Note that this is a discontinued product. You may want to visit the brand's page here to browse their newer products.
What reviewers think
Bloggers and YouTubers have tried this product—so we've summarized their strongest opinions below. Links to full reviews follow.
What are hifi reviews useful for? (1) Identifying products you should demo in person at a dealer. (2) Learning which products reviewers unanimously praise as the best they've heard (this means they probably are legitimately great). (3) Identifying a product's attributes that satisfy your idiosyncratic needs and tastes. Beyond that, we often discount what reviewers say because they heap praise on most products—and are often apprehensive about publishing strong criticism or comparisons between products. Further, they seldom have more than a few products on-hand, often relying on their memories to compare past products. Always listen for yourself.
All
d1-biunity
reviews
Video Review
Manufacturer details
Features
Specifications
- Inputs: 192KHz asynchronous Xmos USB, 192KHz coax RCA, 192KHz AES-EBU, 96KHz optical
- Output Level: 3.5Vrms max RCA, 7Vrms max XLR
- Power Consumption: 14.2W @44.1KHz, 16.5W @192KHz
- DAC Dimensions (HxWxD): 110mm x 360mm x 290mm
- Power Supply Dimensions (HxWxD): 65mm x 122mm x 180mm
- Weight: 7kg
- Supported Formats: 44.1KHz, 48KHz, 88.2KHz, 96KHz, 176.4KHz and 192KHz, 16 to 24 bit
Description
The d1-biunity benefits from the new Totaldac "unity" DAC architecture, with about 200 components upgraded or added to the electronic boards. The d1-biunity is a d1-unity but with 2 R2R ladders per channel instead of one, giving a lower noise and the real scale of each instrument.
Release Timeline
Manufacturer Site
Brand highlights
Taking a step back to look at reviewers' thoughts of the brand's entire lineup—not just this product—what stands out most is the following:
- Totaldac's DACs employ a discrete R2R resistor ladder design, utilizing meticulously chosen, high-precision Vishay Bulk Metal Foil resistors (typically 100+ per channel), rather than integrated DAC chips, for its digital-to-analog conversion.
- The brand stands out for its highly natural and "analogue-like" sound, often described as possessing tonal density, harmonic richness, and a realistic presence that some find lacking in many other digital sources.
- Totaldac products offer a unique level of customizability, allowing users to select options such as DSD playback, bass boost, and even the material of the front panel to tailor the sound to their preferences.
- They have designed their digital volume control to minimize negative impact, offering the flexibility to connect directly to a power amplifier, but recommend the use of an external preamplifier.
Select products
Select product comparisons
D1-core
- Positioning: The entry-level model in the Totaldac lineup.
- Description: Offers a natural and musical sound, using the same ladder resistors and FPGA as higher-end models, making it a great performer for its price. It is ideal for those with a smaller budget who still want high-quality sound, but it lacks some of the advanced features and components found in more expensive models like the D1-unity.
D1-unity
- Positioning: A mid-range model that introduces the new "unity" DAC architecture.
- Description: Enhances sound presence and clarity with its upgraded clock distribution and lower jitter, making it suitable for users seeking a more realistic and dynamic sound. Compared to the D1-core, it offers improved component quality and a new output stage.
D1-biunity
- Positioning: A step above the D1-unity, featuring dual R2R ladders per channel.
- Description: Provides a lower noise floor and more accurate instrument scale, making it perfect for audiophiles who prioritize sound detail and precision. It builds on the D1-unity's architecture with additional components.
D1-triunity
- Positioning: A high-end model with three R2R ladders per channel.
- Description: Delivers exceptional detail and tonal precision, ideal for users who demand the utmost in digital playback quality. It surpasses the D1-biunity by further reducing noise and enhancing sound realism.
D1-sublime
- Positioning: The flagship model, incorporating multiple components and accessories for ultimate performance.
- Description: Offers outstanding 3D sound and body, making it the top choice for those who want the best audio experience possible. It includes monobloc DACs and a reclocker, setting it apart from the D1-triunity with its comprehensive setup.
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Avg. Product Price
$10,001-$20,000
Used For Sale
2
Available (Scroll Down)
Brand Popularity
379
of 900+
Badges
Top 50 Brand
Top 250 Brand
Products Listed
12
Founding Year
2010
Our take on the brand
Totaldac is known for using R-2R ladder DAC technology with discrete resistors and high-precision Vishay metal foil resistors, aiming to provide a more natural, analog-like sound without oversampling or digital filters. The brand appeals to audiophiles who prioritize listening experience over measurements, with their products delivering a rich, dense tone that many compare to live performances.
Look inside the brand
Brand Page
Our interview with the brand
What are two key technological innovations or strong opinions that differ you from other brands?
What's your approach to customer support?
What are your favorite tracks for showcasing the strength of your products?
What other products pair best with yours?
From our interview with
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Brand Page
Used
Totaldac
All of the Brand's Used Products
What if you spend more?
Totaldac
d1-triunity
23089
23089
/
3
Reviews
Totaldac is known for using R-2R ladder DAC technology with discrete resistors and high-precision Vishay metal foil resistors, aiming to provide a more natural, analog-like sound without oversampling or digital filters. The brand appeals to audiophiles who prioritize listening experience over measurements, with their products delivering a rich, dense tone that many compare to live performances.
Expand Details
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Our summary
Product Strengths
- The d1-triunity DAC is praised for its ability to reflect the core characteristics of music with purism and vibrancy
- The 'unity' architecture provides more presence, more contrast between the timbres and sizes of each instrument, more clarity, and at the same time more body and more dynamics—making the sound more realistic and natural
- Offers a richer, sweeter, fuller sound and a more spacious presentation compared to the d1-unity
- Achieves dynamic power, low-frequency depth, and punch with a skillfully engineered Class-A output stage providing double the voltage
- Transmits detail and nuance without sounding etched or bright, and provides great tonality, especially with acoustic instruments
Product Considerations
- The chassis is constructed from folded steel and the rear panel is of a thin gauge, which makes the external construction less substantial than some rivals
- Maximum resolution of 24-bit/192 kHz without the optional DSD module might be a limitation
Comparisons (according to reviewers)
- The d1-triunity brings improvements that make music sound more vibrant and alive, while offering a finer-grained view compared to the Totaldac d1-unity
- The d1-triunity provides universal compatibility in terms of voltage output, and advances the sonic performance aspect compared to the Totaldac d1-direct
Takeaway: The d1-triunity is an impressive DAC that effortlessly handles music and makes it emotion-tugging with crystallizing quality. It offers remarkable musical insight without sacrificing speed and clarity, making it a worthwhile addition to any high-end audio system.
Video review
Our take on the brand
Totaldac is known for using R-2R ladder DAC technology with discrete resistors and high-precision Vishay metal foil resistors, aiming to provide a more natural, analog-like sound without oversampling or digital filters. The brand appeals to audiophiles who prioritize listening experience over measurements, with their products delivering a rich, dense tone that many compare to live performances.
Product Page
Product Page
SW1X
DAC IV
25275
25275
/
2
Reviews
SW1X Audio Design creates DACs that use a non-oversampling approach and vintage TDA1541 chips with tube output stages, avoiding digital filtering to maintain a more natural, analog-like sound. Their products feature separate power supply chassis designs and harmonically matched vintage components, including directly heated triode tubes and AB resistors, which are carefully selected for their distinctive sonic qualities.
Expand Details
Our summary
Product Strengths
- Notable focus and density to the midrange that is unparalleled compared to other DACs
- Exceeding naturalness and deep detail
- Top end is smooth, and the low end is present and provides a substantial foundation
- More precise, revealing, and dynamic presentation
Product Considerations
- The review unit lacked a USB input, only offering AES/EBU and S/PDIF over Coax as inputs
- Might not suit audiophiles who prize dry, bright, or hard-sounding digital audio
Comparisons (according to reviewers)
- Compared to solid-state DACs, the SW1X DAC IV Special has unparalleled focus and immediacy of dynamics, especially in the midrange
- Compared to the SW1X DAC V—the DAC IV has a more precise, revealing, and dynamic presentation
Takeaway: The SW1X DAC IV Special could be the answer if one wants to feel more emotionally connected to their music and escape the constant analysis of typical audiophile listening. It's designed to provide a musically engaging experience.
Video review
Our take on the brand
SW1X Audio Design creates DACs that use a non-oversampling approach and vintage TDA1541 chips with tube output stages, avoiding digital filtering to maintain a more natural, analog-like sound. Their products feature separate power supply chassis designs and harmonically matched vintage components, including directly heated triode tubes and AB resistors, which are carefully selected for their distinctive sonic qualities.
Product Page
Product Page
What competes at this price?
Totaldac
d1-unity
12069
/
Released
2023
The d1-unity benefits from the new Totaldac "unity" DAC architecture, with about 150 components upgraded or added to the electronic boards. The "unity" architecture allows a better clock distribution, a lower jitter, a lower R2R power supply rail impedance and a lower noise in the digital section. The R2R ladder resistors are still the famous naked Vishay foil.
Totaldac is known for using R-2R ladder DAC technology with discrete resistors and high-precision Vishay metal foil resistors, aiming to provide a more natural, analog-like sound without oversampling or digital filters. The brand appeals to audiophiles who prioritize listening experience over measurements, with their products delivering a rich, dense tone that many compare to live performances.
Expand Details
Our Summary
Product Strengths
- Surprisingly technical, with resolution on par or better than anything else heard at its price point
- Conveys the time of music extremely well, notably with exceptional leading-edge portrayal and high resolution/micro dynamics
- Offers excellent timbre
- The internal streamer presented better clarity in the bass
Product Considerations
- With signals above PCM 24 bits and 192 kHz, the converter down-samples the signals
- DSD signal is converted internally to a PCM signal, since the R2R resistor ladder is a 24-bit circuit
- Treble compensation may be needed for optimal sound, or to lower excessive treble energy
Comparisons (according to reviewers)
- Versus Totaldac d1-tube DAC/Streamer, the d1-unity offers greater clarity, voice, and impact, providing a more fully resolved picture
- Versus Mola Mola Tambaqui DAC, the d1-unity offers more body, tone, and texture, whereas the Mola Mola emphasizes upper frequencies a bit more
- Matches the resolution and dynamic presentation of the Chord Dave
- The internal streamer is marginally better than the Sonore Optical Rendu
Takeaway: The d1-unity is a good option for those seeking an engaging and high-resolution digital source. It is especially suited for listeners who appreciate a physical and vibrant presentation of music.
Video review
Our take on the brand
Totaldac is known for using R-2R ladder DAC technology with discrete resistors and high-precision Vishay metal foil resistors, aiming to provide a more natural, analog-like sound without oversampling or digital filters. The brand appeals to audiophiles who prioritize listening experience over measurements, with their products delivering a rich, dense tone that many compare to live performances.
Product Page
Product Page
SW1X
DAC III (Balanced)
15950
/
Released
2022
The Balanced version of the DAC III is a non-compromise valve output stage design DAC III, equipped with Signal Output Transfromers (OPTs), a smaller brother to the DAC IV and DHT output stage based DAC V. The step up in transparency of the Balanced over the SE version is provided by a signal output transformer de-coupled EL84 power pentode (triode connected) tube output stage driven by the mighty 6N6P double triode.
SW1X Audio Design creates DACs that use a non-oversampling approach and vintage TDA1541 chips with tube output stages, avoiding digital filtering to maintain a more natural, analog-like sound. Their products feature separate power supply chassis designs and harmonically matched vintage components, including directly heated triode tubes and AB resistors, which are carefully selected for their distinctive sonic qualities.
Expand Details
Our Summary
Product Strengths
- Known for analog-like qualities in dealing with transcoding zeros and ones
- Conveys low-level musical complexity and subtle spatial nuances that other DACs have difficulty with
- Produces voices that expand in three dimensions with a refreshing sense of presence, reminiscent of vinyl reproduction
- Returns energy to the music, instead of taking it away
- Reproduces details and anchor points with refreshing vividness, presenting the actuality with the least fragmentation of the sound image
Product Considerations
- A single-ended into a balanced pre configuration caused occasional static, making image difficult to discern during those moments
- Clarity could be improved on very complex choirs and instruments, and more separation would also be beneficial
- The attack on drums is slightly slow—perhaps medium paced—compared to some DACs
Comparisons (according to reviewers)
- Compared to CH Precision C1.2 DAC, the DAC III is more emotionally involving, while the CH Precision sounds markedly cooler, flatter, and more emotionally restrained
- Compared to aqua acoustic quality Formula xHD, the Formula xHD retrieves detail, bass precision, articulation, and transparency better, while the DAC III is airier, more fluid, and more refined
- Compared to Holo Audio May, the attack on drums is slightly slow—perhaps medium paced—and behind the Holo Audio May as well
Takeaway: The SW1X Audio Design DAC III Balanced has a musicality that makes it worth considering. It expresses music in a way that is closer to analog, with a natural transparency and higher degree of contrast.
Video review
Our take on the brand
SW1X Audio Design creates DACs that use a non-oversampling approach and vintage TDA1541 chips with tube output stages, avoiding digital filtering to maintain a more natural, analog-like sound. Their products feature separate power supply chassis designs and harmonically matched vintage components, including directly heated triode tubes and AB resistors, which are carefully selected for their distinctive sonic qualities.
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