Varèse is the first dCS system built around the Differential Ring DAC, and it changes the shape of a dCS system as much as the converter inside it. For thirty years the Ring DAC has been a bank of equal-value current sources switched by an FPGA, with a mapping algorithm choosing which sources fire for each sample so that component tolerances average out as low-level noise rather than signal-correlated distortion. Varèse doubles the number of current sources and runs them in a new differential mode, which dCS calls the biggest change to its converter in a generation. The published results are residual noise better than −118 dB0 and spurious responses better than −115 dB0 across the audio band, against −113 dB0 and −105 dB0 for the APEX generation. Each channel gets its own Mono DAC chassis with its own transformer, supplies and analog output stage, so left and right conversion share no enclosure, no ground and no power supply.
Everything upstream of conversion lives in the Core, a 244 mm-tall chassis that handles input selection, network streaming, upsampling, noise shaping and filtering, and sends finished data to each Mono DAC. The Master Clock supplies the timing reference, and the User Interface, a full-color touch screen with album art, queue and settings, is a separate box so that neither display nor control electronics share an enclosure with the converters. The link between them is ACTUS, a dCS interface carried on a single cable of six twisted pairs from the Core to each component. It carries asynchronous, error-corrected audio, control data and the master clock signal using dCS Tomix, a patented clocking method developed because, in dCS's words, no existing protocol achieved perfect synchronicity over an IP-style link. Tomix keeps both Mono DACs converting on the same sample edge, so there are no word clock cables, no sync-mode menus and no question of which unit is master. Compared with a Vivaldi stack, which needs Dual AES and three word clock runs, Varèse connects with one cable per box plus mains.
The analog output is two balanced pairs on XLR and two unbalanced pairs on RCA, with full-scale levels of 0.2 V, 0.6 V, 2 V or 6 V set in the menu; the balanced output impedance is 1.5 Ω and the unbalanced 52 Ω, into a recommended 10 kΩ–100 kΩ load. The digital volume control, operated from the User Interface, the Mosaic ACTUS app or the optional Bluetooth Remote Control, is intended to feed power amplifiers directly, which is how most Varèse systems are run. Paul Miller's lab report for Hi-Fi News measured an A-weighted signal-to-noise ratio of 118.1 dB, distortion of 0.00003% at 1 kHz and full scale, jitter of about 5 ps and a balanced source impedance of 0.55 Ω, with the linear-phase filter flat to 20 kHz and −0.6 dB at 45 kHz; the magazine's 94% verdict called the system "a monumental achievement".
Jason Victor Serinus's review in Stereophile made Varèse the magazine's 2025 Digital Source Component of the Year. He wrote that with three guitarists playing at once "every note was 100% clear", heard no distortion to distract from the playing, and concluded that "the more you listen to Varèse, the more obvious its distinct magic becomes". Alan Sircom in Hi-Fi+ described the effect as "being in the studio" and called the system "a lens on your music, not a microscope on a musical experiment". The common thread in these accounts is not analytical detail but ease: a very low noise floor and stable left-right timing let dense recordings separate into individual lines without any sense of effort, and the character holds at low volume as well as high. Six PCM filters, the DSD filter set and three Ring DAC mapper settings are available in Mosaic ACTUS for owners who want to tune the presentation; the dCS defaults are a sensible place to start.
As standard the Core streams over Ethernet (Roon Ready, UPnP, the services in the Mosaic ACTUS app) and plays from USB storage; PCM is accepted to 24-bit/384 kS/s and DSD from DSD64 to DSD512. The optional I/O Module, fitted at the factory or by the dealer, adds a USB-B input for servers and computers, three AES/EBU inputs (AES 1+2 usable as a Dual AES pair to 384 kS/s) for transports and other digital sources, an S/PDIF output and a word clock output. For CD and SACD the matching
Varèse Transport reads discs in their native format and sends the data to the Core over its own ACTUS cable. The system listed here is dCS's own published example, priced from the dCS US price list effective 1 October 2026: the Varèse Core ($102,000), the Mono DAC pair ($114,410), the Master Clock ($40,205) and the User Interface ($22,000), with four 1.5 m ACTUS cables ($3,795 each), for $293,795. The Remote Control ($1,500), I/O Module ($15,500) and Transport ($41,205) are quoted separately.
Varèse sits above
Vivaldi APEX, which remains in the range as a four-box stack with the APEX Ring DAC, and differs from it in three respects: a separate DAC chassis for each channel, the Differential Ring DAC, and the replacement of word clock and AES links with ACTUS. It is a system that rewards a power amplifier of comparable resolution driven directly from its volume control. We most often plan it with the
Boulder 2160 or
Boulder 3060 stereo amplifiers, the
Burmester 218 or
Burmester 159, or the
Audio Research Reference 330M monoblocks, feeding loudspeakers such as the
Magico S7,
Magico M7 and
Magico M9 or the
Sonus faber Aida II and
Suprema, on an HRS rack sized for five full-width chassis and the ACTUS bend radius. Ask us to arrange an extended audition in Portland, with the Transport if discs matter to you.
Each technology below is explained in depth in
the dCS technology library;
the dCS story follows the company from radar converters in 1987 to the Varèse.
The Varèse is compared with the Rossini and Vivaldi stacks on
the dCS stacks page; its two apps are explained in
Mosaic and Mosaic ACTUS.
