FREE DELIVERY FOR LOCAL ORDERS ABOVE $300
Pre-order only.
1 Year Local Warranty.
Any mention of "us," "we," "our," etc is by HiFi ROSE, not AV One.
The 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 analogue technologies with excellent linearity achieved through strong power damping and short dead time.
The RA280 offers a special listening experience that lets you feel the true essence of music.
The 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. The RA280 provides high quality in terms of overall solid finish and functionality, while at the same time achieving harmony between the interior and exterior though a design that focuses on acoustic aspects. The sturdy aluminium chassis at the top, matte finish, and elaborate arrangement of grooves satisfy both functionality and progressive exterior design. Additionally, the front buttons and control panel embody vintage elegance and sophistication. The RA280 will make your space even more classy by adding the pure beauty of a perfectly blended interior and exterior design.
In 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, and have achieved significant improvements in signal-to-noise ratio (S/N) and total harmonic distortion (THD). However, despite these advantages, evaluation shows a lack of sound quality compared to analogue 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. It achieved sound quality comparable to analogue while maintaining the efficiency and power amplification of existing Class D amplifiers.
Class 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). It 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. This 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 analogue amplifier.
The 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). The 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.
More information is available on HiFi ROSE official website.
SHOWROOMS
The Adelphi
1 Coleman Street, #01–01/10/21/22, #02-29/30/31, Singapore 179803
T: +65 6337 0080
Mon-Sat: 11:00 am – 8:00 pm
Public Holidays: 1:00 pm – 6:00 pm
Sunday: Closed
Focal Powered by Naim (managed by AV One)
Millenia Walk
9 Raffles Boulevard, #01–35, Singapore 039596
T: +65 8611 0888
Mon-Sun: 11:00 am – 8:00 pm
Public Holidays: 11:00 am – 8:00 pm
For Commercial Application: karlung@av1group.com.sg
SERVICE CENTRE (by Appointment Only)
7 Kaki Bukit Rd 1, #01-03, Eunos Technolink Building, Singapore 415937
T: +65 6382 2288 | E: sales@av1group.com.sg
Mon-Sat: 10:00 am – 5:00 pm
Sunday & Public Holidays: Closed
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