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Rose electronics RA280 Owner's Manual

Top-notch master integrated amplifier
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Beyond Audio, HiFi ROSE
Top-notch Master Integrated Amplifier RA280
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Summary of Contents for Rose electronics RA280

  • Page 1 Beyond Audio, HiFi ROSE Top-notch Master Integrated Amplifier RA280 - 1 -...
  • Page 2 Beyond Audio, HiFi ROSE - 2 -...
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  • Page 5 Products HiFi ROSE Top-notch Master Integrated Amplifier RA280 ▪Class AD Amplifier with Next-Generation GaN FET ▪Independently Developed LC Filter by HiFi ROSE ▪Highly Efficient and Stable Power Supply ▪Powerful 250W Output ▪Phono Amplifier for MM ▪Bass/Treble Control Volume Analog In...
  • Page 6 HiFi ROSE Products Advanced All-In-One Network Streamer RS520 ▪Reference Grade Network Streaming All-in-One ▪Network Transport + DAC + Class AD Amplifier with Next-Generation GaN FET ▪High-Resolution Music Playback (DSD512, PCM 32bit/768kHz) ▪Highly Precise Femto Clock ▪Linear Power Supply for Significant Noise Reduction Native DSD 512 HDMI Out Hi-Res...
  • Page 7 HiFi ROSE Products High Performance Network Streamer RS150B ▪Flagship Network Streamer ▪Network Transport + DAC ▪Advanced DAC Design for Pure Sound with Low Noise and Distortion ▪High-Resolution Music Playback (DSD512, PCM 32bit/768kHz) ▪Highly Precise Femto Clock ▪Linear Power Supply for Significant Noise Reduction Native DSD 512 Analog In Line In...
  • Page 8 HiFi ROSE Products 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) Native DSD 256 Headphone Out 3.5mm...
  • Page 9 HiFi ROSE Products 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 364*123*123 mm / 1.5 kg / 5”...
  • Page 10 HiFi ROSE Products HiFi ROSE CD Drive RSA780 Series ▪USB Isolator Adopted to Block Motion Noise ▪USB B-Type Port for HiFi Audio ▪900g Weight for Stable CD Playback ▪Minimized Motion Noise with Insulators ▪CD Ripping Features Included Rear USB Type-B Design 152*152*25 mm / 0.9 kg / Color: Silver - 10 -...
  • Page 11 HiFi ROSE OS System Innovative ROSE OS System TIDAL Qobuz Enjoy music streaming and videos Enjoy music streaming with with TIDAL’s unique features. Qobuz’s various functions. Support for Supports MQA Full Decoder, so you Hi-Res Audio(24bit/192kHz) means can enjoy high-resolution music. you can enjoy high-resolution music.
  • Page 12 HiFi ROSE Remote App 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.
  • Page 13 OWNER’S MANUAL RA280 Product User Manual - 13 -...

  • Page 14: Table Of Contents

    Table of Contents Safety Precautions 1. Warnings 2. Precautions Components List Location / Function of Buttons and Ports 1. Front Side of the Product 2. Rear Side of the Product 3. Remote Control How to Install the Product 1. Product Design Method and Recommended Installation Location 2.
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  • Page 16: Safety Precautions

    Safety Precautions 1. 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. •...

  • Page 17: Components List

    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.

  • Page 18: Location / Function Of Buttons And Ports

    Location / Function of Buttons and Ports 1. Front Side of the Product Front LED Tone Control / Power Button Dimming Switch Bypass Selector / Status Display LED Remote Control Input Source Tone Control Receiver Selector VU Meter (Preamplifier) Main Volume Remote Control This is the optic receiver part that receives infrared signals from the remote Receiver...

  • Page 19: Rear Side Of The Product

    2. Rear Side of the Product Power Speaker Trigger (AC Input~) Output Circuit Sub Woofer Phono GND Output Breaker Balanced Line Input Input (Unbalanced) Phono(MM) Input Power This is the power input terminal connected to the AC power cable. (AC Input~) This is an electronic fuse that prevents damage to the set due to overvoltage or Circuit Breaker overcurrent.

  • Page 20: Remote Control

    3. Remote Control Power Mute Volume Down Volume Up Used to power the set on or off. Power Used to mute music. Mute Used to decrease the volume. Volume Down Used to increase the volume. Volume Up - 20 -...

  • Page 21: How To Install The Product

    How to install the Product 1. 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℃) •...

  • Page 22: How To Connect The Power Cord

    • This product includes a removable power cord. Please connect the power cord after connecting all audio cables. Concentric Plug RA280 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).

  • Page 23: How To Properly Connect The Rear Ports And Cables

    Concentric Plug 3-1. Connecting the Analog Input Port to the Source Device RA280 • 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.

  • Page 24: Connecting The Phono(Mm) Input Port To An Audio Device

    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. RA280 Turntable LINE OUT 3-3.

  • Page 25: Trigger Input Terminal And Pin Out

    3-4. Trigger Input Terminal and Pin out Concentric Plug RA280 • The trigger function can control the power by linking the product and the source device. • If you are using a source device with a trigger output terminal, you can use it as a trigger function to control the power on and off by connecting it to the trigger input terminal of the product with a monaural mini-plug cable.

  • Page 26: Mobile Wi-Fi Settings

    4. Mobile Wi-Fi Setting 4-1-1. Search Screen 4-1-2. Search Screen (No Search Results) This is the screen that appears when you run AMP connect for the first time. You can search If there is no amplifier connected to the Wi-Fi for amplifiers connected to the Wi-Fi network network that the device is currently connected to which the device is currently connected.

  • Page 27: Ip Connection Screen

    4-2. IP Connection Screen 4-3. Device Registration You can use the app by directly entering • Amplifier Connection Standby Status and registering the IP address to which the Information Screen amplifier is connected by tapping the IP When you turn on the power of the Connection button.
  • Page 28 4-3-1. Device Amplifier Connection Information Screen This is the device registration information screen. Please read the instructions carefully and pay attention to the screen. - 28 -...
  • Page 29 4-3-2. 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’.
  • Page 30 4-3-3. 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.
  • Page 31 4-3-4. 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. - 31 -...

  • Page 32: Amplifier Search Screen

    4-4. 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. - 32 -...

  • Page 33: Amplifier Control Screen

    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.’...

  • Page 34: Amplifier Status Information Check

    4-6. Amplifier Status Information Check 4-6-1. Amplifier Detailed Settings Screen You can view the detailed settings of the amplifier. FW details : Shows the current amplifier’s firmware version (See additional description in section 4-6-2) IP details : Shows the IP address of the current amplifier (See additional description in section 4-6-3) Current status : Shows the status of the...
  • Page 35 4-6-2. FW Detailed Information Screen 4-6-3. Detailed IP Information You can view the firmware (FW) details of the You can view detailed information of the amplifier. network to which the amplifier is connected. - 35 -...
  • Page 36 4-6-4. 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. - 36 -...
  • Page 37 4-6-5. 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.
  • Page 38 4-6-6. 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.

  • Page 39: Product Specifications

    Product Specifications 1. Specifications Measurement Item Condition Specifications Standard 430(W) X 355(D) X 103(H) Size 9.5kg Design Weight Solid Aluminum, Rust-proof Steel Body 4Ω 250W x 2ch (500W) Amplifier Output 8Ω Sub Woofer 1Vrms (2.218 dBu) Mono Output 600mV 250W x 2ch Balance Input 335mV 250W x 2ch...

  • Page 40: Appendix

    (based on 100 ㎐) will increase or decrease, as shown in the following figure. • It can be adjusted from -15dB (attenuation) to +15dB (increase) in 100Hz/0dB increments. Audio Precision Hifi ROSE RA280 RMS Level Pre Amplifier - Bass Pre Amplifier - Treble - 40 -...

  • Page 41: Treble Control Function Of The Preamplifier

    (based on 10 ㎑) will increase or decrease, as shown in the figure. • It can be adjusted from -15dB (attenuation) to +15dB (increase) in 10kHz/0dB increments. Audio Precision Hifi ROSE RA280 RMS Level Pre Amplifier - Bass Pre Amplifier - Treble - 41 -...

  • Page 42: Phono Equalizer Curve

    3. Phono Equalizer Curve • The frequency characteristics of the phono amplifier of this product are as follows. Audio Precision Hifi ROSE RA280 RMS Level - 42 -...
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  • Page 44: Quality Guaranteed

    • 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.
  • Page 45 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. •...
  • Page 46 Memo - 46 -...
  • Page 47 Memo - 47 -...
  • Page 48 Memo - 48 -...