ROSE HIFI RA280 Amplifier Silver

ROSE HIFI RA280 Class AD Amplifier 2x250W 4Ω/8Ω Silver New
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.

No customer reviews yet, login to write a review.

By buying this product you get 344 loyalty points


Yes, notify me when available !
Reference : 19809
New product

3 449,00 €tax incl.

2 874,17 € tax excl.
Including 0,05 € for green tax

- +

 
Available on order
Livraions depuis la france
 
Livraison depuis la france Livraison depuis la france Livraison depuis la france

Livraison depuis la France
Facturation France
SAV France

2 Years warranty
 
More info

ROSE HIFI RA280 Class AD Amplifier 2x250W 4Ω/8Ω Silver

ROSE HIFI RA280 : 3/4 view

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.

Switching speed: Gallium Nitride FET VS Silicon FET


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.

ROSE HIFI RA280 : Tone control

Rose HiFi RA280: Dual mono amplification

The RA280 is designed with two separate amplifier modules that function as a mono amplifier, supporting 250 W (4 Ω and 8 Ω) for the left and right amplifiers respectively, producing 500 W on one stereo channel. The RA280 uses two-stage analogue filter technology designed by HiFi ROSE to achieve the best possible sound quality. HIFI ROSE's LC filter provides excellent frequency response by offering -1dB attenuation in the frequency band up to 65kHz and -3dB attenuation in the range up to 85kHz. This technology significantly reduces the inherent carrier noise caused by switching in Class D amplifiers, providing furthermore clearer and crisper sound quality in all bands. Soundstage and resolution have been greatly enhanced, creating a modern sound with an analogue twist.

ROSE HIFI RA280 : Dual mono amplifier
ROSE HIFI RA280 : Power supply

Rose HiFi RA280: State-of-the-art power supply

The RA280 also makes active use of the latest technologies when it comes to its power supply, thanks to a circuit developed in-house by HiFi Rose. This circuit is based on silicon carbide FETs instead of silicon FETs. The silicon carbide FET is a high-voltage, high-temperature-resistant power semiconductor device. It has a higher efficiency and generates less heat than a silicon FET, ensuring optimum power supply. Thanks to its innovative design of materials and structure, the RA280 delivers stable high power while minimising heat generation to provide the best sound quality. In addition, the RA280 applies a 2.5 kW power factor correction (PFC) circuit, also designed in-house by the brand, and introduces a high-capacitance capacitor to maintain excellent performance even in fast-load situations, giving a better response in terms of stability and reliability.

Rose HiFi RA280: Phono amplifier

In addition to its dual mono amplification stage, the Rose Hifi RA280 also features a phono preamplifier compatible with moving magnet (MM) cartridges. This means you can connect a turntable with compatible cartridge and take advantage of the high-precision compensation circuit developed by HiFi Rose to reproduce sound as close as possible to the original, ensuring rich, vibrant sound without distortion.

ROSE HIFI RA280 : Phono amplifier

ROSE HIFI RA280 : Numbered diagram
1Front LED dimming
2Tone control bypass control
3On/off button
4Remote control receiver
5Source selector
6Tone control
7Volume control
8AC power supply input
9Circuit Breaker
10Speaker outputs
11Subwoofer output
12Trigger IN/OUT
13Phono GND
14GND
15XLR input
16Phono input
17Line-in inputs

Technical characteristics

Specifications
Product typeIntegrated amplifier
Phono preamplifiers
Output power2x250W @ 4Ω
2x250W @ 8Ω
Subwoofer output level1Vrms (2.218 dBu)
Input sensitivityBalanced input: 600mV
Single-ended input: 600mV
Phono input :5mV
Input impedance47kΩ
Bandwidth20Hz - 20kHz: ±0dB
10Hz - 66kHz: -1dB
10Hz - 85kHz: -1dB
Frequency response20Hz - 20kHz: ±0dB
10Hz - 66kHz: -1dB
10Hz - 85kHz: -1dB
Total harmonic distortion (THD)0.007% @ 125W
Damping factor> 250
Signal-to-noise ratioBalanced input: 109dB
Single-ended input: 109dB
Phono input: 85dB
Output impedance30mΩ
Tone controlBass: ±15dB
Treble: ±15dB
Phono (MM)Turnover : 500Hz (+13dB@100Hz)
Roll-off : 2.1kHz (-13.7dB@10kHz)
TriggerInput: 3.3V - 12V
Output: 12V
Remote controlIR : 38kHz infrared ray
General
Power supply100V - 240V AC 50/60Hz
Dimensions430 x 355 x 103mm
Weight9.5kg
Housing materialAluminium
ColorSilver
Package1x Rose RA280
1x Remote control
1x Power cable
 
Data sheet
InputXLR
InputRCA
InputPhono
OutputSpeaker terminal
OutputSubwoofer
ColorSilver
Channel2 (Stereo)
ClassClass AD
Amplifier chipTransistors
Power (W)250.0
Remote ControlYes
 
Delivery

We deliver all over France, and internationally.
To find out the amount of shipping costs, simply go to your cart once you have added the desired products.
To discover our different services and delivery options, click on the following logos :

Only registered users can post a review. Log in or create an account .

No reviews at this time.

 
ROSE HIFI RA280 Amplifier Class AD 2x250W 4Ω/8Ω Silver
With the RA280, Rose HiFi is offering an integrated amplifier capable of producing a power of 2x250W under 4Ω and 8Ω and...

Write a review !


*



No products

To be determined Shipping
0,00 € Tax
0,00 € Total

Prices are tax included

Check my cart