A 32-bit/384 kHz streaming platform with balanced Hyperstream IV DAC
Arcam ST25 is a 32-bit/384 kHz network streamer with balanced ESS Hyperstream IV DAC, 2.4/5 GHz Wi-Fi, AirPlay 2, Google Cast, Connect services and Roon Ready.
ST25 is the higher-level Radia streaming source, developed around a new six-layer digital platform, linear toroidal power supply and 6.5-inch OLED display. It is designed to upgrade any Hi-Fi system and is a natural partner for A25+, keeping source and amplification in separate components.
Key features
- Streaming platform up to 32-bit/384 kHz.
- Balanced ESS Hyperstream IV DAC topology.
- Spotify Connect, Tidal Connect and Qobuz Connect.
- AirPlay 2, Google Cast and Roon Ready.
- 2.4/5 GHz Wi-Fi and Ethernet.
- USB-C input and USB Media playback.
- RCA analogue, coaxial SPDIF and optical outputs.
- 6.5-inch high-resolution OLED display.
Digital platform and DAC
The digital section uses a six-layer board with a continuous ground plane to keep noise and interference away from sensitive audio circuits. The ESS Hyperstream IV DAC operates in a balanced configuration with advanced jitter reduction, while the linear toroidal supply is dedicated to audio operation.
Streaming, services and formats
Alongside Spotify Connect, Tidal Connect, Qobuz Connect, AirPlay 2, Google Cast and Roon Ready, the Arcam Radia App provides Internet Radio, podcasts, UPnP and USB Media. Arcam's site extends the distributor list with FLAC, WAV, AAC, ALAC, AIFF, DSD up to DSD256, MP3, MP4, OGG and WMA, with gapless playback.
Connections and Radia integration
ST25 provides an RCA analogue output plus coaxial and optical digital outputs. The Control Link coordinates the streamer with compatible Radia amplifiers, while the USB-C input listed by the distributor and playback from USB storage broaden local-source options beyond the home network.
Supplied accessories
The box includes a remote control with two AAA batteries, mains lead, control cable, Quick Start Guide and safety instructions. The distributor specifies a Black finish, dimensions of 432 x 99 x 329 mm and a weight of 5 kg.
