Iodata Fidata HFAS1 network audio server


Today's high-resolution audio files deliver quality that approaches that of master recordings by incorporating an enormous amount of data. With the debut of network audio, consumers quickly have become familiar with the immersive experience made possible by that level of quality. 

Introducing fidata, a family of network audio components that lives up to the meaning of its name: "reliability."

An audio server engineered for use in high-end systems

The fidata HFAS1 is a network audio server that was engineered so that you can enjoy high-end audio. 

You can see evidence of our meticulous, iterative approach from the materials chosen for the chassis to the design of the unit's circuit board and its individual components. This product is the cumulative result of numerous prototypes and countless trial listening sessions. 

The result is an exceptional level of audio quality that befits the unit's high-end name, packaged in an impressive chassis from which every hint of waste has been pared.

The HFAS1 incorporates two 850EVO high-reliability SSDs from Samsung. 

These drives utilize the manufacturer's 3D V-NAND flash memory to minimize voltage fluctuations through extended durability and reduced power consumption. 

Other design features such as an aluminum enclosure with excellent anti-noise characteristics give the 850EVO characteristics that are exceptionally well suited to audio applications. Additionally, use of flash storage without any moving parts makes it possible to deliver an almost silent listening environment.

Single-point ground to prevent noise generation, leakage, and introduction

Counteracting noise is the single greatest issue in the design of audio devices.  The HFAS1 features an optimized pattern design and a single-point ground configuration that grounds circuitry via a single connection to the unit's copper base. 

This arrangement allows it to generate an exceptionally stable supply of power from which common impedance has been eliminated.

High-capacity electrolytic capacitors

The HFAS1's circuit board incorporates an optimal arrangement of low-ESR electrolytic capacitors that includes some audio-grade components. 

This design implements a high-quality, stable power supply. 25 MHz low-phase-noise crystal oscillator. The HFAS1 uses a vacuum-type crystal oscillator with low phase-noise characteristics. 

In addition to limiting clock jitter, this design implements high-precision network transmission using a clock generated by a high-precision crystal.

Link separation system

The HFAS1 provides two LAN ports, one for audio and one for networking. 

The "for Audio" port is designed to be connected to a network audio player, while its "for Network" counterpart is designed to be connected to the user's home network, enabling the high-quality signal generated by the unit to be transmitted directly to the player.

LAN connectors with exceptional contact performance

The two LAN connectors have been oriented with the signal terminals at the top in order to ensure stable contact with the LAN cables' terminals. 

In addition, the DIP-type LAN connectors used by the HFAS1 each feature a mechanically robust, 14-point connection to the circuit board. 

This design prevents the connector and terminals from becoming misaligned in order to preclude any adverse effects from vibration.

LED-off function to counteract noise

The two LAN ports incorporate LED lamps that flash or illuminate continuously to indicate information such as the connection status and communications speed between the HFAS1 and other audio devices and the router. However, users can disable these lamps on the setup screen in order to minimize any noise resulting from their operation.

Dual high-quality,  high-reliability 50 W switching power supplies

Because the power supply plays a key role in enabling high-quality audio playback, the HFAS1 incorporates two dedicated TDK-Lambda 50 W power supplies (for a total of 100 W), one for the main unit and one for the drive unit. Use of independent power supplies for the system and storage blocks keeps noise from one block from adversely affecting the other.

Support for DSD files as well as WAV and FLAC

Twonky Server 7 adds support for DSD (DFF and DSF) files at bitrates of up to 11.2 MHz to existing support for PCM (WAV) and FLAC files at bitrates of up to 384 kHz (32-bit resolution). 
*As of April 2016