Recognized as one of the most dynamic names on the world High End audio scene in recent years, the South Korean firm HiFi ROSE has just once again displayed its extraordinary creativity in the form of his stereo integrated amplifier RA280. Equipped with a very unique aesthetic and executed with a exceptional precision in terms mechanics (the enclosure is made of stainless steel and aluminum) and electricalthis sophisticated electronics draws from the innovative engineering solutions of the formidable RA180, considered by global specialized critics as one of the achievements that have best known how to combine the analog and digital technology to put it at the service of sound reproduction with capital letters. Thus, the new HiFi ROSE incorporates a power amplification section configured in the exclusive Class AD (Advanced D) from the Asian company, which highlights the use of FET devices latest generation based on Gallium Nitride (GaN), which combines the efficiency of Class D with the smoothness and warmth of a traditional analog amplifier.
To this we must add another key subsystem: a power supply expressly developed in which resort is made to field effect transistors (FET) of Silicon Carbide instead of conventional Silicon ones, in order to increase the efficiency and stability. In this way, the RA280 is capable of delivering a high output power while minimizing heat generation, regardless of the impedance value of the speakers used. On the other hand, the adoption of a Power Factor Correction circuit (PFC) of 2.5 kW and a supercapacitor additionally increases stability and reliability. In line with the philosophy of the RA180, this new amplifier houses two amplification modules completely separated that allow 250 continuous watts per channel to be supplied over 8 or 4 ohm loads.
Next, apply a elaborate filter technology two-stage, conceived by HiFi ROSE with the aim of optimizing sound quality through curve improvement frequency response and drastic noise reduction generated by the switching inherent to Class D. For its part, the phono section is compatible with moving magnet (MM) capsules and equipped with an elaborate ultra-precise compensation circuit that minimizes coloration. The RA280 is completed with a generous connectivity which does not lack either a set of balanced line inputs or a subwoofer output, to which is added versatile tone curve control with active equalization that includes settings independent bass and treble.
