ROSE RA280 Master Integrated Amplifier User Guide

ROSE RA280 Master Integrated Amplifier

Top-notch Master Integrated Amplifier RA280

• Class AD Amplifier with next-generation GaN FET
• LC filter independently developed by HiFi ROSE
• Highly efficient and stable power supply
• Powerful 250W output
• Phono Amplifier for MM
• Control Volume for Bass/Treble

Analog Out

Stereo

| Sub Woofer

250W x 2ch (4Ω, 8Ω)

Speaker Output|  |

Design 430355110 mm / 9.5 kg / Solid Aluminum, Rust-proof Steel / Color: Black, Silver

Ultimate Network Transport RS130

• High-precision OCXO clock for Long-Term Jitter Reduction
• Fiber Optic Ethernet and Fiber Optic USB connectivity
• Network Streaming with SSD Caching Playback
• External master clock input
• Minimize electrical noise with full linear power configuration using a supercapacitor

Hi-Res|  |  |  |  |  |
---|---|---|---|---|---|---
PDCSMD| OPTN3a2tbivietO/D76S8Dkx5H11z,2 ES/

x 1, C AX      A

| In/Out Port

CNonentwecotriokn

| HDMI Out

Ethernet

| 10(/S1F0P0/C1O0P4K RASTEyp-Tex) 1

802.11a 00PEBalband

c Du

|
InP/out t| Digital Out| EB USxB1,TIy2pSe-H-AD2M.0I x 1|
Wi-Fi| USB Wi(rDeloensgslLeA) N Card|
USB Audio Out EXT. Clock| (Isolation)|
Input| 50Ω, 75Ω| Bluetooth| V4.2 (USB Dongle)|

Connectivity Bluetooth, DLNA, Airplay, Spotify Connect, Roon Ready
Design 430317125 mm / 12 kg / 15.4” Wide viewing angle touch screen / Color: Black, Silver

Advanced All-In-One Network Streamer RS520

• Reference Grade All-in-One Network Streamer
• Network Streamer + DAC + Class AD Amplifier with next-generation GaN FET
• High-Resolution Music Playback available(DSD512, PCM32bit/768kHz)
• A Femto Clock provides Ultra Precision
• The Special Linear Power Supply Configuration minimizes electrical noise

Connectivity Bluetooth, DLNA, Airplay, Spotify Connect, Roon Ready
Design 346328127 mm / 8.1 kg / 12.6” Wide viewing angle touch screen / Color: Black, Silver

Integrated Amplifier
– With Gallium Nitride Amplifier built in RA180

• Class AD Amplifier with next-generation GaN FET
• Multi-Output Component
• Designed to play up to the Super Twitter Realm
• Balanced Power Supply
• Phono Amplifier with Variable EQ

InP/out t|  |
---|---|---
SAAnnaaleolog(gOInuBt)

ter o A/

| Line1, Line2, Line3(BySpuabssW),oBoaflearnced, Phono(MM/MC)

4ch 200W(8Ω)

Speaker| Stereo(A), BTL(B)| Stereo(A): 4ch 200W(8Ω) / BTL(B) : 2ch 400W(8Ω)
BTL(A/B)| BTL(A) : 2ch 400W(8Ω) / BTL(B) : 2ch 400W(8Ω)
 |

Design 430391124 mm / 16.7 kg / Solid Aluminum, Rust-proof Steel / Color: Silver

High Performance Network Streamer RS150 Series

• Flagship Network Streamer
• Network Streamer + DAC
• High-tech DAC design for pure sound with low noise and low distortion
• High-Resolution Music Playback available(DSD512, PCM32bit/768kHz)
• A Femto Clock provides Ultra Precision
• The Special Linear Power Supply Configuration minimizes electrical noise

Connectivity Bluetooth, DLNA, Airplay, Spotify Connect, Roon Ready
Design 430318124 mm / 11 kg / 14.9” Wide viewing angle touch screen / Color: Black, Silver

Complete HiFi Network Streamer RS250A

• Reference Grade All-in-One Network Streamer
• Network Streamer + DAC
• High-Resolution Music Playback available(DSD512, PCM32bit/768kHz)
• A Femto Clock provides Ultra Precision
• The Special Linear Power Supply Configuration minimizes electrical noise

Hi-Res|  |  | InP/out t|  |
---|---|---|---|---|---
DiPDCSMD In

gital

| N3a2tbiviet/D76S8Dk5H1z2| HUeaSdBpAhuodnieo OInut

USB Audio Out

| USB3BA.5Tmypme 32.0

Type

InP/oOrut t| Digital Out| Optical, Coaxial| Ethernet| 10/100/1000 BASE-T
Analog In| Line In| CNonentwecotriokn|  | 80 11 a/b/g/n/ac
Analog Out| Pre-out_RCA| Wi-Fi

Bluetooth

| (V24.4.0G/HVz3/.50G+HzS)
HDMI Out| 4K
 |  |  |

Connectivity Bluetooth, DLNA, Airplay, Spotify Connect, Roon Ready
Design 27823183 mm / 3.2 kg / 8.8” Wide viewing angle touch screen / Color: Black, Silver

HiFi Network Streamer RS201 Series

• Reference Grade All-in-One Network Streamer
• Network Streamer + DAC + AMP
• Built-in High-Performance Power Amplifier(50W*2ch)
• High-Resolution Music Playback available(DSD256, PCM32bit/384kHz)
• A Femto Clock provides High Precision
• Digital equipment, PreAmplifier connection available
• Awarded the world’s three major design awards(Reddot, GOOD DESIGN, PIN-UP)

Connectivity Bluetooth, DLNA, Airplay, Spotify Connect, Roon Ready
Design 27823185 mm / 2.3 kg / 8.8” Wide viewing angle touch screen / Color: Silver

Hi-Res|  |  | InP/out t|  |
---|---|---|---|---|---
DiPDCSMD In

digital

| N3a2tbiviet/D38S4Dk2H5z6| HeaUdpSBhoOnuetOut

AMP

| US5B0WA 3TX.y5pmem3(.40Ω/ 2) .0

2CH

InP/out t| Digital Out| Optical| AMP| Ethernet| 10/100/1000 BASE-T
Analog In| Line In| CNonentwecotriokn|  | 80 11 a/b/g/n/ac
Analog Out| Pre-out_RCA| Wi-Fi

Bluetooth

| (V24.4.0G/HVz3/5.0G+HHzS)
HDMI Out| 4K
 |  |  |

HiFi Media Player RS301

• High-end All-in-One Speaker
• Network Streamer + DAC + AMP + SPEAKER
• 3-Way full-range speaker configuration
• High-Resolution Music Playback available(DSD256, PCM32bit/384kHz)
• Powerful sound playback with dual passive woofer engine design(Patented technology)
• Awarded the world’s three major design awards(Reddot, PIN-UP, iF)

Connectivity Ethernet, Wi-Fi, Bluetooth, DLNA, Airplay
Rear Micro USB, USB A Type, USB B Type, Micro SD, Headphone, AUX Design 360122119 mm / 1.9 kg / 5” IPS touch panel / Color: Silver

Premium Media Player RS350

• Casual All-in-One Speaker
• Network Streamer + DAC + AMP + SPEAKER
• 3-Way full-range speaker configuration
• Playback of various file formats available(Music, Video, Image)
• Powerful sound playback with dual passive woofer engine design(Patented technology)

Connectivity Wi-Fi, Bluetooth, DLNA, Airplay
Rear Micro USB, USB A Type, Micro SD, Headphone
Design 364123123 mm / 1.5 kg / 5” IPS touch panel / Color: White

HiFi ROSE USB Fiber Optical Hub RSA720

• Compact Design Maximizing Usability and Functionality
• Adopted an Optical USB Port
• Supports USB 3.0/2.0 via Four Independent USB Ports
• Guaranteed Stable Data Transmission Speed
• Long-Distance Transmission Available

Input USB 3.0 B-Type, SFP(10G)
Output USB 3.0-2ports, USB 2.0-2ports
Design 152153.533.5 mm / 1.2 kg / Color: Silver

HiFi ROSE CD Drive RSA780 Series

• USB-isolator Adopted to block motion noise
• USB-B Type Port Adopted for HiFi Audio
• 900g weight for CD playback without external shaking
• Minimized Motion Noise by applying Insulators
• Provides CD Ripping Features

Rear USB B Type
Design 15215225 mm / 0.9 kg / Color: Silver

Innovative ROSE OS System

ROSE Connect Remote Application
A dedicated Remote App is provided that allows users to conveniently control and smartly manage their ROSE device. The Remote App is supported on various platforms, including the iPhone, iPad, Android phone, and PCs.

Control
You can freely and conveniently control various HiFi ROSE functions wirelessly. Control You can control a variety of functions remotely including Music, ROSE Tube, TIDAL,

Remote Search

ROSE Connect includes the remote control function. You can conveniently search for a variety of music in the Media Library

Streaming

You can simply and easily play music stored on your phone on your ROSE device. Enjoy a lossless, high-quality streaming service.

Playlist

You can create your playlist. Make a playlist on Music and ROSE Tube and check it out at Home – My Music.

Share with Friends
You can share your playlists with your friends or listen to music recommended by them. Communicate with your friends through music.

Media Library
Scan the music in your local memory to organize it into various categories.

Safety Precautions

Warnings

• Do not apply excessive force to the product, throw it, or strike it with sharp objects.
• When children use the product, parents must instruct them on how to use it correctly and make sure they do so.
• Use within a temperature range of 0 °C – 40 °C and do not use in hot or humid conditions. Install the product in a well-ventilated area, not an enclosed space, as product failure, corrosion, heat, or ignition may occur in an environment below 0 °C or in a sealed environment with a high temperature, such as a dry sauna. Moisture or liquid can also damage the surface of the product and its circuit components.
• Be sure to use a genuine power cable provided by ROSE. Any other cable may cause operational errors or damage (degradation of performance) to the product.
• Do not spill dirt or liquid on the product. It may damage the components and circuits. If the product gets wet, do not turn it on. Contact your nearest service centre. However, free repairs are not available in this case.
• Do not connect accessories not guaranteed by ROSE to the product, and do not place the product on any object that may interfere with radio waves (metal desk, microwave, etc)
• Because the product is sensitive to radio waves, using it near steel or electromagnetic devices can lead to poor performance.

Precautions

• The contents of the owner’s manual are described based on the default settings of the product.
• This product may be changed without prior notice to the user in order to improve product performance.
• The features and additional services of the product may vary depending on the country, software specifications, and policy changes of the service provider.
• The Wi-Fi connection may be slow due to signal interference.
• Do not use chemical solutions (alcohol, thinners, solvents, etc) or detergent to clean the product. Rubbing the product with a chemical solution can create heat and cause the product to catch fire. When cleaning the product, wipe it with a soft cloth or dry towel.
• Do not disassemble, modify or repair the product on your own. If you do, you will no longer qualify for free repairs. If a malfunction occurs because of this, contact an authorized service centre for repairs.
• Install the product close to an outlet so that it is easy to remove the plug from the outlet.
• To completely disconnect the product from the AC main power source, unplug the power supply cord from the AC outlet.
• Do not use the product near water. Do not expose the product to a dripping or splashing environment and do not place objects containing liquids, such as vases, on the device.
• Do not block the ventilation openings. Install this product according to the product installation and orientation instructions.
• Unplug the product during lightning storms or when unused for long periods of time.
• Precautions for Child Protection
  • If one of the coin batteries inside the remote control is swallowed, it may cause serious burns or death within two hours.
  • Store new and used batteries out of the reach of children.

Caution

• Precautions for High-Temperature Parts During Set Operation
  • These parts are for discharging the high temperature inside the set to the outside, and they may cause burns during the set operation. Be sure to turn off the power and wait for 30 minutes.
  • Never cover the top of the main body, including the ventilation openings, with cloth and always leave them open.

Caution

Precautions for Electric Shock Caused by the Set

• When the volume is high, the speaker output is high, and high voltage and high current power flows. Be sure to turn off the power when touching or connecting.
• Do not touch with wet hands while the power is on.

Components List

Location / Function of Buttons and Ports

Front Side of the Product

Rear Side of the Product

Remote Control

How to install the Product

Product Design Method and Recommended Installation

• This product is designed to be used on a table or shelf.
• This product can malfunction during cold weather or hot weather. (Operating temperature: 0 to 40℃, Storage temperature: -10 to 50℃)
• If the space where the product is installed is small, provide adequate ventilation for the product. A longer operating life is ensured when electronics are properly ventilated and maintained so that they do not overheat more than necessary. Do not install this product directly on a device that generates a lot of heat, such as a power amplifier.
• The figure below shows the minimum ventilation requirements required for the product.
• Keep at least 25mm apart on each side of this product to prevent airflow from clogging.
• Secure a depth of 40cm for airflow and cabling.

How to Connect the Power Cord

• This product includes a removable power cord. Please connect the powercord after connecting all audio cables.

Caution : When disconnecting the power cord, always disconnect the power outlet first with the power switch off. The non-operating voltage range is 140 – 179 V (Blank rating).

How to Properly Connect the Rear Ports and Cables

Connecting the Analog Input Port to the Source Device

•  As shown in the figure below, you can connect the analog output port of the source device to the analog audio input(Balanced/Line 1, 2, 3) of this product.
• For the analog audio input sensitivity of Lines 1, 2, and 3 this product, export a maximum output of stereo 250W(4Ω, 8Ω) at up to 300mVrms(-8.239 dBu).
• For the balanced analog audio input sensitivity of this product, export a maximum output of stereo 250W(4Ω, 8Ω) at up to 600mVrms(-2.218 dBu).
• After connecting the cables, connect the power cable. There may be a risk of electric shock.

Caution : Before connecting this product to a source device, set the volume of the product to mute or below level 5, and then connect it using an RCA cable. If you connect the cable while the volume of the product is turned up, a loud shock noise may occur.

• The XLR jack connection configuration polarity is shown below

Connecting the Phono(MM) Input Port to an Audio Device

• You can connect the analog output of the turntable to the phono analog audio input (PHONO IN) of this unit, as shown in the following figure.
• When using the phono audio input as the source, you need to switch the input source to “PHONO” in the input settings. Input settings can be changed by remote control or manually.
• The input sensitivity is 5mV (-43dBu), and the maximum output is 250W(4Ω, 8Ω) for stereo.
• If the input source of this product is set to “PHONO” and the volume is suddenly increased without a turntable connected, a humming noise may be heard from the speaker.
• The phono GND (signal GND) terminal on the rear side of this product cannot be used for power grounding. When a lot of noise is generated, you can reduce the noise by connecting this GND terminal to the signal GND of an external phono device.
• Conversely, connecting some turntables to the signal GND terminal may increase noise, which may be counterproductive. In this case, please remove the signal GND connection line between devices

Sub Woofer Output

• As shown in the figure below, you can connect an active sub woofer device to the subwoofer analog audio output of this product.
• The subwoofer output level of this product is up to 1 Vrms (2.218 ㏈u).

Trigger Input Terminal and Pin out

• The trigger function can control the power by linking the product and the source device.
• It you are using a source device with a trigger output terminal, you can use it as a trigger tunction to control the power on and off by connecting it to the trigger input terminal of the product with a monaural mini-plug cable.

Mobile Wi-Fi Setting

Search Screen

This is the screen that appears when you run AMP connect for the first time. You can search for amplifiers connected to the Wi-Fi network to which the device is currently connected.

Search Screen (No Search Results)

If there is no amplifier connected to the Wi-Fi network that the device is currently connected to, a message saying that no amplifier was found will appear.

• You can search for the amplifier again by tapping the Refresh button at the top right.
• You can use the IP address connection function by tapping the IP Connection button.
• You can use the device registration function through Device Registration.

IP Connection Screen

You can use the app by directly entering and registering the IP address to which the amplifier is connected by tapping the IP Connection button.

Device Registration

• Amplifier Connection Standby Status Information Screen
  When you turn on the power of the amplifier to be connected and press and release the Power button for five seconds, the backlight LED around the volume blinks and the amplifier enters the connection standby state. The amplifier appears in the Wi-Fi list as ROSEAMP_XXXXXX.

Device Amplifier Connection Information Screen

This is the device registration information screen. Please read the instructions carefully and pay attention to the screen.

Amplifier Registration Screen

When you press the Next button on the last screen of 4-3-1, you will see the name of your amplifier labeled ROSEAMP_XXXXXX in the Wi-Fi list. When you select this amplifier, the status will change to ‘Connected’. Afterwards, when you press the Back button on the device to return to the AMP Connect app, the status information in the center changes to ‘Connect’ and becomes activated. Please tap the activated Connect button.

Amplifier Network Connection Screen

The following screen displays the connection status between the amplifier and the network. You can connect to Wi-Fi for use here.

• The amplifier does not support dual band Wi-Fi and only supports 2.4GHz networks. Therefore, the amplifier will not connect to 5GHz networks.

Amplifier Network Confirmation Screen

This screen is for checking the network connection status of the amplifier.

• Check the Wi-Fi credentials of the amplifier.
• Check the Wi-Fi connection of the amplifier.
• Check the network status of the amplifier.

Amplifier Search Screen

Once you complete the device registration settings, move to the amplifier search screen on the first screen and search for the ROSE amplifier connected to the network that is connected to the device.

Amplifier Control Screen

When you select the RA280 amplifier from the search result list, a control screen will appear.

• Search( ) : Takes you to the screen to search for amplifiers connected to the network that is connected to the device.
• Search( ) : Retrieves the information of the connected amplifier(s).
• Power( ) : Turns the amplifier power on/off. The picture on the left shows the amplifier power on, and the picture on the right shows the amplifier power off. When the amplifier is turned off, the current volume and amplifier status information are not displayed.
• Settings( ) : Shows the detailed settings of the amplifier (See additional description in section 4-6-1).
• Notice( ) : The volume of RA280 is displayed in dB units. When you press the button, the following message is displayed ‘Due to the nature of the analog volume (potentiometer) controller, there may be an error in the displayed dB value.’
• Volume : You can view the volume value of the amplifier and adjust the volume of the amplifier using the +/- buttons (The volume cannot be adjusted using the status bar).
• Mute( ) : Mutes or unmutes the amplifier volume.
• Current status information : From the top, shows the amplifier’s source information (input selector) and tone control bypass and dimmer status information.

Amplifier Status Information Check

Amplifier Detailed Settings Screen

You can view the detailed settings of the amplifier.

FW Detailed Information Screen

You can view the firmware (FW) details of the amplifier.

Detailed IP Information

You can view detailed information of the network to which the amplifier is connected.

Current Status

You can see the status of the current amplifier’s auxiliary functions. From the top, it shows information about the amplifier’s tone control bypass and dimmer status.

Standby Mode Settings

• Low power : Deactivates the Wi-Fi function when the amplifier is powered off. After turning on the low power function, you can only turn on the power using the power switch or remote control. (You cannot turn on the power by operating the mobile app) This function is intended to minimize power consumption. When Wi-Fi is disabled and the power is turned off, power consumption is less than 0.5W.
• General : Activates the Wi-Fi function when the amplifier is powered off. After switching to normal mode, you can turn the power on/off using the mobile app. This function has the convenience of allowing you to freely turn the power on and off using the mobile app, but the power consumption when turning it off is approximately 1.2 W, which is slightly more than the low power standby mode.

Automatic Shutdown Settings

You can turn the automatic shutdown function on/off or set the time.

• OFF : Disables the automatic shutdown function.
• ON : Enables the automatic shutdown function. If there is no input signal for more than the set time, the amplifier will automatically shut down.

Product Specifications

Specifications

Weight

| 430(W) X 355(D) X 103(H)

9.5kg

|
Body| Solid Aluminum, Rust-proof Steel|
4Ω|  |
AOmuptlpifiuet **r Sub Woofer| 8Ω| 250W x 2ch (500W)|
 |
Output| Mono**

Balance Input

| 1Vrms (2.218 dBu)

600mV

| 250W x 2ch
SenInspituivtity| Unbalance Input| 300mV| 250W x 2ch
Phono(MM) Input| 5mV| 250W x 2ch
Balance Input|  |
ImpInepduatnce Bandwidth| Unbalance Input| 47kΩ|
Phono(MM) Input|
 |
(0dBr±3dB/8Ω)

Fr quency

| Speaker Output| 12Hz ~ 83kHz| 250W x 2ch
(1WR, e 0s±p3odnBse/8Ω) THD| Speaker Output| 10Hz ~ 85kHz| 1W x 2ch
(T o D t a i s l t H o r a t r i m o n o ) nic

Damping Factor

| Balan c e I & n p U u n t b alan c e

Speaker Output

| 0.007% (@125W)

250

| 250W x 2ch

250W x 2ch

S / N|  |  |
N(oSiisgenRaal **tioo) Output| Bala n / c P e h d o / n U o n ( M b a M l a ) ****nced| 109dB / 109dB / 85dB| 250W x 2ch
Impedance| Speaker Output**

Bass(100Hz)

| 30mΩ| 250W x 2ch

1W x 2ch

Tone Control| / Treble(10kHz) Turnover| ±15dB

500Hz (+13dB@100Hz)

| (Speaker Output) RIAA
Phono(MM)| Roll- off| 2.1kHz (-13.7dB@10kHz)| RIAA
Output Power| 500W (SMPS)| Max. 600W
Power|  |  | Standby Mode
Input Voltage| AC100-240V, 50/60Hz

Voltage can be turned on

| Power C<o0n.5sWumption
AuodnioRInea/Or **ut| Trigger In Trigger Out**| Voltage c 3.3V~12V     on 12V

an be turned

|
 | 38kHz Infrared Ray|
Remote Control| IR Input| (Within 1D0ismtaonfcOe)perating|

Appendix

Bass Control Function of the Preamplifier

• If you turn on the tone control switch on the front side of this product and turn the BASS knob left or right, the level of the bass band (based on 100 Hz) will increase or decrease, as shown in the following figure.
• It can be adjusted from -15dB (attenuation) to +15dB (increase) in 100Hz/0dB increments.

Treble Control Function of the Preamplifier

• If you turn on the tone control switch on the front side of this product and turn the TREBLE knob left or right, the level of the treble band (based on 10 liz) will increase or decrease, as shown in the figure.
• It can be adjusted from – 15dB (attenuation) to +15db (increase) in 10kHz/OdB increments.

Phono Equalizer Curve

The frequency characteristics of the phono amplifier of this product are as follows.

Quality Guaranteed

Place of Purchase

| Shop Name
Contact Address
Serial No.|
Contact Address|
Warranty Period| Until 1 year from the date of purchase

• Name of the Company that Received the Conformity Assessment: CITECH Co., Ltd.
• Manufacturer/Country of Manufacture: CI TECH Co., Ltd. / Republic of Korea
• Identification Code of the Certified Company: SYH
• Certification No.: R-R-SYH-RA280

Product Website: www.hifirose.com

• Get news about the latest events and new product information from ROSE through the newsletter.
• You can find an authorized dealer or reseller near you on the website.

Things to Check Before Contacting the Service Center

• If the switch does not work while the product is in use, it may be because it was exposed to severe static electricity. Please disconnect the power cord before starting again.
• When the product is used for a long time in a confined space that does not meet the product installation conditions (page 21), it may generate heat and become hot, affecting the life and performance of the product. Always keep the ventilation openings on the top of the main body open so that heat dissipation inside is not disturbed.
• If the transmission is unstable or a transmission or reception failure occurs due to the nature of wireless Wi-Fi communication when using the mobile app, please move to another location and try to reconnect.
• If there is no output sound, check the input source selector of the main unit, and check that the speaker connection status, and the volume control level are not “0.”
• If the remote control does not work, the battery may be empty. Replace it with a new battery.

Repair Service Guide

• Free Repair
  Limited to naturally occurring failures within one year from the date of purchase, which is the warranty period of the product.

•  Paid Repair
  If the warranty period has expired, or even if it is within the warranty period, in the following cases, the actual cost of repair (including part costs) will be charged.

  • Failure due to consumer negligence during use
  • Repairs or modifications made by persons other than company engineers
  • Failure or damage caused by an abnormality in the power supply
  • Failure due to a natural disaster

• Repair Service Application Guide
  If a failure occurs during use, stop using it immediately and consult with the place of purchase or the customer support office of the company first.

• Information required for reporting

  • Model name and serial number (manufacture date)
  • Place and date of purchase
  • Consumer information including contact information and address
  • Symptoms of failure
  • All other matters necessary for repair service

• Precauti ons for Product Delivery to the Service Center
  Be sure to pack the product in the original box and inner protective material to prevent damage when delivering the product by courier. Please note that we are not responsible for damage to the product during transportation of the product in other packaging.

References

• HiFi ROSE

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