HiFi Rose RA280 Reference Integrated Amplifier

HiFi Rose RA280 Reference Integrated Amplifier Key Features:

• Class AD amplification uses super-efficient GaN (Gallium nitride) FET output switching
• Integrated MM Phono Stage
• Motorized Remote Control
• Level Meters
• 250 watts x 2 into 8 ohms
• 250 watts x 2 into 4 ohms

Product Description: 

The RA280 stands as a cutting-edge integrated amplifier, drawing upon the pioneering advancements of its predecessor, the RA180. Immerse yourself in the pristine, natural audio fidelity of the RA280, where sound is delivered in its most authentic form, bridging the gap between digital and analog realms with unparalleled precision. Its robust power damping and minimized dead time contribute to its exceptional linearity, offering an auditory experience that captures the pure spirit of music. With the RA280, prepare to engage with music in its truest essence, providing a unique listening journey that resonates deeply.

Form Follows Sound

The RA280's design philosophy emphasizes the harmony of its internal purity with its external form, embodying ROSE's commitment to delivering pure, natural sound. This principle is meticulously applied to every component, ensuring that the amplifier's aesthetic complements its acoustic performance. The RA280 stands out for its exceptional build quality and thoughtful design, achieving a balance between form and function. Its solid aluminum chassis, with a matte finish and carefully crafted grooves, not only enhances durability and performance but also contributes to its modern and progressive appearance. The front panel, adorned with vintage-inspired buttons and controls, adds an element of refined elegance and sophistication. With the RA280, you're not just enhancing your auditory experience; you're elevating your space with the sheer elegance of a design that beautifully merges the interior with the exterior, making it a statement piece in any setting.

Class AD Amplifier with Next-Generation GaN FET

In the realm of Hi-Fi audio, the progression of amplifier technology has seen the sequential evolution from Class A, through Class AB, to Class D amplifiers. Class D, leveraging the forefront of technological advancements, stands out for its remarkable efficiency over its Class A and AB counterparts, boasting notable enhancements in the signal-to-noise ratio and reduction in total harmonic distortion. Despite these advancements, Class D amplifiers have historically faced criticism for not matching the sound quality of their analog predecessors, attributed to the inherent constraints of digital circuitry.

Addressing this challenge, HiFi ROSE has pioneered the development of Class AD amplifier technology, integrating gallium nitride (GaN) FETs, marking a significant breakthrough in the RA280. This innovative approach marries the unparalleled efficiency and power amplification benefits of Class D amplifiers with a sound quality that rivals traditional analog amplifiers. The result is a seamless blend of the best of both worlds: maintaining the technological efficiency and amplification prowess of Class D, while elevating sound quality to levels previously associated with analog systems.

Two Completely Separated Mono Amplifier Modules

Crafted with precision, the RA280 features two distinct amplifier modules functioning akin to mono amplifiers, delivering robust support of 250 W (4 ohms and 8 ohms) for each left and right channel, culminating in a stereo output of 500 W. Setting a new standard in audio excellence, the RA280 incorporates HiFi ROSE's two-stage analog filter technology, meticulously engineered to optimize sound quality.

At the heart of this technology lies HiFi ROSE's LC filter, renowned for its exceptional frequency response capabilities. With -1dB attenuation up to 65 kHz and -3 dB attenuation up to 85 kHz, this filter significantly mitigates carrier noise inherent in Class D amplifiers, resulting in a clearer, more pristine sound across all frequencies. Notably, this advancement enhances spatial description and resolution, imbuing the audio output with a refined analog character, elevating the listening experience to new heights.

High-Efficiency Power Supply

The RA280 represents the forefront of technological innovation in audio amplification, integrating a power supply circuit that is a testament to HiFi ROSE's commitment to innovation. Unlike traditional designs that rely on silicon FETs, the RA280's power circuit is built around a silicon carbide (SiC) FET. This choice of material marks a significant leap forward, as silicon carbide FETs are renowned for their superior voltage handling, thermal resistance, and overall efficiency compared to their silicon counterparts. This results in a power supply that not only operates more efficiently but also produces less heat, ensuring that the RA280 can deliver high output levels while maintaining optimal thermal performance and sound quality.

Further distinguishing the RA280 is its implementation of a 2.5 kW power factor correction (PFC) circuit, a proprietary design by HiFi ROSE. This circuit, alongside a high-capacity condenser, ensures that the amplifier maintains exceptional performance, even in scenarios with rapid load changes. This design choice significantly enhances the RA280's ability to respond robustly, ensuring unmatched stability and reliability in its performance. This meticulous approach to design and material selection positions the RA280 as a pinnacle of audio amplifier technology, capable of delivering unparalleled sound quality with efficiency and precision.

Specifications: 

Dimensions and Weight: 

Overall - 430 x 355 x 103 mm (W x D x H)

Product Weight - 9.5 kg