HiFi Rose RSA720 Optical USB Hub at Vinyl Sound Buffalo, NY USA

The RSA720 is an optical USB hub from HiFi Rose (Seoul, South Korea), available at Vinyl Sound in Buffalo, New York, USA. Designed as a dedicated audio accessory for HiFi Rose network streamers, the RSA720 uses optical USB transmission technology to eliminate vibration and electrical noise from external USB storage devices before they can reach a connected streamer or DAC. Four independent USB ports provide simultaneous connection of multiple devices, while the SFP fiber optic port enables long-distance, electrically isolated data transmission well beyond the range of conventional USB cables. Compatible with all current HiFi Rose streamers including the RS130 Network Transport, the RSA720 includes a comprehensive accessory kit comprising SFP fiber modules, fiber optic LC cable, and USB cables for immediate installation.

Optical USB Technology for Noise-Free Audio

USB connections between storage devices and audio streamers carry not only data but also electrical noise generated by the storage medium's controller chips, spinning platters, or flash memory. This interference propagates along the USB power and data lines into the streamer's circuitry, potentially raising the noise floor and introducing jitter. The RSA720 converts the USB data stream to optical transmission using SFP (Small Form-factor Pluggable) fiber modules, creating a complete galvanic isolation barrier between the noise source and the streamer. The optical path is immune to ground loops and electrical interference, and supports extended transmission distances not achievable with copper USB cables. On the output side, four independent USB 2.0 Type-B ports allow multiple storage devices or a CD drive to be connected simultaneously, each isolated from the others by the RSA720's USB hub architecture.

Key Features

• Optical USB (SFP) Input: Fiber optic SFP port accepts the optical USB signal from an RS130 or other HiFi Rose streamer with SFP capability, providing galvanic isolation from network and streamer noise.
• Four Independent USB Ports: Four USB output ports allow simultaneous connection of multiple storage devices, CD drives, or other USB audio peripherals.
• Extended Transmission Range: Fiber optic transmission supports distances beyond the 5-meter limit of standard USB cables.
• Stable High-Speed Data: USB 3.0 10G SFP input and USB 2.0 outputs provide consistent data throughput for audio file transfer.
• Comprehensive Accessory Kit: Includes two SFP modules, one SFP LC fiber cable (1m), one USB 3.0 Type-B cable (1m), AC adapter, and power cord for a complete out-of-the-box installation.
• DC 12V Powered: Dedicated 12V DC power supply isolates the hub's power from the streamer's USB bus for additional noise reduction.

Technical Specifications

What's in the Box

• HiFi Rose RSA720 Optical USB Hub
• SFP fiber modules (x2)
• SFP LC fiber optic cable (1m)
• USB 3.0 Type-B cable (1m)
• AC adapter
• AC power cord
• User manual

Frequently Asked Questions

What is the HiFi Rose RSA720?

The HiFi Rose RSA720 is an optical USB hub from Seoul, South Korea, that uses SFP fiber optic transmission to create a galvanic isolation barrier between USB storage devices and a connected HiFi Rose streamer, eliminating electrical noise and extending the maximum USB cable distance. It provides four independent USB output ports and includes SFP modules and fiber cable. It is available at Vinyl Sound in Buffalo, New York, USA.

Which HiFi Rose products does the RSA720 connect to?

The RSA720 is designed primarily for use with the HiFi Rose RS130 Network Transport, which features a USB 3.0 Fiber SFP input specifically for this type of optical connection. The hub's conventional USB 3.0 Type-B input also allows connection to streamers without an SFP port, providing the four-port USB expansion benefit without the optical isolation.

Why does optical USB matter for audio quality?

Standard USB cables conduct both audio data and electrical noise from connected devices into the streamer's circuitry. USB hard drives, SSDs, and CD drives all generate high-frequency interference from their controller chips that travels along the USB power rail. An optical connection converts data to light, completely removing the electrical pathway and the noise it carries. This galvanic isolation can lower the noise floor of the audio chain, particularly benefiting the DAC stage of the connected streamer.

Can the RSA720 be used with non-HiFi Rose streamers?

The RSA720's USB 3.0 Type-B input allows connection to any streamer or computer with a standard USB port, providing four-port USB expansion and the noise reduction benefits of its internal hub architecture. The SFP fiber optic input is compatible with any device equipped with a USB 3.0 SFP port, though integration with the ROSE Connect software for library management is specific to HiFi Rose streamers.

Where can I buy the HiFi Rose RSA720 in Buffalo or the USA?

The HiFi Rose RSA720 Optical USB Hub is available at Vinyl Sound in Buffalo, New York, an authorized HiFi Rose dealer serving customers across the USA. Vinyl Sound carries the full HiFi Rose accessories range, including the RS130 Network Transport for customers building a fiber-isolated reference source system.