ROSE HIFI RS451 Streamer DAC Headphone Amplifier Black

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With the RS451, Rose HiFi presents a high-end streamer and headphone amplifier based on two ES9027PRO DAC chips supported by a vast array of technologies developed by the brand. The result is an AirPlay and DLNA-compatible device that has received Roon Ready and Play with Audirvāna certifications and is capable of processing signals up to PCM 32-bit 768kHz and DSD512 while delivering exceptionally clear sound reproduction.

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Reference : 21095
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2 999,00 €tax incl.

2 499,17 € tax excl.
Including 0,05 € for green tax

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2 Years warranty
 
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Rose HiFi RS451 Streamer DAC Headphone Amplifier ES9027PRO WiFi DLNA AirPlay 32bit 768kHz DSD512 Black

Rose HiFi RS451 : Front view

With the RS451, ROSE HiFi presents a high-end streamer and headphone amplifier based on two ES9027PRO DAC chips supported by a vast array of technologies developed by the brand. The result is an AirPlay and DLNA-compatible device that has received Roon Ready and Play with Audirvāna certifications and is capable of processing signals up to PCM 32-bit 768kHz and DSD512 while delivering exceptionally clear sound reproduction.

Rose HiFi RS451: ROSE DPC digital treatment

The RS451 is equipped with the ROSE DPC (Digital Processing Core) module, which optimises digital signal processing. This module reduces jitter and improves signal quality by precisely synchronising input signals with a high-precision femto clock and aligning them as an I2S signal. Completely isolated from the device's other functions, this processing ensures natural, smooth sound that is compatible with a wide range of digital formats.

Rose HiFi RS451 : Operating diagram

Rose HiFi RS451: ROSE NRA analogue processing

The analogue stage of the RS451 is equipped with the ROSE NRA (Noise Reduction Analog) filter, designed to eliminate noise and ensure a flat frequency response, even in extremely low frequency ranges. Thanks to this innovation, the RS451 ensures a fixed frequency response across the entire range without decay, faithfully and clearly reproducing the original sound information from high-resolution audio sources.

Rose HiFi RS451 : Frequency response curve

Rose HiFi RS451: DAC ES9027PRO

The RS451 incorporates two ES9027PRO DACs featuring ESS HyperStream technology to deliver impressive dynamic range conversion of +124dB and THD+N of 114dB. This means that the RS541 is capable of converting signals up to PCM 32-bit 768kHz and DSD512, ensuring perfect compatibility with all high-resolution audio formats. In addition, there is a set of seven digital filters that allow you to shape the final sound signature to your liking. To provide optimal stereo performance, the eight channels of the DACs used are subdivided into four channels operating in parallel, offering improved dynamics and virtually no noise.

Rose HiFi RS451 : DAC Section
Rose HiFi RS451 : USB interface section

Rose HiFi RS451: Custom USB interface

In order to provide DACs with the best possible digital signal to convert, the RS451 incorporates a USB interface designed to support signals up to PCM 32-bit 768kHz and DSD512. Furthermore, the latter uses isochronous signal processing to minimise latency while improving transmission stability.

Rose HiFi RS451: Advanced amplification architecture

As stated earlier, furthermore, the RS451 incorporates two ES9027PRO DAC chips. One of these is assigned to the pre-out circuit, while the second serves the headphone output stage. Each of these audio circuits is completely isolated from the other, and the two DAC chips each have a separate power supply and grounding, minimising interference and unwanted noise. Furthermore, in addition to having a dedicated DAC chip, the headphone output stage also receives 4 integrated amplifier ICs, enabling it to deliver sufficient power to drive headphones exceeding 600Ω impedance without any issues. Their ultra-fast slew rates of 1300V/µs effectively minimise signal distortion while faithfully reproducing the dynamics of the music.

Rose HiFi RS451 : headphone output stage
Rose HiFi RS451 : CPU

Rose HiFi RS451: RK3588 8-core CPU

Equipped with a new-generation RK3588 8-core processor, the RS451 offers four times the data processing performance and eight times the graphics performance of its predecessor. DRAM capacity has been doubled from 4GB to 8GB, while eMMC storage has been expanded from 8GB to 32GB, delivering more than twice the processing speeds. This enables smooth playback of large audio files and high-resolution 4K HDR videos.

Rose HiFi RS451: 8.8-inch touchscreen

The RS451 features a generous 8.8-inch touchscreen with a resolution of 1920 x 480, displaying album artwork and videos with incredible quality. The intuitive touch panel ensures exceptional ease of use, while its high resolution and wide colour gamut enable detailed and vivid visual representation.

Rose HiFi RS451 : in use on a table

Rose HiFi RS451: DSD oversampling

The RS451 offers the ability to convert PCM audio to DSD and extend it up to DSD512 using ROSE's DPC module. This allows users to enjoy various PCM audio sources with the sound characteristics unique to DSD. High-resolution oversampling preserves the fine details of the source while enriching the sound with unparalleled depth and clarity.

Rose HiFi RS451 : Sound waves

Rose HiFi RS451 : Extended compatibility

To become the nerve centre of your HiFi system, the RS451 is compatible with AirPlay and DLNA network protocols and allows you to connect to it via WiFi, Ethernet and Bluetooth. Furthermore, the RS451 is also compatible with a wide range of streaming applications such as Spotify, Apple Music, Tidal and Qobuz.

Rose HiFi RS451 : HiFi installation diagram

Rose HiFi RS451: Rose Audio Engine

The RoseAudioServer server solution developed by the brand integrates several signal processing technologies that work together to offer you the final result that is as faithful as possible to the original performance.

Audio Streamer Reader: The audio streamer reader utilises cache technology developed by HiFi ROSE to process digital input signals using system interrupts, network jitter and the base clock without distortion.

Audio Decoder: The audio decoder can process various types of audio sources and codecs to extract DSD and PCM data. In the case of a source using a lossy codec, it decodes to 32-bit floating point PCM to minimise distortion.

Audio Process: The audio process supports bit-perfect transmission, conditioning and delivering audio data in a transmission format optimised for the DAC used. It can support full MQA decoding and native DSD. It provides an advanced HiFi audio environment using various post-processing modules developed by HiFi ROSE.

Rose HiFi RS451 : Rose Audio Engine operating diagram

Rose HiFi RS451: Rose Connect

With the Rose Connect app available on iOS and Android as well as MacOS and Windows, you can control the RS451 remotely so you can control your HiFi system from anywhere.

Rose HiFi RS451 overview

Rose HiFi RS451 : Product presentation
16.35mm headphone jack output
2Output selector
3Volume control
4Power button
54-pin XLR headphone output
64.4mm headphone jack output
7Touch screen
8Bluetooth antenna
9Line input
10Trigger Input/Output
11HDMI eARC input
12Coaxial input/output
13Grounding
14Fuse
15HDMI output
16USB 3.0 ports
17USB port for WiFi dongle
18RJ45 input
19USB-B input
20Balanced XLR output
21Unbalanced single-ended RCA output
22Optical Input/Output
23IEC socket

Technical characteristics

Specifications
Product typeStreamer
Headphone amplifier
Audio inputs1x USB-B
1x Coaxial
1x Optical Toslink
1x HDMI eARC
1x Stereo RCA
Audio outputs2x USB-C 3.0
1x Coaxial
1x Optical Toslink
1x Balanced stereo XLR
1x Single-ended stereo RCA
1x 4-pin XLR headphone output
1x 4.4mm headphone jack output
1x 6.35mm headphone jack output
Video output1x HDMI 2.0 (4K UHD/60Hz)
Network connectivityEthernet 10/100/1000 BASE-T
WiFi via USB
Bluetooth connectivity5.4 aptX (A2DP1.4, Sink, AVRCP v1.6.2)
Supported network protocolsAirPlay
DLNA/UPnP
Roon Ready
Spotify Connect
SMB
FTP
WebDav
Audio formats supportedWAV, FLAC, ALAC, AIFF, WMA, OGG, APE, DFF, DSF, CDA, M4A, MP3, AAC, AMR, EC3, E-EC3, MID, MPL, MP2, MPC, MPGA
Video formats supportedASF, AVI, MKV, MP4, WMV
MPEG-1/2/4, H.263, H.264/AVC, H.265/HEVC, VC-1, VP8/9, MVC
H.264/AVC (Base/Main/High/Hight10, Level5.1): Up to 4Kx2K@30fps
H.265/HEVC (Main/Main10, Level 5.1 High-tier): Up to 4Kx2K@60fps
VP9/H.264/H.265: Up to 4Kx2K@60fps
H.264/MVC/VP8 Encoding: Up to 1080p@30
CPUOcta-Core RK3588 (Quad-core Cortex-A76 + Quad-core Cortex-A55)
GPUARM Mali-G610 MC4 (OpenGL, Vulkan, OpenCL)
DACES9027PRO
RAMLPDDR4X 8Go
Output levelXLR : 10Vrms
RCA : 5Vrms
4-pin XLR output power16Ω : 2700mW
32Ω : 2600mW
300Ω : 650mW
600Ω : 350mW
4.4mm jack output power16Ω : 2700mW
32Ω : 2600mW
300Ω : 650mW
600Ω : 350mW
6.35mm Jack output power16Ω : 1300mW
32Ω : 1000mW
300Ω : 175mW
600Ω : 90mW
Total harmonic distortion more noise (THD+N)16Ω : 0.00087%
32Ω : 0.00076%
300Ω : 0.00037%
600Ω : 0.00038%
Signal-to-noise ratio (SNR)XLR : 129dB
RCA : 126dB
XLR 4 pins : 128dB
Jack 4.4mm : 128dB
Jack 6.35mm : 118dB
Dynamic rangeXLR : 130dB
RCA : 130dB
XLR 4 pins : 140dB
Jack 4.4mm : 140dB
Jack 6.35mm : 120dB
Crosstalk140dB (20Hz-20kHz)
Frequency response10Hz-80kHz
Supported sampling ratesPCM 32bit 768kHz
DSD512
Output impedanceXLR : 1.5Ω
RCA : 1.3Ω
External storageSlot SSD 2.5" (SATA3.0, NTFS, exFAT) (SSD sold separately)
CD ripping functionVia USB
Operating temperature0-40°C
Trigger12V DC
General
Power supply voltage110-120V, 220-240V AC 50/60Hz
ConsumptionStandby : 0.5W
Idle : 5W
Playback : 20W
Dimensions430 x 337 x 92mm
Weight7kg
ColorBlack
Package1x Rose HiFi RS451
1x Remote control
1x 1.8m power cable
WiFi receiver via USB
 
Data sheet
InputBluetooth
InputHDMI
InputRCA
InputOptical
InputRJ45
InputWiFi
InputUSB
InputSPDIF
OutputXLR
OutputJack 6.35mm
OutputUSB
OutputRCA
OutputCoaxial SPDIF
OutputJack 4.4mm
OutputOptical Toslink
DAC / ADC ChipES9027PRO
Max sampling rate768kHz
Max sampling rateDSD512
ColorBlack
ClassN/A
NetworkingYes
Remote ControlYes
Streaming services & Network protocolsRoon / Roon Bridge / Roon Ready
Streaming services & Network protocolsUpnP
Streaming services & Network protocolsSpotify
Streaming services & Network protocolsTidal
Streaming services & Network protocolsAirPlay
Streaming services & Network protocolsSMB
Streaming services & Network protocolsQobuz
Streaming services & Network protocolsDLNA
 
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ROSE HIFI RS451 Streamer DAC Headphone Amplifier ES9027PRO WiFi DLNA AirPlay 32bit 768kHz DSD512 Black
With the RS451, Rose HiFi presents a high-end streamer and headphone amplifier based on two ES9027PRO DAC chips supported by a vast array of...

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