HiFi Rose RS250A Streaming DAC Preamplifier

The RS250A is built around a first-class digital stage. Starting with the superior ES9028 PRO DAC chip and utilising an ultra-low phase noise oscillator, the streamer can support and convey the true quality of music formats up-to PCM 32 bit / 768kHz and Native DSD512 (22.5792MHz).

Technical Specifications:

• Base Operating System: Customised Android 7.1
• CPU: Hexa Core CPU, Dual-core Cortex-A72 up to 1.8GHz, Quad-core Cortex-A53 up to 1.4GHz 
• GPU: Mali-T864 GPU, OpenGL ES 1.1/2.0/3.0/3.1, OenVG1.1, OpenCL, DX11 
• Memory: LPDDR3 4GB
• Oscillator: High-Precision Femto Clock
• DAC Chip: ES9028 PRO 8-Channel Audio DAC
• Output Level: Max 2.2Vrms, Unbalanced 
• Signal to Noise ratio: 126dB (A-weighted)
• THD: 0.00012% (1kHz, 2.25Vrms, Unbalanced output)
• THD + N: 0.0002% (1kHz, 2.25Vrms, Unbalanced output)
• Dynamic Range: 137dB (CCITT filter)
• Stereo Cross Talk: > 137dB (20Hz – 20kHz)
• Frequency Response: 17Hz – 80kHz (± 1dB)
• Output Impedance: 150Ω
• Network Connectivity: Ethernet 10/100/1000 BASE-T, Wi-Fi (802.11 b/g/n/a/ac) 2.4Ghz/5Ghz Dual Band
• Bluetooth: Bluetooth supported (A2DP Sink, AVRCP v1.3)
• Streaming Service: Bluetooth A2DP Sink, Airplay, DLNA, Roon Ready, Spotify Connect
• Audio Inputs: Line Input x 1, Optical In x 1, COAX x 1, USB 2.0 Audio In x 1
• Audio Outputs: Analogue Out (Unbalanced RCA) x 1, Optical Out x 1, COAX x 1, USB 3.0 Audio Out x 1, Headphone Out x 1
• Video Outputs: HDMI 2.0 x 1 (up to 3840 x 2160 / 60Hz)
• Media Connections: USB 3.0 x 2 (File system-NTFS/exFAT/FAT32, up to 10TB), SATA 3.0, SSD x 1 (File system-NTFS/exFAT/FAT32, up to 4TB)
• Network Support Protocol: SMB / FTP / WebDAV
• Supported Audio Codecs: WAV, FLAC, ALAC, AIFF, WMA, MP3, OGG, APE, DFF, DSF, AAC, CDA, AMR, APE, EC3, E-EC3, MID, MPL, MP2, MPC, MPGA, M4A, PCM: 8kHz - 768kHz (8 / 16 / 24 / 32bit sample rate)
• Native DSD: DSD64 (2.8MHz) - DSD512 (22.4MHz)
• MQA: Full Decoding
• Supported Video Codec: ASF, AVI, MKV, MP4, WMV, MPEG-1, MPEG-2, MPEG-4, H.263, H.264, H.265, VC-1, VP9, VP8, MVC, H.264/AVC, Base/Main/High/High10 profile@level5.1 up to 4Kx2K@30fps, H.265/HEVC, Main/Main10 profile@ level 5.1 High-tier up to 4Kx2K@60fps 
• Display: 8.8-inch TFT LCD & Capacitive Touch Screen (MIPI-DSI)
• Size (W x D x H): 278 x 231 x 83 mm
• Weight: 3.2kg
• Power Consumption: 50W
• Accessories: Power Cord x 1, Bluetooth Remote Controller x 1, Manual x 1, SSD Screw x 4

We endeavour to despatch same day for orders placed up to 1pm on available stock items (items with stock message "Usually dispatched within 24 hours"). Please remember to check with us first for a physical stock check if next day delivery is important to you. Any items with stock message "Usually dispatched within 72 hours" are items that we do not hold in stock but order in from the importer or manufacturer as soon as a customer order is received. Occasionally these may be delayed beyond 72 hours due to importer/manufacturer stock levels but we will inform you as soon as we can if this is the case.

UK Orders

We despatch the bulk of our UK mainland items on a 24 hour service – Free of Charge. Non Mainland locations - Isle of Man, Isle of Wight, the Scilly Isles, the Scottish highlands and Islands, the Channel Islands and Northern Ireland may take a day or so longer and are not Free of Charge. Smaller items are delivered using Royal Mail 24 or special delivery. Larger items are delivered using a courier service such as DPD or UPS.

International Orders

Due to the nature of our products and brand restrictions we are only able to send certain items internationally. Smaller items are delivered using Royal Mail Small Packets Airmail with International Tracked and/or Signed depending on value of item and availability of the service. Larger International shipments are sent by insured and tracked services using UPS. If there are any delays due to specific customs regulations, etc, you will be contacted by Hifisound or by the courier with a request for any further information required. Customs duties can apply for shipments to any countries outside of the UK depending on where the product you have bought is made. Customers are responsible for all taxes and duties incurred when the items enter their country.

Collect in Store or Home Install

At the request of the manufacturer some items cannot be supplied by mail order but you can click and buy them and then elect to collect them from our store or arrange a home install (if applicable). Applicable items clearly state that they are Collect in store or home install. Once ordered you will receive a message prompting you to contact us by phone or email to arrange for us to deliver and install or to reserve and collect from our store at your convenience, you will also be advised of the delivery time / stock availability as not all Home install / collect in store items are held in stock.