Weiss DAC 501
Note: The DAC502 and the DAC501 are essentially the same circuit, with just a rear balanced headphone output added in the DAC502. The 502 is standard component-width, while the 501 sports a smaller, desktop-friendly chassis.
"The shootouts showed an upside suggesting a higher value than the prodigious investment of the Weiss, and that these levels of digital audio are possible."
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The Weiss DAC501 and DAC502 represent the pinnacle of development from a Swiss company founded by an original pioneer of digital processing and conversion.
Beyond the vivid and detailed sound of an award-winning digital converter, the finely-crafted onboard DSP (Digital Signal Processing) features take the DAC's function to another level. Equalization in the digital realm, for instance, is a modern, uncompromised solution to an age-old issue, and owners of a Weiss DAC are able to take full advantage of the company's years of dominance in this pro audio specialty.
The Weiss DAC501 and DAC502 aim to be an easy, yet sonically glorious one-box solution, offering advanced streaming capabilities as well. Roon Ready and bit perfect, you just add an amp and speakers (or powered speakers) and you're done.
Or, connect the converter's balanced outputs to your favorite preamplifier and level the volume at 0dB to hear attenuation-free, perfect audio.
Weiss Engineering's 30 year history in the pro audio recording and mastering businesses have taught them a thing or two. They consider the DAC501 and DAC502 to be "The essence of their experiences."Find out what that sounds like, and why critics continue to rave about the Swiss converters by connecting with our experts today.
Features MechanicsThe DAC50x uses a stainless steel chassis with a solid 10 mm aluminium front plate.Power SupplyA powerful non-switching power supply is used. All sensitive voltages have their own regulators which are separated between left and right channels. The result is an analog output free of “digital noise” and channel crosstalk. The power switch activates a semiconductor relay which only switches on or off at zero crossings of the mains voltage. This assures a glitch free power switching. The two mains transformers are toroidal types. Mains voltage selection is done automatically by measuring the mains voltage before power is applied to the rest of the electronics.SynchronizationAn internal high precision / low jitter clock generator is responsible for clocking the D/A converter section. The sampling frequency of that generator is fixed at about 195kHz. The input signals are converted to the 195kHz sampling frequency for optimal signal quality. This scheme also helps significantly in reducing any jitter related effects. All standard sampling frequencies up to 384 kHz plus DSD x64 and x128 are supported. Digital InputsThere are a total of five inputs:AES/EBU or S/PDIF via XLR, Toslink and RCA socketsUPnP / DLNA via EthernetUSBRoon ReadyAccepted formats: PCM 44.1kHz up to 384 kHz, DSD 64x / 128x.Future formats can be accommodated for via software updates.Signal ProcessingThe DAC50x has a digital signal processing chip built in (DSP).The following DSP algorithms are currently implemented:Room Equalizer - targets bass modes, which are the hardest to tame in a room naturally.Creative Equalizer - DSP-based tone controls, highly engineered to be transparent. Three bands of audiophile cut or boost available for fine tuning.De-Essing - be it from the recording, the speakers or whatever the reason, the surgical de-esser comes in handy from time to time as a subtle tone control.Constant Volume - with the "loudness wars" dying down, popular music can be all over the place, volume-wise. This function transparently levels the volume. Ideal for parties or playlists.Vinyl Emulation - this feature is pure fun, and invokes a real sense of listening to the music on a record.Crosstalk Cancelling (XTC) - this unique and handy function allows speaker users to fully enjoy "binaural" recordings that previously could only be completely experienced with headphones.Loudness Control - following the Fletcher/Munson Curves, this tried-and-true function raises treble and bass at low volumes. This compensates for human hearing characteristics at low sound levels.Headphone Equalizer - to adapt any headphone to the listener's ears in terms of frequency response.Crossfeed - to emulate a speaker based playback impression on headphones. This can be useful on older recordings with instruments panned hard left or right.
Converters - two of the latest 32 bit D/A Converter chips are used. Two D/A conversion channels are used per audio channel, resulting in exceptional performance specifications.Analog OutputsLine out unbalanced on RCA connector.Line out balanced on XLR connector.Headphone out on 1/4" Jack Analogue.For the DAC502: Additional headphone output on a 4 pin XLR connector.Discrete output stages for both line and headphone outputs are employed.The output levels can be set in a coarse manner with 4 steps to adapt for the amplifier or headphone connected. The levels can be set independently for line and headphone outputs.No sound degrading servo mechanisms are used.Front panel controlsA rotary encoder knob for changing parameters and for powering the unit on/off.A touch screen color LCD display.An 1/4 inch headphone socket.An IR receiver.Back panel elementsAnalog outputs on XLR and RCA connectors.Digital inputs on XLR, RCA, TOSLINK, USB, Ethernet connectors.USB type A connector for various applications.Mains connector with fuses.IR Remote ControlAllows to control several functions of the DAC50x, namely:The input selected for conversion.The output type, level, muting, absolute polarity.Power on/off.DSP presets.Web InterfaceThe DAC50x has a web interface for configuring it via a web browser. The following functions are accessible via the web interface:Volume and Balance controls.Input selection.Output type.DSP algorithms configuration.DSP snapshots configuration.Specifications PowerMains voltage: 100…120 V or 200…240 V, automatic voltage selection
Fuse rating: 500 mA slow blow at 100…120 V, 250 mA slow blow at 200…240 V
Power consumption: 25 VA max.
Power consumption in standby: 2.2 VA max.Size DAC501Depth: 30 cmWidth: 18,8 cmHeight: 6,6 cmHeight with feet: 7,2 cmSize RemoteDepth: 2,1 cmWidth: 4,5 cmHeight: 16,6 cmAvailable ColorSilver, BlackDigital Inputs(1) XLR connector(1) RCA connector(1) TOSLINK connector (optical)(1) USB type B connector(1) RJ45 Ethernet connectorAll inputs accept professional or consumer standard , i.e. accept AES/EBU or S/PDIF signals
. Sampling frequencies: 44.1 kHz, 48 kHz, 88.2 kHz, 96 kHz, 176.4 kHz or 192 kHz on any of the inputs. USB and Ethernet also support 352.8 kHz, 384 kHz, DSD64 and DSD128
Maximum input word-length: 24 / 32 BitsDigital OutputsnoneAnalog Outputs
(2) XLR connectors (hot on pin 2), short circuit proof output circuitry, DC coupled, low output impedance(2) RCA connectors, short circuit proof output circuitry, DC coupled, low output impedance(1) 6.3mm Jack socket for headphones, DC coupled, low output impedanceAt the DAC502 only: (1) 4 pin XLR socket for headphones, DC coupled, low output impedanceThe output level is selectable via the LCD menu or the web interface; four settings are provided as shown below:XLR Output with a 0 dBFS sine wave input:0 dB setting: 6.8 Vrms +18.9 dBu-10 dB setting:
2.2 Vrms +8.9 dBu-20 dB setting: 0.68 Vrms -1.1 dBu-30 dB setting: 0.22 Vrms -11.1 dBuThese levels are achieved with a 0.0 dB setting for the level control on the LCD screen.Suggested subsequent amplifier input impedances:
0 dB setting: 900 Ω or higher
-10 dB setting: 100 Ω or higher
-20 dB setting: 60 Ω or higher
-30 dB setting: 60 Ω or higherRCA Output with a 0 dBFS sine wave input:0 dB setting: 3.4 Vrms +12.9 dBu-10 dB setting:
1.1 Vrms +2.9 dBu-20 dB setting: 0.34 Vrms -7.1 dBu-30 dB setting: 0.11 Vrms -17.1 dBuThese levels are achieved with a 0.0 dB setting for the level control on the LCD screen.Suggested subsequent amplifier input impedances:
0 dB setting: 450 Ω or higher
-10 dB setting: 50 Ω or higher
-20 dB setting: 30 Ω or higher
-30 dB setting: 30 Ω or higher
Headphone Output:(1) stereo 1/4-inch jack connector, DC coupled. The output level is selectable via the LCD menu; four level settings are provided as shown below:Headphone output with a 0 dBFS sine wave input:0 dB setting: 6.8 Vrms +18.9 dBu-10 dB setting:
2.2 Vrms +8.9 dBu-20 dB setting: 0.68 Vrms -1.1 dBu-30 dB setting: 0.22 Vrms -11.1 dBu￼These levels are achieved with a 0.0 dB setting for the level control on the LCD screen.Suggested headphone impedances:0 dB setting: 200 Ω or higher
-10 dB setting: 30 Ω or higher
-20 dB setting: 10 Ω or higher
-30 dB setting: 4 Ω or higherThe same parameters apply to the 4 pin headphone output of the DAC502 as well.Synchronization
Via the input signal in case of the AES/EBU and S/PDIF inputs. Via the internal oscillator in the case of USB and Ethernet inputs
D/A Converter chip
Over-sampling multi-bit sigma-delta converterTwo converters per audio channel
Measurements Main Output
The measurements below have been taken at the following conditions (unless noted otherwise): 1 kHz measurement frequency, maximum selectable output level, 192 kHz sampling frequency (Fs), 22 kHz measurement bandwidth, unweighted, 0 dBr equals the output level at 0 dBFS input.Frequency Response:
Fs = 44.1 kHz, 0 Hz…20 kHz: within ±0.25 dBFs = 88.2 kHz, 0 Hz…20 kHz: within ±0.25 dB
Fs = 88.2 kHz, 0 Hz…40 kHz: within ±0.8 dB
Fs = 176.4 kHz, 0 Hz…20 kHz: within ±0.25 dB
Fs = 176.4 kHz, 0 Hz…40 kHz: within ±0.8 dB
Fs = 176.4 kHz, 0 Hz…80 kHz: within ±2.5 dB
Total Harmonic Distortion plus Noise (THD+N):
-111 dBr (0.0003 %) at −3 dBFS input level
-125 dBr (0.000056 %) at −40 dBFS input level
-125 dBr (0.000056 %) at −70 dBFS input levelLinearity:
At 0 dBFS to −120 dBFS input level: less than ±0.2 dB deviation from idealSpurious components (including harmonics):
At 0 dBFS input level, maximum output level, 1 kHz, all components at less than −110 dB
At 0 dBFS input level, maximum output level, 4 kHz, all components at less than −110 dBCrosstalk:
Better than 110 dB, 20 Hz…20 kHzInterchannel Phase Response:
±0.3° 20 Hz…20 kHz±0.6° 20 Hz…80 kHzAwardsProduct of the Year Awards!AudioArt - DAC Products of the Year 2020SoundStage Pioneering Design Achievement26th Guangzhou AV fair - Best DACMyHiend - Best Innovation AwardAudiophile/Videophile - Product of the YearHiFiReview - Product of the Year
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