{"product_id":"hifi-rose-ra280-integrated-amplifier-with-phono-250w-x2","title":"HiFi Rose RA280 Integrated Amplifier with Phono - 250W x2","description":"\u003cp\u003e\u003cstrong\u003eTop-notch Master Integrated Amplifier RA280\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eThe RA280 is an integrated amplifier that inherits the innovative technologies used in RA180. Enjoy pure natural sound as close to the original sound as you can get with the RA280: a near-perfect sound that transcends the boundaries between digital and analog technologies with excellent linearity achieved through strong power damping and short dead time.\u003cbr\u003e\u003c\/p\u003e\n\u003cp\u003eThe RA280 offers a special listening experience that lets you feel the true essence of music.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eForm follows Sound\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eThe design of the RA280 is differentiated by its inner purity. ROSE pursues a pure natural sound that is reflected in all parts based on our design philosophy of externalizing the internal parts.\u003c\/p\u003e\n\u003cp\u003eThe RA280 provides high quality in terms of overall solid finish and functionality, while at the same time achieving harmony between the interior and exterior through a design that focuses on acoustic aspects. The sturdy aluminum chassis at the top, matte finish, and elaborate arrangement of grooves satisfy both functionality and progressive exterior design.\u003c\/p\u003e\n\u003cp\u003eAdditionally, the front buttons and control panel embody vintage elegance and sophistication. The RA280 will make your space even more classy by adding the\u003cbr\u003epure beauty of a perfectly blended interior and exterior design.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eClass AD Amplifierwith Next-Generation GaN FET\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eIn the Hi-Fi audio field, amplifier technology has continued to evolve in the order of Class A, Class AB, and Class D. Class D amplifiers that utilize the latest technology are outstandingly superior in efficiency compared to Class A or AB amplifiers,\u003cbr\u003eand have achieved significant improvements in signal-to-noise ratio (S\/N) and total harmonic distortion (THD).\u003c\/p\u003e\n\u003cp\u003eHowever, despite these advantages, evaluation shows a lack of sound quality compared to analog amplifiers due to the limitations of digital circuits. To overcome these limitations, HiFi ROSE independently developed Class AD amplifier technology using GaN (gallium nitride) FETs and applied this technology to the RA280.\u003c\/p\u003e\n\u003cp\u003eIt achieved sound quality comparable to analog while maintaining the efficiency and power amplification of existing Class D amplifiers.\u003c\/p\u003e\n\u003cp\u003e\u003cimg alt=\"\" src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0003\/3275\/9084\/files\/RA280_SMPS_Cover_480x480.webp?v=1709244636\"\u003e\u003c\/p\u003e\n\u003cp\u003eClass D amplifiers are known for their high efficiency, low total harmonic distortion rate, and theoretical topology of perfectly linear output. The speed and accuracy of switching operations are essential to achieve perfect Class D design theory. However, conventional products are lacking in linearity compared to Class A and AB amplifiers due to the limitations of silicon FETS (field effect transistors).\u003c\/p\u003e\n\u003cp\u003eIt is clear that conventional products had limitations in providing smooth, natural sound quality.To improve on these problems, RA280 uses the innovative new material gallium nitride (GaN) to replace the previously used silicon FET (field effect transistor). This dramatically improves dead time to 1\/10 of the previous level and implements linear output with a switching speed close to zero.\u003c\/p\u003e\n\u003cp\u003eThis improvement in linearity is the result of pushing the limitations of Class D amplifiers, allowing smooth, natural reproduction of sound quality with the fluidity of an analog amplifier.\u003cbr\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0003\/3275\/9084\/files\/Screenshot2024-02-29at4.46.16PM_480x480.png?v=1709243265\" alt=\"\"\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eBalance Control for Bass and Treble\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eThe default output trend of the RA280 is flat and equipped with a tone control function, allowing for 15 dB adjustment of bass (100 Hz) and treble (10 kHz).\u003cbr\u003e\u003c\/p\u003e\n\u003cp\u003eThe tone control circuit is equipped with a high-fidelity active EQ (OP-AMP: 12 dB slope) instead of passive (CR), with a gentle 6 dB slope\u003c\/p\u003e\n\u003cp\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0003\/3275\/9084\/files\/Screenshot2024-02-29at4.46.44PM_480x480.png?v=1709243230\" alt=\"\"\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003ePOWER:\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eOUTPUT: ( Maximum Power: 500W )\u003c\/li\u003e\n\u003cli\u003eVOLTAGE: AC100-240V, 50\/60Hz (Standby Mode Power Consumption \u0026lt;0.5W)\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cstrong\u003eAMPLIFIER OUTPUT:\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e4 Ω: 250W x 2ch (500W)\u003c\/li\u003e\n\u003cli\u003e8 Ω: 250W x 2ch (500W)\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cstrong\u003eINPUT SENSITIVITY:\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eBALANCE INPUT: 600mV (250W x 2ch)\u003c\/li\u003e\n\u003cli\u003eUNBALANCED (Lline 1,2,3) INPUT: 600mV ( 250W x 2ch)\u003c\/li\u003e\n\u003cli\u003ePHONO (MM\/MC) INPUT: 5mV \/ 0.5mV (250W x 2ch )\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cstrong\u003eIMPEDANCE INPUT:\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eBALANCE INPUT: 44kΩ\u003c\/li\u003e\n\u003cli\u003eUNBALANCE (Line 1,2,3) INPUT: 47kΩ\u003c\/li\u003e\n\u003cli\u003ePHONO (MM\/MC) INPUT:  47kΩ\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cstrong\u003eIMPEDANCE OUTPUT:\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eSPEAKER OUTPUT: 53MΩ ( 200W X 4ch )\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cstrong\u003eBANDWIDTH (0dBr+\/-3dB\/8Ω):\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eSPEAKER OUTPUT: 20HZ - 20KHZ ( 250W X 2ch )\u003c\/li\u003e\n\u003cli\u003eH\/F SPEAKER OUTPUT: 10HZ - 66KHZ ( 250W X 2ch )\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cstrong\u003eTOTAL HARMONIC DISTORTION:\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eBALANCED \u0026amp; UNBALANCED (Line 1,2,3) INPUT: 0.007%(125W) ( 250W X 2ch)\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cstrong\u003eSIGNAL TO NOISE RATIO:\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eBALANCED, UNBALANCED \/ PHONO MM: 103dB \/ 109dB \/ 85dB (MM) ( 250W x 2ch )\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cstrong\u003eDAMPING FACTOR:\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eSPEAKER \u0026amp; H\/F SPEAKER OUTPUT: \u0026gt;250 ( 250W X 2ch )\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cstrong\u003eTONE CONTROL WITH ON\/OFF SWITCH:\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eBASS (100Hz) \/ TREBLE (10KHz):+\/-15dB ( 1W x 2ch [Speaker Output] )\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cstrong\u003eAUDIO IN\/OUT SETTING:\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eTRIGGER: 3.3 V ~12V\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"HiFi Rose","offers":[{"title":"Silver","offer_id":44757883420926,"sku":null,"price":4829.0,"currency_code":"AUD","in_stock":true},{"title":"Black","offer_id":44757888401662,"sku":"","price":4829.0,"currency_code":"AUD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0003\/3275\/9084\/files\/hifi-rose-ra280-integrated-amplifier-black-252.webp?v=1756479434","url":"https:\/\/skyfiaudio.com\/en-au\/products\/hifi-rose-ra280-integrated-amplifier-with-phono-250w-x2","provider":"SkyFi Audio","version":"1.0","type":"link"}