Prometheus
from $42,300 Made to order
Request a build slot Deposit, lead time and warrantyAll units in the photos are real. Some photos are AI-enhanced to improve image quality.
The window filter
No output filter, no phase shift
PCM is converted to DSD on the chip and passed through a logic-based window filter, so there is no LC output filter and none of the phase shift it brings.
Sound
Fast, detailed and natural
A bandwidth of 1 Hz – 50 kHz, native DSD1024 and PCM up to 32-bit / 768 kHz, for studio-quality and high-resolution recordings of any genre.
Output stage
Solid-state, or a tube of your choice
The recommended output stage is solid-state; a tube stage on AL4, EL8, EF14 or ML6 is available.
Made to order
Assembled by hand
A black metal chassis, galvanically isolated transformers and Proprietary “RareCoreFusion” Alloy wiring, assembled by hand. Each unit is built to order and numbered on its nameplate.
Prometheus
Numbered unit — Opus No. on the nameplate
- Model
- Programmable-logic DAC with a window filter — native DSD1024 and PCM 32/768
- In brief
- The newest Demograf Audio converter, built on a programmable-logic chip that runs Demograf Audio’s own software.
- Queue deposit
- 50% · from $21,100
- Lead time
- Seven pieces of gear a year, each built by hand to order. Current lead time: six months or more.
- Origin
- Made in Kazakhstan by Dmitriy Gubchenko
- Warranty
- 1 year (extra warranty available: +1 or +2 years)
Part of the Invictus Valour collection
- Music it suits
- Studio-quality and high-resolution recordings of any genre
From the atelier
Prometheus is the newest Demograf Audio converter, built on a programmable-logic chip running Demograf Audio software. PCM is converted to DSD on the chip and passed through a logic-based “window filter”, so there is no LC output filter and none of the phase shift it brings. The result is fast, detailed and natural, with a bandwidth of 1 Hz – 50 kHz. The recommended output stage is solid-state; a tube stage on AL4, EL8, EF14 or ML6 is available.
Hand-assembled in a black metal chassis with galvanically isolated transformers and Proprietary “RareCoreFusion” Alloy wiring.
- Inputs: S/PDIF coaxial, USB (Amanero), I2S (HDMI)
- PCM up to 32-bit / 768 kHz; DSD1024 via I2S, DSD512 via USB
- Output 2 V (4 V optional), RCA; XLR optional
- Ground lift switch
| Component | Manufacturer | Country of origin |
|---|---|---|
| Programmable-logic processor with Demograf Audio software | Demograf Audio | Own manufacture |
| USB interface | Amanero | Italy |
| Power transformers (galvanically isolated) | Demograf Audio (custom-wound) | or analog by Hashimoto / Tango / Tamura |
| Output tubes (option) AL4 / EL8 / EF14 / ML6 | NOS, selected | US / EU / UK (NOS) / Other Vintage |
| Internal wiring: Proprietary “RareCoreFusion” Alloy | Demograf Audio | Own manufacture |
Photo {n} of {total}
Simplified diagram of the stock configuration. The exact circuit for your options is confirmed with the atelier.
Specification
Download the brochure PDF · EN · 0.6 MB
Measured on the stock configuration; options may change the figures.
- Device type
- Professional programmable-logic Digital-to-Analogue Converter
- Core technology
- Custom programmable-logic processor running proprietary software
- Filter architecture
- Proprietary Logic-Based “Window Filter” (PCM-to-DSD, no LC filters)
- Digital inputs
- S/PDIF Coaxial, USB (Amanero), I2S (HDMI Type)
- Analogue outputs
- RCA (Optional: Balanced XLR)
- Output voltage
- 2 V (customisable)
- Frequency range
- 1 Hz – 50 kHz
- PCM support
- Up to 32-bit / 768 kHz via HDMI / USB
- DSD support
- Up to DSD1024 via HDMI / DSD512 via USB Amanero
- Rectifier tube (optional)
- 5Ts4M (5Y3) and equivalents
- Output tubes (optional)
- EF14 / EL8 / AL4 / ML6 or equivalents
- Transformers
- Galvanically isolated
- Internal wiring
- Proprietary “RareCoreFusion” Alloy wire (other options available)
- Special features
- Ground Lift Switch (Defeatable Grounding)
- Mains
- 100 / 120 / 230 V — set at order time, plug to match (NEMA, Schuko, BS 1363 / type G)
- Weight
- From 7 kg (varies by metal choice)
- Dimensions
- From 330 × 250 × 120 mm (Customisable)
Custom options
Stock items are included in the price. Every option is agreed with the atelier before the build starts.
Output stage
- Solid-State Output (recommended) Stock
- AL4 Vacuum Tube Output
- EL8 Vacuum Tube Output
- EF14 Vacuum Tube Output
- ML6 Vacuum Tube Output
- Tube-Switching Module Upgrade
Rectifier tube
- Solid-State Rectifier (recommended) Stock
- 5Ts4M
- 5Y3
- Other Type (on request)
Output voltage
- 2 V Stock
- 4 V
- Other (on request)
Component upgrades
- Premium Capacitors
- Custom Transformers & Chokes
- AMRG Resistors & Cardas Wiring Kit
- Top Connectors Suite
- Multi-DAC Topology
- Upgraded External Power Supply (PSU)
- Vintage Tubes
- ALPS Volume Control
- Demograf Audio Swiss-Stepped Pre-Amp
- Integrated Class-A Amplifier
- Integrated Class-D Amplifier
- Integrated Tone Control Block Module / Filter
- One additional Digital S/PDIF Coaxial Input
- One additional Digital AES/EBU Input
- One additional Master Clock Input
- Raspberry Pi 5 Streamer inside
- One additional Digital BNC Input
- One additional Digital TOSLINK (Optical) Input
- One additional Digital I2S (HDMI Type) Input
- One additional Analogue RCA Output
- One additional Analogue XLR Balanced Output
- Additional Reserve Matched Pair of low-noise Tubes
Mains inlet, outlets & contacts
- AC Input: Standard Spec — IEC C14 Chassis Input Stock
- AC Input: Heavy-Duty Spec — IEC C20 High-Current Inlet
- AC Output: European Standard — Schuko (Type F) Stock
- AC Output: US / Japan Standard — NEMA 5-15R (Type B)
- AC Output: British Standard — BS 1363 (Type G)
- AC Output: Universal Interface — Direct IEC C13 Outlets
- Contacts: Pure Copper Unplated (Organic & Balanced Tone) Stock
- Contacts: Gold Plated e.g. Furutech FI-09(G) (Warmth & Rich Midrange Texture)
- Contacts: Rhodium Plated e.g. Furutech FI-09(R) (Fast Transients & Fine Detail)
Finish & chassis
- Standard configuration Stock
- Priority build (+50% of the price)
- Precision-Milled Metal Chassis (CNC milling)
- Contoured Bent-Metal Enclosure
- Exotic Hardwood Chassis
- Glass-Integrated Aesthetic
- Premium Wood Inlays & Accents
- Solid-Billet Metal Enclosure
- Advanced Galvanic Finishing
- Custom Dimensions & Form Factor
- Parameter Status Display
- Multifunction Remote Control Suite
Regional version
- 230 V — Schuko plug (Europe) Stock
- 120 V — NEMA plug (North America)
- 100 V — NEMA plug (Japan)
- 230 V — BS 1363 / type G plug (UK · Middle East)
Pairs well with
Does the Prometheus use tubes?
Prometheus is solid-state by default. If you choose the tube output stage (AL4, EL8, EF14 or ML6) or a 5Ts4M rectifier, those tubes are selected before fitting. Tubes are consumables and are not covered by the warranty.
How is the Prometheus serviced?
Each unit ships with its own measurement report. The circuit is kept simple and serviceable, and Demograf Audio gear is serviced for as long as parts exist.
How is it delivered?
Shipping and insurance are paid by the buyer and shown as a separate line in your quotation. Every unit is packed for long-distance transport in heavy-duty flight cases and a wooden crate.
Which mains voltage and plug?
Each piece of gear is built for 100 V, 120 V or 230 V mains with the matching plug (NEMA, Schuko or BS 1363 / type G). The voltage is fixed at order time, so tell us where the unit will be used.
How long does the Prometheus take to build?
Build time is six months or more from the queue deposit, depending on the configuration and the queue; delivery takes from one month after completion. The atelier builds seven instruments a year. A priority build is available for an extra 50% of the price: your unit is moved ahead in the build queue.
* Photos are taken from real systems and show the specific configuration of a particular customer; your unit can look the way you want — all our equipment is fully customisable.
