ROSE HIFI RA280 Amplifier Black

With the RA280, Rose HiFi is offering an integrated amplifier capable of producing a power of 2x250W under 4Ω and 8Ω and positioning itself as the direct heir to the RA180. It takes the innovative digital/analogue technologies of its predecessor and pushes them furthermore, reducing harmonic distortion and enhancing the signal-to-noise ratio. Moreover, in the same way as its predecessor, the cutting-edge technologies are housed in a sleek aluminium case that is a perfect blend of vintage and modern.

Rose HiFi RA280: Class AD amplifier and GaN FET

A true revolution in the world of amplification, Rose HiFi is continuing to develop its innovative Class AD architecture, taking advantage of both the benefits of Class A/AB amplifiers and Class D structures. This particular design makes it possible to achieve excellent linearity, thanks in particular to the use of a new material, GaN (Gallium Nitride).

In terms of power amplifier design, the Class D topology theoretically offers total linear output at 0% distortion and 100% efficiency. To achieve this theoretical perfection, the speed and accuracy of switching operations must be assured.

To correct this problem, the RA280 features a perfectly linear output using Gallium Nitride FET field effect transistors rather than silicon FETs, which directly affect switching precision and speed. This totally linear output exceeds the capabilities of the Class D topology and provides a natural sound reproduction, close to that of an analogue amplifier.

Rose HiFi RA280: Tone control

By default, the RA280 output has a completely neutral timbre, giving you total control over the tone. In fact, you can adjust the bass (100Hz) and treble (10kHz) by ±15dB. For its tone control, the RA280 uses a high-fidelity active equaliser with a slope of 12db instead of a passive equaliser with a slope of just 6dB.