FLAC, ALAC, AIFF, WMA, OGG, WAV, AAC, MP3
• formats when connected via local network and USB PCM up to 24 bit / 192 kHz, DSD64, DSD128
• Supported protocols UPnP, DLNA
• Online services in direct access Qobuz, Tidal, Deezer, Airable
• Linear power supplies 30 + 10 + 10 VA
• Dual DAC Burr Brown PCM1792
• Inputs LAN interface, 1 Ethernet RJ-45 connector, 2 coaxial inputs, 2 optical inputs, 2 RCA inputs
• Outputs 1x unbalanced RCA output, 1 balanced XLR output, 1 trigger output, 2 USB-A ports
• Control via an application for mobile devices based on iOS or Android is available
• Support for playback control using the protocol RTSP yes
• Large 5-inch color screen (800*480 pixels)
• Wi-Fi 802.11 b/g/n
• Built-in Bluetooth receiver
• Supported file systems of external drives when connected via USB FAT32, NTFS, EXT2/3/4
• Remote control
• Dimensions (WxHxD) 440x90x255 mm
• Weight 7 kg