Helix HDM 2 – C FOUR – SPDIF digital input module for HELIX C FOUR
The HDM 2 fits the HDM slot of the HELIX C FOUR amplifier and adds two optical digital stereo inputs. Transmission via optical fibre is free of interference and ground loops, accepts sample rates up to 96 kHz, and the audio is converted to analog by two BurrBrown D/A converters.
With the SPDIF Direct In function the signal can be routed from the module straight to the amplifier output stages, bypassing the input stage. This prepares the amplifier for direct connection to digital signal processors.
Key Features
- Inputs: 2 x optical SPDIF, each with SPDIF Direct In switch
- SPDIF Direct In: signal goes directly to the output stages
- D/A conversion: BurrBrown converters with 32-bit resolution
- Sample rate: 28–96 kHz
- Interference-free: optical transmission without ground loops
- Side panel: device-specific side panel for C FOUR included
Compatibility
- HELIX C FOUR
Technical Specifications
| Inputs | 2 x Optical |
| Input sampling rate |
28 kHz to 96 kHz |
| Input format |
SPDIF |
| Additional features | SPDIF Direct In function |
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
