The Weiss DAC1-MK3 FW 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.
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 and 192kHz. For all sampling frequencies signals on a single connector are supported. For 88.2, 96, 176.4 or 196kHz signals also two connectors (dual wire scheme) can be used. Each XLR input is actively routed to a corresponding XLR digital output, allowing monitoring at multiple stages in a digital studio setup.
Several signal reclocking schemes are combined for extremely high jitter attenuation, making the DAC1-MK3 virtually immune to jitter frequencies in the range from fractions of a Hertz up to tens of kHz.
The correlation technique (using four converters per channel) which was already successfully employed in the ADC1 A/D Converter gives the DAC1-MK3 an edge over other D/A converters with equal wordlength and sampling rate specifications, resulting in improved SNR and THD.
The discrete Class A outputs have a very low output impedance, but can still drive complex loads without stability problems. Output levels can be set between -4dBu and +27dBu. The outputs are symmetrical, but do not have any sound degrading servo mechanisms built in. For asymmetrical operation only pin 2 of the XLR connector plus ground on pin 1 are used, pin 3 must be left open. The analog circuitry of the DAC1-MK3 uses eight of our OP1-BP discrete operational amplifier modules for unprecedented performance.
By hooking up an analog potentiometer or fader to the remote connector, the output level can be remote controlled. A stereo potentiometer or fader allows to control the two channels independently. This level control happens in the digital domain and is dithered in order to avoid any sound degrading quantization effects. The input source selection can also be remote controlled. Four input selection pushbuttons and associated status LEDs are brought to the remote connector.
The Firewire option adds a Firewire input for sampling rates of up to 192kHz. The volume and polarity of the firewire input can be controlled via an (optional) IR remote control unit. In addition the player software on the connected computer can be checked for bit transparent playback.
Front Panel Elements
- Four switches for input selection
- Four LEDs for sampling frequency display (44.1 / 48 / x2 / x4)
- Three LEDs for input wordlength display (1-16, 17-20, 21-24 bits)
- One “zero input” LED
Back Panel Elements
- Three digital inputs on XLR
- One digital input on Toslink
- Three digital outputs on XLR, buffered from XLR inputs
- One switch for monitor source selection on DO3
- Two analog outputs on XLR
- Output level rotary switch (encoder)
- 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