Do it digitally – ready for high-res audio
With the HELIX Digital Input Module (HDM) your HELIX amplifier accomplishes the perfect transition to the digital world.

It extends our amplifiers with an integrated HDM slot by two optical digital stereo inputs and enables completely interference-free and ground-isolated signal transmission in best possible quality right into the amplifier. The module can handle digital audio signals up to a sampling rate of 96 kHz losslessly via fiber optics cable and converts them back to the analog level via two cutting-edge BurrBrown DA converters.

But that′s not all – in order to get the very last bit of performance out of the amplifier and avoid even the slightest influence of its input stage, the SPDIF Direct In function can be used to route the audio signal from the HDM module directly and without any detours to the output stages of the amplifier.

This makes your HELIX amplifier absolutely future-proof and perfectly equipped for the combination with our digital signal processors.

Features
Two optical digital inputs in SPDIF format inclusive SPDIF Direct In switches
SPDIF Direct In function allows to route the audio signals from the HDM module directly to the amplifier output stages for optimized sound performance
Cutting-edge BurrBrown DA converters with 32 Bit resolution
Accepts digital audio signals up to 96 kHz sample rate
Including device-specific side panel

Technical data
Inputs 2 x Optical
Input sampling rate
28 kHz to 96 kHz
Input format
SPDIF

Additional features
SPDIF Direct In function

Compatibility
HELIX C FOUR

Scope of delivery
1 x HDM 2 module
1 x Device-specific side panel for HELIX C FOUR
1 x Allen screw
1 x Allen key
1 x Instruction manual