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DAC1-MK2 and DAC1-MK3  D/A Converter

NEW: The DAC1 (all variants) is now available in a Firewire version. Earlier units can be upgraded. The Firewire interface allows to connect the DAC1 to PC or MAC computers. The features of the Firewire interface are the same as those of the INT202 interface as shown here.

NEW: The DAC1 is now available in a MK3 version, which means a new analog section, including a new state of the art DAC chip. It uses eight of our in house designed discrete operational amplifiers for a non compromise performance. Also the MK3 version sports an optional infrared remote control for the volume.

The MK3 analog section:

 

The DAC1-MK2 is a stereo 24 bit / 192khz D/A converter designed with the aim of keeping an absolutely uncompromised audio signal path. Much detail and thought was spent on the digital input as well as the analogue output stage. Both have in common the purest possible approach in audio design, aspiring for nothing less than excellence. This is coupled with an ergonomic design that gives the user immediate access to all necessary functions, while keeping an uncluttered and thus easy-to-use front panel. This combination makes a truly professional D/A converter catering for the highest expectations.

Inputs:
There are three digital inputs on XLR connectors, and one on Toslink (optical). The accepted sampling frequencies are 44.1, 48, 88.2, 96, 176.4, 192 kHz. AES/EBU signals in single wire or dual wire formats are used. Each XLR input is actively routed to a corresponding XLR digital output, allowing monitoring at multiple stages in a digital studio setup.

Synchronization:
Several signal reclocking schemes are combined for extremely high jitter attenuation, making the DAC1-MK2 virtually immune to jitter over a very wide bandwidth.

Converters:
The correlation technique (using two converters per channel) which was already successfully employed in the ADC1 gives the DAC1-MK2 an edge over other D/A converters with equal wordlength and sampling rate specifications, resulting in improved SNR and THD.

Outputs:
The discrete Class A outputs have a virtually zero Ohm output impedance, but still can drive large loads without stability problems. Output levels can be set between -infinity and +27dBu. The outputs are symmetrical, but do not have any sound degrading servo mechanisms built in. For asymmetrical operation only one leg of the XLR connector (plus ground) is used.

Remote:
By hooking up an analog potentiometer or fader to the remote connector, the output level can be remote controlled. This level control happens in the digital domain. The input source selection can also be remote controlled.

Frontpanel Elements:

  • Four switches for input selection
  • Four LEDs for sampling frequency display
  • Three LEDs for input wordlength display (1..16, 17..20, 21..24 bits)
  • One Emphasis LED
  • Two 25 turn trim potentiometers for fine trimming the output level

Backpanel Elements:

  • Three digital inputs on XLR
  • One digital input on Toslink
  • Three digital outputs on XLR, buffered from XLR inputs
  • Two analog outputs (channel 1,2) on XLR
  • Output level range switch (high / low) Remote connector with the following signals:
    • Power supply to external faders
    • Tapers from two external faders
    • four input selection switches
    • four LEDs for input selection switches


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