Naim today released firmware updates to both the Naim DAC (colloquially known as the nDAC) and the DAC-V1. Both DACs have a strong following and demand for DSD playback has been strong from some international markets.

The firmware updates add single and double rate DSD to both DACs. This has required some significant additional programming and optimisation of the core DSP code which has also benefitted sound quality says the company’s latest press release. Beta testers were most adamant that sound quality had improved they continue.DAC-V1_Front-3-4-3_Med

The Naim DAC accepts DSD input over S/PDIF or on a USB stick (dsf or dff files) plugged into its front or rear USB inputs. DAC-V1’s USB input is asynchronous allowing the connection of a PC, or Mac directly or using S/PDIF. Mac users need no extra drivers, Windows, including Win 10, users will need the new version 2.00.0 driver downloadable from the Naim website.

Sample Rate Conversion (SRC) has also been added to the DAC-V1. This allows the user to configure a digital input to adjust on-the-fly to input clock signals that are out of range. This improves overall robustness with S/PDIF sources that do not have an accurate clock.


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The di322 digital audio decoder from Wadia adds expanded support for high fidelity DSD files to the Wadia line. Via the USB input, the di322 supports DSD64, DSD128 and DSD256 music files. PCM files with sampling rates up to 32-bit/384kHz (including DXD 352.8kHz and DXD 384kHz formats) can also be played through the USB input. With the addition of DSD support, digital music lovers can experience and enjoy some of the latest high resolution music. Its 2 optical and 2 coaxial inputs accept music with resolutions up to 24-bit/192kHz, while the DIN input will allow future Wadia models to connect to the di322 at high performance levels. A pair of variable balanced and unbalanced audio outputs connects the di322 to your amplifier. A high power headphone jack addition is useful for those times when you want a more intimate listening experience. A modern design with a glass top panel and aluminium construction adds to its aesthetic beauty. The di322 can be combined with other Wadia units such as the m330 media server and a315 or a340 amplifiers for a complete system solution.


Technical Specification

Frequency Response
+/-0.5dB from 4Hz to 20,000Hz, +0.5/-3dB from 4Hz to 68,000Hz (Source dependent)
Total Harmonic Distortion
Variable Output Level
0 – 4.0Vrms Unbalanced, 0- 8.0Vrms Balanced
Signal To Noise Ratio (A-Weighted)
Dynamic Range
Output Impedance
600 ohms (Unbalanced and Balanced)
Headphone Load Impedance
20 to 600 ohmsWadia_di322_news_240915_B

Digital Input Signal Format
Coaxial and Optical Inputs – SPDIF (PCM)USB Input – PCM, DSD
Digital Input Sample Rate
Coaxial and Optical: 32kHz, 44.1kHz to 192kHz, 24-Bit
USB: 32kHz, 44.1kHz to 384kHz, 32-Bit (PCM), DSD64, DSD128, DSD256, DXD352.8kHz, DXD384kHz
Digital Inputs
Coaxial 1 and 2: 0.5V p-p/75 ohms, Optical 1 and 2: -15dbm to -21dbm (TOS Link), USB: USB Type B Connector
Power Requirements
100-240 Volts, 50/60Hz at 30 Watts, Standby: Less than 0.5 watt
Overall Dimensions
Width is 17-7/8 inches (45.4cm), Height is 3-3/8 inches (8.6cm) including feet, Depth is 20 inches (50.8cm) including cables
25 pounds (11.4 kg)

Available to order from Wadia dealers now with a suggested retail price for the di322 of $3,500 USD (VAT, shipping and any customs duties related to current standards of individual countries are excluded).

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Schiit Audio, whose Modi DAC and Magni headphone amplifier we recently reviewed, and  announce the availability of its loki ad graphic ALT2new Loki DSD companion DAC, which allows anyone to add DSD playback to any DAC for $149

“Customers have been asking for DSD in our DACs,” said Mike Moffat, Co-Founder of Schiit Audio. “But in our opinion, DSD and PCM playback should not be shared on the same analogue stage. The filtering requirements of DSD are drastically different. Because of this, we chose to offer DSD as a separate, dedicated DSD-only box with pass-through switching, so it can simply be added to any DAC.”

Mike emphasized “any DAC.” Loki is not limited to working with Schiit’s Modi, Bifrost, and Gungnir DACs–it works as a companion to any DAC that has RCA output. 

Loki decodes DSD 1X using the DoP spec and proprietary Schiit firmware on a Microchip PIC controller to provide bit-perfect DSD native playback with a variety of music players on both the PC and Mac platforms. It connects to any PC or Mac via USB, and is powered by the USB bus.


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