All New HiFi Rose RS451 - Network Streamer

The RS451 is HiFi ROSE’s next-generation network streamer, integrating 
the brand’s advanced digital audio technologies. It inherits the high-performance architecture of the flagship RS151, while offering practical usability and space efficiency optimized for desktop audio setups.

Equipped with a high-performance ES9027PRO DAC, the RS451 applies separate DAC circuits for both pre-out and headphone output, delivering refined, high-end sound tailored to each listening environment. The pre-out section is designed
with precision DAC circuitry to integrate seamlessly into high-end audio systems,
while the dedicated headphone DAC is paired with four high-performance amplifiers to achieve precise impedance matching, low noise, and powerful driving performance.

The RS451 is a network streamer that strikes a finely tuned balance of performance, design, and usability. It sets a new standard for audio experiences from HiFi ROSE.

The RS451 is equipped with an LCD touchscreen that delivers an intuitive and seamless user experience. Its 8.8-inch display with a high resolution of 1920 × 480 offers a wider screen and superior visibility compared to other products in its class, ensuring exceptional ease of operation. Reflecting ROSE’s “Visible Audio” philosophy, the wide-view LCD provides vivid clarity and allows for intuitive control of the device, delivering a user-friendly interface and a more immersive listening experience.

Display size: 237 mm (W) × 67 mm (H)

Resolution: 1920 × 480

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.

he 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.

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 ultra-fast 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, high-resolution sound with precision and clarity in any headphone environment.

USB DAC Performance & Stability

The RS451 is equipped with a USB Audio Class 2.0 interface designed to reliably receive high-resolution audio signals from external sources without loss. It supports up to 32-bit / 768kHz PCM and native DSD512, and adopts an isochronous transfer mode to minimize latency and significantly improve transmission stability. This design enables top-tier sound quality through USB alone, even without an external DAC, and delivers even greater precision when paired with the RS451’s high-performance DAC and DPC™ architecture.

 Functionally Optimized I/O Configuration

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. HiFi ROSE’s refined build quality and seamless layout help the RS451 integrate naturally into desktop or living room audio systems, enhancing both visual and functional harmony.

Main Processor Architecture