The Weiss 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.
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. AES/EBU signals on a single connector are 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-MK2 virtually immune to jitter over a very wide bandwidth.
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.
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.
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.
Four switches for input selection
Six LEDs for sampling frequency display (44.1 / 48 / 88.2 / 96 / 176.4 / 192)
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
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
Mains voltage: 115 V or 230 V with voltage selector
Fuse rating: 500 mA slow blow
Power consumption: 80 VA max.
Depth: 30 cm
Width: 43,3 cm (19")
Height: 4,4 cm (1HU)
Sampling frequencies: 44.1 kHz, 48 kHz, 88.2 kHz, 96 kHz, 176.4 kHz, 192 kHz
Maximum sampling frequency deviation: ±80 ppm
Maximum input word-length: 24 Bits
Channel Status Data: Input accepts professional or consumer format
Connector: Three XLR female (110 ), one TOSLINK (optical)
Three XLR male connectors with buffered versions of the corresponding XLR input. One of the outputs can be switched such that it reflects the currently selected input to the DAC. Analog Output DAC1-MK2:
Two XLR male connectors, pin 1 ground, pin 2 hot, pin 3 cold
No servo circuit
Not earth free
Short circuit proof
Output impedance: 0.2
Output level: continuously variable between dBu and +27 dBu including a 12 dB high/low switch Wired Remote Control Connector:
15 pin DSUB connector pinout:
03 Key #2 (switch to ground, selects input #2)
04 Key #4 (switch to ground, selects input #4)
05 LED #1 (anode of LED for key #1, cathode at ground)
06 LED #3 (anode of LED for key #3, cathode at ground)
08 +5 V supply for external fader (connect fader between +5 V and ground)
09 Not connected
10 Key #1 (switch to ground, selects input #1)
11 Key #3 (switch to ground, selects input #3)
12 LED #2 (anode of LED for key #2, cathode at ground)
13 LED #4 (anode of LED for key #4, cathode at ground)
14 Fader channel 1 taper
15 Fader channel 2 taper
USB interface with DSD to PCM conversion capability
ST glass fiber input
IR remote control for volume control (DAC1-MK3 only)
Wired remote control for volume control and inout source selection
Measurements taken at the following conditions (unless otherwise noticed): +27 dBu output level, 0 dBFS input level, 44.1 kHz sampling frequency (fs), 22 kHz measurement bandwidth.
Fs = 44.1 kHz, DC...20 kHz: ±0.05 dB
Fs = 48 kHz, DC...20 kHz: ±0.05 dB
Fs = 88.2 kHz, DC...40 kHz: ±0.5 dB
Fs = 96 kHz, DC...40 kHz: ±0.5 dB
115 dB unweighted
118 dB A-weighted
THD+N at 1kHz:
At 3 dBFS input: 104 dB
At 0 dBFS input: 105 dB
SNR at 40 dBFS input:
114 dB unweighted, relative to full scale output
117 dB A-weighted, relative to full scale output
From 0 dBFS to 100 dBFS input level: less than ±1 dB deviation from ideal
From 100 dBFS to 130 dBFS input level: less than ±1.5 dB deviation from ideal