HiFi Rose RS 451 Music Streamer & DAC
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The HiFi Rose RS451 is a next-generation network streamer, combining HiFi Rose’s advanced digital audio technologies with a new variety of output options and a new footprint that’s ideal for both traditional hi-fi systems and desktop headphone listening.
The ES9027PRO used in the RS451 is a high-end 32-bit, 8-channel DAC chip designed with ESS’s HyperStream® architecture, delivering precise performance optimised for hi-fi audio applications. Its class leading specifications enabling delicate and clean sound reproduction. Supporting PCM up to 768kHz and DSD512, it ensures perfect compatibility with high-resolution audio formats. The variety of digital filters also offer a degree of sound customisation, to suit different styles of music or listening preferences.
By utilising two DAC chips within its advanced circuitry, the RS451 can deploy one chip for the traditional pre-out stage, and a separate one for the headphone output stage. In this way, the two signal paths are completely separated. The high-performance headphone stage further consists of four individually driven amplifiers that provide strong and stable output, even for low-impedance headphones. Further clarity and performance are guaranteed by the isolated power supply design for each channel. The result is a truly first-class headphone system, all in one box.
The RS451 makes use of Rose’s Digital Processing Core (DPC) Module, which was originally developed for the RD160 DAC and further employed in the RS151. This module precisely synchronizes any digital signal the DAC receives with a high-precision Femto clock as an I2S signal. It applies clock synchronization and locking processes to minimise jitter, allowing for accurate processing and a natural, clear sound performance. By isolating this module away from the wider CPU circuitry, it’s possible to eliminate signal distortion and interference that’s generated within the unit from the digital audio path. The result is accurately processed data, resulting in a natural and clean sound across a wide range of digital formats.
At the centre of the RS451 is ROSE OS, HiFi Rose’s Android-based operating system, which opens a world of music and video content to your streamer. ROSE OS supports local network music playback within Rose’s Music app, as well as CD playback and ripping via a connected optical drive. There is also support for internet radio, Spotify Connect, Tidal, Qobuz and Apple Music. The RS151 is also Roon Ready and Plays with Audirvāna certified. In addition, the operating system offers support for video playback, either locally or within the Tidal or Rose Tube apps.
As well as ROSE OS, the RS451 makes use of the ROSE Audio Engine, an in-house development that ensures all digital audio is delivered to the DAC without loss for precise signal processing.
The upgraded 8-Core CPU used in the RS451 boasts powerful data processing and improved graphics performance. The result of this upgrade is the best ROSE OS experience yet, including support for larger music libraries.
The RS451 offers a well-organized rear panel layout with intuitive port placement, tailored for real usage scenarios. It includes only the essential input and output options for high-fidelity playback, arranged for both simplicity and connection stability. The spacing between ports is carefully considered to reduce interference between devices, making installation more convenient and flexible across various environments.
With support for high-quality Bluetooth playback, USB playback, a hi-res coaxial input (supporting up to 32-bit / 384kHz PCM and DSD128), an optical input, HDMI eARC connection and a traditional RCA input, as well as balanced and unbalanced outputs – there’s very few systems the RS451 is not at home in.
The RS451 is engineered to delivery high-fidelity audio performance from a slim and space-efficient form factor. With HiFi Rose’s signature aluminium enclosure employed once again, there’s a reassuring quality that merges with the high aesthetic appeal of the product.
Similarly, the new high-resolution, wide-angle 8” display offers the same intuitive control as other HiFi Rose streamers but is now flanked for the first time by the various headphone connections on one side, and the precisely machines volume knob on the other side, for a sense of visual balance as well as practical usability.
Features
- Vibrant 8.8" IPS LCD with Capacitive Touchscreen (MIPI) for responsive, wide-angle viewing.
- ROSE DPC™ Digital Processing Core and ROSE NRA™ Noise Reduction Analog architecture deliver flat, transparent sound with vanishingly low distortion (0.00025% THD+N).
- Built-in high-power headphone amplifier with balanced XLR and 4.4mm outputs for true reference-grade listening.
- Independent power supply per channel and toroidal linear PSU ensure ultra-low noise and superior stereo separation.
- High-precision Femto clock for exceptional timing accuracy and jitter control.
- Native DSD512 / PCM 32-bit 768kHz decoding with ESS ES9027PRO DAC.
Supports AirPlay, DLNA, Roon Ready, Spotify Connect, TIDAL, Qobuz, Apple Music, RoseTube, and Internet Radio. - SSD caching playback for smoother streaming and faster response.
- External master clock input and Fiber Optic Ethernet & USB connectivity for enhanced digital isolation.
- Precision-milled aluminum chassis designed to minimize vibration and thermal noise.
- Seamless app control via the intuitive ROSE Connect app (Android, iOS, PC).
Specifications
| Operating System: | HiFi ROSE OS (based on customized Android) |
| Dimensions: | 430(W) × 337(D) × 92(H) mm |
| Weight: | 7kg |
| Display: | 8.8" IPS LCD & Capacitive Touch Screen (MIPI) |
| CPU: | Quad-core Cortex-A76 + Quad-core Cortex-A55 |
| GPU: | ARM Mali-G610 MC4 (OpenGL, Vulkan, OpenCL) |
| Memory: | LPDDR4X 8GB |
| Cache Storage: | 1 × 2.5" SSD (SATA 3.0, NTFS/exFAT) |
| Network Connection | |
| Network: | Ethernet 10/100/1000 BASE-T |
| WiFi: | USB Dongle (2.4/5 GHz Dual-Band Supported) |
| Bluetooth: | v5.4 aptX (A2DP 1.4, Sink, AVRCP v1.6.2) |
| Streaming Playback | |
| Supported Streaming Platforms: | AirPlay, DLNA/UPnP, Roon Ready, Spotify Connect, Bluetooth |
| Supported Streaming Services: | TIDAL, Qobuz, Apple Music, RoseTube, Rose Radio, Internet Radio |
| Input/Outputs | |
| Audio Input: | USB 2.0 Type-B, Optical × 1, Coaxial × 1, HDMI eARC, Line In (RCA) |
| Audio Output: | USB 3.0 Type-A, Optical × 1, Coaxial × 1, Balanced (XLR), Unbalanced (RCA), Headphone Out (XLR/4.4 mm/6.35 mm) |
| Video Output: | HDMI 2.0 × 1 (4K UHD / 60 Hz) |
| Media Connections | |
| File System: | NTFS / exFAT |
| Network Protocol: | SMB / FTP / WebDav |
| Storage Interface: | 3 × USB 3.0 Type-A Ports + 1 × 2.5" SSD Bay (SATA 3.0) |
| Supported Codec | |
| Audio: | WAV, FLAC, ALAC, AIFF, WMA, OGG, APE, DFF, DSF, CDA, M4A, MP3, AAC, AMR, EC3, E-EC3, MID, MPL, MP2, MPC, MPGA / PCM 8 kHz – 768 kHz (8/16/24/32 bit) / Native DSD 64 – 512 (2.8 – 22.6 MHz) |
| Video: | ASF, AVI, MKV, MP4, WMV, MPEG-1/2/4, H.263, H.264/AVC, H.265/HEVC, VC-1, VP8/9 (up to 4K × 2K @ 60 fps) |
| Power | |
| Input Voltage: | AC 110–240 V 50/60 Hz |
| Circuit Breaker: | 3 A Thermal Circuit Breaker |
| Software Update | |
| SW Update: | Via Internet (OTA), USB, or ROSE Store |
| Remote Control | |
| App: | ROSE Connect (Android, iOS, PC) |
| Physical: | IR Remote Control, Bluetooth Remote Control |
| Accessories | |
| Included Accessories: | Power Cord, Remote Controller (with AAA Batteries), User Manual, SSD Mounting Screws, USB WiFi/BT Dongle + Holder |
| Operating System: | Customized Android 7.1 |
| Dimensions: | 430(W) x 317(D) x 125(H) mm |
| Weight: | 12kg |
| Display: | 15.4" TFT LCD & Capacitive Touch Screen (eDP) |
| CPU: | Dual-Core Cortex-A72 and Quad-Core Cortex-A53 with separate NEON coprocessor |
| GPU: | ARM Mali-T860 MP4 Quad-Core GPU |
| Memory: | LPDDR4 4GB |
| Cache Storage: | NVMe SSD 256GB |
| Network Connection | |
| Network: | SFP Ethernet 10/100/1000 BASE-T(SFP COPPER Type) |
| WiFi: | 802.11ac Dualband USB Wireless LAN Card (Dongle) |
| Bluetooth: | V4.2 (USB Dongle) |
| Streaming Playback | |
| Supported Streaming Platforms: | Airplay, DLNA, Roon Ready, Spotify Connect, Bluetooth |
| Supported Streaming Services: | TIDAL, Qobuz, Apple Music, Bugs, ROSE Tube, Internet Radio, ROSE Podcast |
| Input/Outputs | |
| Audio Output: | Optical x 1, Coaxial x 1, AES/EBU OUT x1, HDMI 12S OUT x 1 |
| Video Output: | HDMI 2.0 x 1 (up to 3840 x 2160/60Hz) |
| Media Connections | |
| File System: | NTFS / exFAT/FAT32 |
| Network Protocol: | SMBv2/FTP/WebDav |
| Storage Interface: | USB3.0 x 2, SATA X 1, USB 3.0 Fiber |
| Clock Sync Input: | 5002 BNC x 1, 7502 BNC x 1 Inputable Frequency: 10MHz |
| Supported Codec | |
| Audio: | MQA, WAV, FLAC, AIFF, WMA, MP3, OGG, APE, DFF, DSF, AAC, CDA, AMR, APE, EC3, E-EC3, MID, MPL, MP2, MPC, MPGA, M4A, ALAC, PCM : 8kHz~768kHz(8/16/24/32bit per Sample), Native DSD: DSD64(2.8MHz)/ DSD128(5.6MHz)/DSD256(11.2MHz)/ DSD512(22.4MHz) |
| Video: | ASF, AVI, MKV, MP4, WMV, H.264/AVC, Base/Main/High/High10 profile @ level 5.1; up to 4Kx2K @ 30fps H.265/HEVC, Main/Main 10 profile @ level 5.1 High-tier; up to 4Kx2K @ 60fps VP9, profile 0, up to 4Kx2K @ 60fps MPEG-1, ISO/IEC 11172-2, up to 1080P @ 60fps MPEG-2, ISO/IEC 13818-2, SP@ML, MP@HL, up to 1080P @ 60fps MPEG-4, ISO/IEC 14496-2, SP@LO-3, ASP@LO-5, up to 1080P @ 60fps VC-1, SP@ML, MP@HL, AP@LO-3, up to 1080P @ 60fps |
| Power | |
| Input Voltage: | AC100-240V 50/60Hz |
| Circuit Breaker: | 6A Thermal Circuit Breaker |
| Software Update | |
| SW Update: | SW update via internet, USB OTA, ROSE Store |
| Remote Control | |
| App: | ROSE Connect (Android, iOS, PC) |
| Physical: | IR Remote Control, Bluetooth Remote Control |
| Accessories | |
| Included Accessories: | Power Cord x 1, Remote Controller x 1 (AAA Battery x 2), Manual x 1, SSD Screw x 4 SFP RJ45 COPPER TRANSCEIVER MODULE x 1, WiFi/BT Dongle x 1 |