Hi,
I am curious on how much component crossover exists within each of HiFi Rose products.
I mean the networking products have the same dongle options, interface, layouts, etc …
For example… what’s the difference between the RA180 and the RA280 and RS520 amplifiers?
Or the internal clocks in use?
Thx
You are correct, some common elements do exist across our product lineup, especially in terms of user interface, software framework, and networking components (such as Wi-Fi/Bluetooth dongle compatibility and ROSE OS design). This ensures a consistent and intuitive user experience across different models.
However, the internal hardware architecture — including amplification design, DACs, clocks, and power stages — is uniquely developed for each product class. Here’s a brief overview of the models you mentioned:
RA180 vs. RA280:
RA180 is our flagship integrated amplifier featuring a GaN-based Class AD amplifier, a dual mono architecture, and a bipolar power supply for ultra-high resolution and control. RA280, on the other hand, adopts a more conventional Class D design with simplified circuitry, making it more cost-efficient while still delivering excellent performance.
RS520 Amplifier Section:
The RS520 uses a high-performance Class AD amplifier similar in technology to the RA180 but in an all-in-one configuration. It shares some design philosophies but is optimized for integration with the streamer/DAC components in the unit.
Internal Clocks:
Products like the RS150B and RA180 use high-precision femto clocks for ultra-low jitter performance, especially important for digital-to-analog conversion. Other models, like RS520 and RS250, use high-quality but cost-optimized clocking solutions suitable for their integrated design goals.
Thank you for the response.
Its kind of what I was looking for…
Kind of wished for more detail in terms of the actual differences.
For example you call out the differences in the clocks between the RS520 aand the RS150B and RA180.
But could you provide more detail in terms of the amp and DAC chips.
BTW while I know that you’re pushing the Class AD which is pure marketing… Its really just a GanFET class D amp. I understand the desire to differentiate between the different levels of Class D GanFETs, but today there is AGD, Orchard Audio, and VTV among others which offer the same level and roughly at the same price points.
IMHO having clear technical descriptions will help to differentiate your products from the lower cost alternatives. For example you would need to buy the Eversolo A10 and F10 (separates) to have a similar level of product found in the RS520 in terms of sound quality. WiFi/BT and the addition of PEQ and room correction are advantages in the Eversolo and WiiM product lines, which I suspect you could include w a firmware upgrade and dongle upgrade.
Thx
RS150B
DAC Chip: ESS ES9038PRO (Flagship DAC)
Key Features:
8-channel 32-bit reference DAC
Ultra-low THD+N (up to –122dB), SNR over 140dB
Dual-mono implementation
Sound Characteristics:
Highly detailed, analytical, and transparent
Clean treble, accurate imaging, and deep soundstage
Notes:
This is HiFi ROSE’s flagship DAC-integrated streamer, delivering true high-end performance for discerning audiophiles.
RS520
DAC Chip: ESS ES9038Q2M (integrated with Class AD amplifier)
Key Features:
Compact, power-efficient version of the ES9038
Integrated with ROSE’s proprietary Class AD amplifier
Designed for synergy between DAC and amplification stages
Sound Characteristics:
Balanced, natural, and musical
Excellent dynamics with warm tonality
Notes:
A true all-in-one device combining streamer, DAC, and amplifier, ideal for those who want simplicity without compromising quality.
RS250A
DAC Chip: ESS ES9028Q2M
Key Features:
Mid-to-high level DAC chip
Excellent SNR and THD performance
Cost-effective version of the 9038 series
Sound Characteristics:
Smooth, clean, with sufficient resolution
Slightly more relaxed than the RS150B
Notes:
A great balance of performance and affordability, suitable for serious listeners who may not need flagship-level specs.
RS130
DAC Chip: None (Digital Transport only)
Key Features:
No built-in DAC – designed as a pure digital transport
High-end OCXO clock for ultra-low jitter
Supports optical USB output, AES/EBU, and other digital formats
Sound Characteristics:
Depends entirely on the external DAC connected
Notes:
The RS130 is meant to be paired with a high-end external DAC.
Its job is to deliver the purest possible digital signal, with precision timing and low noise.