- DAC212 design
- The compact housing is part of the DiDiT philosophy that signal ways must be as short and minimalistic as possible.
The diminutive casing necessitated the use of smaller circuit boards and hence more direct signal pathways.
The beautifully designed aluminum enclosure is milled out of one piece of aluminium.
This gives the DAC212 a very sturdy frame preventing any resonances from interfering with the audio range.
Each channel and section (digital and analogue) have their own milled chamber separated from the other circuits.
- The circuit board is "sandwiched"between these chamber walls.
This robust construction removes any possible deleterious resonances in the PCB.
In order to isolate the chassis from vibrations we manufactured stainless steel footers with an integrated Sorbothane ring, so that the DAC212 "floats" on the three Sorbothane rings.
The Sorbothane rings have been specifically tuned to absorb the resonance frequency of the chassis.
Thus no deleterious vibrations can affect the PCB and signal pathways
- All connectors use high-grade teflon and are gold-plated, which guarantees optimum conductivity minimizing signal loss.
- The DAC212 features
- In order to optimize the entire music experience we have incorporated advanced technology in the compact DAC212.
The front-panel houses a beautiful capacitive touch button, turned from stainless steel, surrounded by an illuminated ring.
The ring is lit whenever the DAC212 is in standby mode. The touch sensitive button is used for turning the DAC212 on/off and for input selection
The touch-sense button is used for switching the DAC212 on or off and for input selection.
- A solid aluminium remote control adjusts volume, selects inputs and mutes the device.
To set the muting on or off a soft-switching software is used, avoiding abrupt changes in volume.
Volume spikes are avoided by utilising a soft switching software which ameliorates abrupt changes in volume.
A micro-controller stores the last volume setting(s) for both the RCA outputs and headphone socket.
- Switching the DAC212 on `self-cleans' the relays, as they rapidly open and close thereby avoiding the build up of corrosive particles detrimental to the audio signal.
The microcontroller performs a self-diagnostic on power up in order to prevent system errors.
The DAC212 advanced functions can be accessed via the remote controls progressive menu, for example display brightness and initial volume settings can be determined within the menu structure
- Electronics design
- Component layout and PCB design greatly influence the specifications and sound of audio equipment.
At DiDiT we use advanced CAD/CAM software simulations to optimise the PCB layout. Our design is based on the concept of "virtual grounding and balanced interfacing".
This technique prevents interference generated when multiple circuits share a common ground from causing disturbance to the signal path.
- "The DAC212 uses a highly efficient switched mode power supply (SMPS) which has a very fast response time to power draw.
Moreover, by utilising ample capacitive buffering virtually all of the negative effects of using a SMPS are avoided.
At DiDiT we are fastidious about reducing noise levels in our circuits, as we believe that this greatly improves sonic clarity.
Thus, besides the abundant use of capacitive buffering the DAC212 uses 12 independent ultra low noise local power supply regulators
- Each channel, every stage and the system clock have their own very low noise power-supply regulator, thereby separating the sensitive circuits.
Combined with "Virtual Grounding and balanced interfacing" this results in a very clear signal, free from interferences and conveying the music in its purest way.
- DAC212 PCB design
- The DAC212 is designed around multilayer circuit boards. With multilayer board designs we can assign one layer to an unbroken ground plane, which will give a very low induction design with reduced crosstalk.
All power supply layers are designed in differential pairs. So high and low current traces are individually paired but are separated from each other using the different layers. This design was created using advanced CAD/CAM computer software simulations.
This way of designing drastically reduces overall distortion down below the 0.001% barrier.
- For the DAC212 we selected the best components designed around the famous ESS Sabre 32bits Reference DAC chip and combined this with Crystek femto clocks
The ES9018 is configured with 4 D/A converters in parallel per channel to reduce noise and improve linearity.
Followed by an extremely low noise analogue output stage (-135dB @1kHz full scale).
Most of the components are SMD mount. This greatly reduces the electric field of the component, but the components are also less prone to outside interference.
- Consistent use of our design philosophy results in crystal clear music reproduction.
DiDiT has no sound signature. We just reproduce the music the way the artist meant it to be heard.
- General & Inputs
- Display: Matrix display
- Switch: capacitive touch
- Mains: 100-240VAC
- Inputs: 2 Toslink, 2 Coaxial, USB audio input
- Supported formats: PCM, DSD
- Supported Sample Rates PCM:
- 44.1kHz to 384Khz
- Supported Sample Rates DSD, DXD:
- DSD64 to DSD512, DXD352.8
- Optional slot
- Ambiant light sensor
- Aluminium remote control for basic functions
- Measured Performance
- THD+N: 0.00035% @ 100kOhm
- Linearity: +/- 0.5dB by -115 dBFS
- S/N ration: 122dB (A weighted)
Output noise voltage residue: 1,5µV
- Output Level: 0 dBFS: 1.9 VRMS
- DC Offset: 0.1mV
- Frequency Response: DC to 50kHz +/- 0.1dB DC to 90kHz -3dB
- Total jitter measured at output: 48picoseconds RMS
- Output: DC coupled
- Output Impedance: 1.6Ohm @ 1kHz Max.
- Output Current: 0.25A
- 212mm x 212mm x 45mm (W x L x H)
- Weight: 2.7kg