Athena DAC
The Perfect Fusion of Digital Precision and Musical Warmth!
Downloadable Athena DAC, Owner’s Manual
The Best of Both Worlds
The Athena DAC is an advanced digital-to-analog converter that delivers “The Best of Both Worlds.” In collaboration with a team of world-class digital designers, Zesto Audio has fused innovative digital technology with award-winning tube analog circuits, creating one of the most musical DACs on the market today.
ROHM Chip
The Athena DAC sets itself apart with a user-friendly interface and advanced technology that offers superior sound quality and performance with its tube circuitry. At its core is a state-of-the-art ROHM chip, which ensures that every element of the audio is reproduced with breathtaking clarity.
Wide Range of Formats
The Athena DAC accepts a wide range of formats up to 24-bit/384kHz files, with 3 DSD and 8 PCM sample rates. The DAC is equipped with seven versatile inputs, including USB, COAX, Optical, AES/EBU, and I2S. The Athena is designed for ease of use and seamless integration into any audio setup.
Cutting Edge Technology
The Athena DAC is designed not just for audio playback but for an engaging musical journey. With its combination of cutting-edge technology and vintage tube warmth, it redefines what is possible in digital audio conversion.
Experience the Next Level of Audio Fidelity
With its unparalleled combination of ease of use, innovative technology, and a focus on musicality, the Athena DAC is the perfect addition to any audiophile’s setup. Experience the next level of audio fidelity and immerse yourself in your favorite music like never before.
Key Features
- Bit perfect: Native with No Up-Sampling: The Athena DAC maintains the original integrity of the audio signal, ensuring a true-to-source experience.
- Noise-Cancelling Tube Analog Output Circuit: The soul of the Athena DAC lies within its ability to cancel noise, delivering the most musical listening experience.
- No Filters on the Output: All filtering is done through the tube output circuitry with minimal phase shift, creating a better stereo image and black levels. This is the perfect merging of solid-state and tube technologies!
- Proprietary Grounding Scheme: Our innovative design effectively isolates digital noise, providing a clean signal that enhances listening pleasure.
- 4-layer copper Printed Circuit Board for extensive noise reduction.
- Adjustable Ground Switches: Easily eliminate ground loops to remove hum.
- No Negative Feedback: Our design philosophy ensures that your signal is neither limited nor compressed, allowing for dynamic expression.
- Dedicated 12AU7 Output Tubes: Engineered to drive true differential balanced output transformers for significant noise-cancellation.
- 12DW7 Input Tubes: This tube handles the input as well as drives the output tubes. 12DW7 is fast, musical, dynamic, low noise, and offers exceptional sound quality.
- Controlled 2nd-order Harmonic Distortion: With a focus on sound quality, this feature is widely regarded as more musically pleasing.
- Zesto’s exclusive ESP Supply: Anticipates the power needed and does not limit the music’s ability to pull all the power it needs. Optimized for the tube output circuits, these power supplies further enhance the overall performance of the DAC.
- 12 Internal power supply/regulators on the DAC board
- Hidden Knob Feature that changes the slope filter from slow to fast
- Wide Range of Formats up to 32-bit/384kHz files
- 4 DSD Sample Rates: X1 (64), X2 (128), X4 (256), and *X8 (512)
- *X8 both the X2 and X4 DSD LEDs will Illuminate
- 3 Bit Rates: 16, 24 and *32
- *32-bit rate will illuminate the 24-bit LED
- 8 PCM Sample Rates: 44.1, 48, 88.2, 96, 176.4, 192, 352.8, and 384
- DAC will be upgradable for future technology
Specifications:
Inputs
- One USB
- Two Optical (S/PDIF)
- Two RCA Coax (S/PDIF)
- One AES/EBU
- One I2S
Outputs
- Class A, Dual Mono vacuum tube output stage
- No filters on the tube output stage
- One set of true XLR transformer Balanced outputs (pin 2 hot) with an impedance of 300 Ohms
- One set of Single-Ended RCA outputs with an impedance of 300 Ohms
- Maximum peak output level of 3 Volts RMS
- 2 Independent ground lift switches on the left and right outputs
- Recessed RCA and XLR output connectors are gold-plated with an isolated ground.
- No negative feedback
Digital Performance
- State-of-the-art, most musical ROHM DAC chip
- 4-layer copper Printed Circuit Board
- PCM up to 32‑bit / 384 kHz
- DSD64 (X1), 128 (X2), 256 (X4), 512 (X8)
- Native no up sampling
Vacuum Tubes
- Two (2) Gold pin JJ ECC82/12AU7
- Two (2) Gold pin JJ ECC832/12DW7
- High-quality gold pin ceramic sockets
Power
- Power consumption 30W, 0 drain when off
- Voltage 100 to 120V AC 60Hz
- Optional factory installed 220 to 240V AC 50/60Hz
- Standard 3-pin 15 Amp IEC power connector
- ON/OFF power switch conveniently located on the side panel
- Internal ESP Supply Toroidal transformers, 1 300V and 1 12V
- +/- 15V switching power supply
- 12 internal DAC power supply/regulators
Detailed Specifications
- Non-inverting output polarity
- Cross-talk < 90dB
Other Features
- DAC will be upgradable for future technology
- Each unit is hand-made in the USA
- 50-hour factory burn-in on all circuits and vacuum tubes
- Dimensions 17” w X 12” d X 5”h
- Product weight 5 lbs. (9.3 kg)
- Shipping weight 28 lbs. (12.70 kg)
- Shipping box: 21” w x 21” d x 11”h (53.34cm x 53.34cm x 27.94cm)
- 16-gauge zinc-plated steel enclosure
- Two-year limited warranty
- Six months warranty on Vacuum Tubes
World Premier Review of Zesto Audio Athena DAC with ESP Power Supply
03-09-2026 | By Robert H. Levi | Issue 144
“……After throwing every kind of music and connection I could muster including USB, S/PDIF, and AES/EBU, I was unable to make the Zesto Audio Athena DAC with ESP Power Supply do anything but perform to state of the art levels. I have never heard a DAC this alive, lively, and realistic with such extraordinary definition. The level of quiet between instruments is perfection. Switching between bit rates is without flaw. The lights on the front panel clearly show you what is playing. I love the analogue knob dialing in the clearly marked digital sources. I have not heard a DAC on the planet that exceeds the Athena’s performance, tube or solid-state. I go to the symphony to hear the real thing and that is what you will hear with the Athena DAC. I heartily recommend you call your Zesto Audio Dealer and audition the Zesto Audio Athena DAC with ESP Power Supply ASAP.”