DENAFRIPS HERMES 15TH

The DENAFRIPS HERMES 15TH is a reference-class Digital-to-Digital Converter (DDC) engineered to optimize digital signal transmission between modern digital sources and high-performance DACs. Designed as the next step above the IRIS 15TH, it refines incoming digital audio through proprietary signal reconstruction, precision reclocking and galvanic isolation before delivering a cleaner, more stable digital signal to compatible digital-to-analogue converters.

At the heart of the HERMES 15TH is DENAFRIPS' proprietary FPGA digital signal processing architecture working alongside FIFO buffering and high-precision oven-controlled crystal oscillators (OCXO). This advanced design significantly improves timing accuracy while reducing jitter and electrical interference before the signal reaches the connected DAC. Multiple digital inputs and outputs—including USB, AES/EBU, coaxial, optical and dual I²S connections—provide exceptional flexibility for integrating a wide variety of digital sources and DACs.

The HERMES 15TH further distinguishes itself with an upgraded linear power supply built around an 80VA UPOCC copper O-core transformer and multiple independent ultra-low-noise voltage regulators. Combined with a precision CNC-machined aluminium chassis and external master clock compatibility, the design creates an exceptionally stable platform for accurate digital signal processing while supporting future system expansion through compatible master clocks such as the DENAFRIPS TERRA and AETHER MCLK.

Unlike a DAC, the HERMES 15TH performs no digital-to-analogue conversion. Instead, it focuses entirely on reconstructing, reclocking and distributing digital audio with greater precision before conversion takes place. When integrated into a revealing high-end audio system, the result is often improved image stability, enhanced low-level detail and greater overall coherence throughout the digital playback chain.

Highlights

Reference Digital Signal Reconstruction

The HERMES 15TH has been engineered to regenerate and reclock incoming digital audio before it reaches your DAC. By improving timing accuracy and reducing jitter, it delivers a cleaner digital signal for compatible high-performance systems.

Proprietary FPGA Processing

The proprietary FPGA processing platform works together with FIFO buffering to reconstruct digital audio while maintaining data integrity and improving overall timing precision throughout the playback chain.

Dual Precision OCXO Clock Architecture

Unlike the IRIS 15TH, the HERMES 15TH employs precision oven-controlled crystal oscillators (OCXO) for exceptionally stable clock generation. This premium clock technology provides greater long-term frequency stability and lower phase noise.

Comprehensive Digital Connectivity

Multiple digital inputs and outputs—including USB, AES/EBU, coaxial, optical and dual I²S connections—allow seamless integration with computers, music streamers, CD transports and a wide variety of external DACs.

External Master Clock Compatibility

Dedicated external clock inputs allow the HERMES 15TH to synchronise with compatible master clocks such as the DENAFRIPS TERRA and AETHER MCLK for even greater timing precision.

Design & Engineering

Dedicated Digital-to-Digital Conversion

The HERMES 15TH functions exclusively as a Digital-to-Digital Converter (DDC), receiving, reconstructing and reclocking digital audio before transmitting a cleaner signal to an external DAC.

FPGA & FIFO Architecture

Incoming digital audio is processed using proprietary FPGA circuitry and FIFO buffering before being retransmitted through the selected digital output. This architecture improves timing consistency while preserving data accuracy.

Premium OCXO Timing

Dual precision oven-controlled crystal oscillators provide an exceptionally stable clock reference for digital processing. This advanced timing architecture contributes to improved signal stability and reduced phase noise.

High-Performance Linear Power Supply

An 80VA UPOCC copper O-core transformer supplies a carefully engineered linear power supply with multiple ultra-low-noise voltage regulation stages, providing exceptionally clean power for the precision digital circuitry.

Precision CNC Aluminium Chassis

The anodised CNC-machined aluminium enclosure provides excellent structural rigidity while shielding sensitive circuitry from external electrical interference. Its premium construction aligns with the design language of the DENAFRIPS 15TH Anniversary Series.

RockOnAV's Take

The HERMES 15TH builds on everything we like about the IRIS 15TH while taking digital signal processing to a noticeably higher level. The move to precision OCXO clocking, expanded connectivity and a more substantial power supply positions it as an excellent upgrade for enthusiasts pursuing the highest levels of digital performance.

What stands out is the way it refines the digital foundation of an audio system without altering the inherent character of the connected DAC. Instead, it provides greater timing precision, improved image stability and a cleaner signal path that allows high-performance DACs to perform closer to their full potential.

For customers building a reference-quality DENAFRIPS digital front end, the HERMES 15TH pairs naturally with the company's DACs and can be further enhanced through integration with the TERRA or AETHER MCLK. It also serves equally well in systems using premium DACs from other manufacturers.

Who It's For

The DENAFRIPS HERMES 15TH is designed for audiophiles seeking a reference Digital-to-Digital Converter that enhances digital signal quality before conversion. It is ideally suited to systems built around high-performance external DACs where timing accuracy, low jitter and long-term upgrade flexibility are priorities.