Nya RS451 nästa generation av HiFi-Rose nätverksstreamers. Digital arkitektur från den större modellen RS151 men ett mindre format och mer anpassad för “desktop” setup.
Med förstklassiga komponenter, separata DAC-kretsar för hörlurar och pre-out, samt oberoende strömförsörjning för analoga och digitala sektioner, uppnår RS451 prestanda på referensnivå. Tack vare den här arkitekturen är nivån på ROSE:s avancerade streamers nu för första gången tillgänglig i en ny prisklass – perfekt för den växande hörlursgemenskapen.
The RS451 is equipped with two ES9027PRO DACs, with one dedicated to the pre-out and the other to the
headphone output. This ensures that the analog audio signal paths are completely separated. Each DAC
has its own independent power supply and grounding, which effectively blocks interference and minimizes
noise, resulting in clean audio output. The high-performance headphone amplifier section consists
of four individually driven amplifiers that provide strong and stable output even for low-impedance
headphones. The completely isolated power supply design for each channel helps suppress crosstalk,
while the ultra-low-noise circuitry maintains linear response across the full frequency range. This design
guarantees consistent driving performance under various impedance conditions and delivers outstanding
transparency and tonal balance, even when playing high-resolution audio content.
Enhanced Processing with Next-Gen 8-Core CPU
Measured Precision in Headphone Performance
The RS451’s headphone amplifier applies four high-output amplifier ICs in a parallel configuration,
delivering stable drive capability even with high-impedance headphones exceeding 600Ω. Its ultrafast slew rate of 1300V/μs minimizes signal distortion and enables highly responsive performance,
accurately reproducing transients and dynamic changes in music. The THD+N remains consistently
low across all impedance ranges, demonstrating the RS451’s ability to deliver balanced, highresolution sound with precision and clarity in any headphone environment.
ROSE NRA(Noise Reduction Analog)™ Filter
The analog stage of the RS451 features the ROSE NRA™ filter, which eliminates noise and enables
flat frequency response even in the very low-frequency range. As a result, the RS451 maintains a
consistent frequency characteristic across the entire spectrum without roll-off, delivering original
sound information from high-resolution sources with clarity and fidelity.
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 optimized for Hi-Fi audio
applications. It offers an impressive dynamic range of up to +124dB and a THD+N of 114dB,
enabling delicate and clean sound reproduction. Supporting PCM up to 768kHz and DSD512,
it ensures perfect compatibility with high-resolution audio formats. With seven built-in digital filters,
users can fine-tune the sound signature to match their preferences. In the RS451, the DAC’s eight
channels are configured in a 4-channel parallel structure for stereo output, achieving even greater
dynamic range and ultra-low noise performance.
Advanced DAC Architecture
The RS451 features the next-generation 8-core CPU RK3588, offering a 4x increase in information
processing performance and an 8x boost in graphics performance compared to its predecessor.
In addition, the DRAM capacity has been upgraded from 4GB to 8GB, and the eMMC storage has
been expanded from 8GB to 32GB, resulting in a processing speed that is more than twice as fast.
This allows for smooth playback of large audio files as well as 4K high-resolution videos in HDR,
while the media library capacity has grown by approximately three times, supporting over 1 million
tracks.
• Specifications
Preamp Outputs Output Impedance 1.5Ω(XLR), 1.3Ω(RCA)
Output Level 10Vrms(XLR), 5Vrms(RCA)
THD+N 0.00025%(XLR) (1kHz, 10Vrms), 0.00025%(RCA) (1kHz, 5Vrms)
Signal to Noise Ratio 129dB(XLR), 126dB(RCA)
Dynamic Range 130dB
Stereo Crosstalk 140dB (20Hz – 20kHz)
Frequency Response 10Hz – 80kHz (+/-1dB)
HP Outputs Jack XLR(Balanced), 4.4mm(Balanced), 6.35mm(Unbalanced)
CPU 16Ω 32Ω 300Ω 600Ω
XLR
4.4mm
6.35mm
2,700mW
2,700mW
1,300mW
2,600mW
2,600mW
1,000mW
650mW
650mW
175mW
350mW
350mW
90mW
THD+N 0.00087% 0.00076% 0.00037% 0.00038%
Signal to Noise Ratio 128dB(XLR), 128dB(4.4mm), 118dB(6.35mm)
Dynamic Range 140dB(XLR), 140dB(4.4mm), 120dB(6.35mm)
Frequency Response 10Hz – 80kHz (+/-1dB)
Technical PSU Toroidal Linear Power Supply
CPU Quad core Cortex-A76 + Quad-core Cortex-A55
RAM LPDDR4X 8GB
GPU ARM Mali-G610 MC4(OpenGL, Vulkan, OpenCL)
DAC ES9027 PRO(ESS)
HP DAC ES9027 PRO(ESS)
Oscillator Highly Precise Femto Clock
Inputs Digital USB 2.0 Type-B
Coaxial
Optical
HDMI eARC
PCM 32bit/768kHz, DSD512(22.6MHz)
PCM 32bit/384kHz, DSD128(5.6MHz) (only DoP)
PCM 32bit/192kHz, DSD64(2.8MHz) (only DoP)
PCM 24bit/192kHz
Analog Line In
Service USB 3.0 Type-C
Trigger DC 3.3V – 12V
Outputs Digital USB 3.0 Type-A
Coaxial
Optical
PCM 32bit/768kHz, DSD512(22.6MHz)
PCM 32bit/384kHz, DSD128(5.6MHz) (only DoP)
PCM 32bit/192kHz, DSD64(2.8MHz) (only DoP)
Analog Unbalanced, Balanced
Video HDMI 2.0 (4K UHD / 60Hz)
Trigger DC 12V
Network Connectivity Ethernet
WiFi
Bluetooth
10/100/1000 BASE-T(1Port)
USB Dongle
5.4 aptX (A2DP1.4, Sink, AVRCP v1.6.2)
Streaming Protocol Bluetooth, AirPlay, DLNA/UPnP, Roon Ready, Spotify Connect
Storage SMB, FTP, WebDav
Storage External 3 × USB 3.0 Type-A
1 x 2.5" SSD(SATA 3.0, NTFS, exFAT)
Feature CD Ripping Support(By external USB CD Drive)
Power Input Voltage AC 110–120V, 220–240V, 50/60Hz
Power Consumption Standby
Idle
Playback
0.5W
5W
20W
Protection 3A Thermal Circuit Breaker
Physical Display 8.8" IPS LCD & Capacitive Touch Screen (MIPI)
Dimension 430(W) × 337(D) × 92(H) mm
Weight 7kg
Material Aluminum / Rust-proof Steel / ABS
Finish Silver, Black
IR 38kHz IR Receive
