Atlas
from $24,200 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.
Loudspeakers and headphones
One chassis, two ways to listen
It drives low-impedance dynamic headphones and high-sensitivity loudspeakers from the same chassis; built push-pull, it doubles the power for larger loudspeakers.
Tuned to order
Input tube and rectifier
The input tube is chosen when you order: EL8 for detail, AL4 for weight, EF14 for opera and symphonic music, ML6 for neutrality. Two 6D22S rectifiers give a darker tone, one 5C3S a brighter one.
Atlas
Numbered unit — Opus No. on the nameplate
- Model
- Class A single-ended integrated amplifier on 300B triodes, 5 W
- In brief
- The 300B gives music colour and warmth, with a sweet, organic midrange.
- Queue deposit
- 50% · from $12,100
- Lead time
- Seven pieces of gear a year, each built by hand to order. Current lead time: six months or more.
- Push-pull (PP)
- The stock build is single-ended. A push-pull version is built to order for +50% of the price. Push-pull from $36,200 Request a push-pull build
- Origin
- Made in Kazakhstan by Dmitriy Gubchenko
- Warranty
- 1 year (extra warranty available: +1 or +2 years)
Part of the Legacy collection
- Music it suits
- Jazz · classical · classic rock · vocal
- Compared with
-
- Push-pull 300B version
From the atelier
Atlas is built around the 300B, the directly heated triode Western Electric designed in 1938. Two of them run single-ended in pure Class A and give 5 W per channel at 8 Ω. The 300B gives music colour and warmth, and in Atlas its midrange is sweet and organic.
Who Atlas is for
Atlas is for a listener who wants one amplifier for loudspeakers and dynamic headphones, and who plays mostly jazz, orchestral music and classic rock. Its 5 W suit loudspeakers from about 93 dB in a small or medium room, such as our Cassandra MkII at 95 dB. If your loudspeakers are less sensitive, now or later, Atlas can be built push-pull for double the power.
The model
Atlas is a line-level integrated amplifier: an RCA input (balanced XLR to order), an ALPS volume control and a ground-lift switch against hum. A 6.3 mm and a 4-pin XLR headphone output sit beside the loudspeaker terminals. Its voice is set when you order: the input tube (6Zh4 as standard, or EL8, AL4, EF14 or ML6) and the rectifier (two 6D22S for a darker tone, one 5C3S for a brighter one).
We state the power the amplifier delivers in pure Class A at the stated distortion; the figure comes from the unit’s own measurement report.
All tube amplifiers are built as two-chassis designs by definition, with a galvanic-isolation transformer and a ground-lift switch.
The amplifier and its external power supply are separate chassis; the supply holds the kenotron rectifier, galvanic isolation, custom power transformers, capacitors and chokes. The internal wiring is our “RareCoreFusion” alloy.
- Output: 2 × 300B
- Input: 2 × 6Zh4 (EL8, AL4, EF14 or ML6 to taste)
- Rectifier: 2 × 6D22S (darker) or 1 × 5C3S (brighter)
- Ground lift switch
| Component | Manufacturer | Country of origin |
|---|---|---|
| Output tubes 300B | Selected and matched | US / EU / UK (NOS) / Other Vintage |
| Input tubes 6Zh4 | NOS, selected | US / EU / UK (NOS) / Other Vintage |
| Rectifier tubes 6D22S | NOS, selected | US / EU / UK (NOS) / Other Vintage |
| Transformers and chokes | Demograf Audio (custom-wound) | or analog by Hashimoto / Tango / Tamura |
| Volume control | ALPS | Japan |
| 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.
When delivering to countries that have imposed sanctions, we do not install sanctioned components; we fit vintage and modern equivalents instead.
Specification
Download the brochure PDF · EN · 0.8 MB
Measured on the stock configuration; options may change the figures.
- Use
- Universal: loudspeakers and headphones
- Output power
- 5 W per channel at 8 Ω (Push-Pull version with double power available on request)
- Amplifier class
- Pure Class A
- Channels
- 2 (Stereo)
- Inputs
- Analogue RCA (Optional: Balanced XLR)
- Headphone outputs
- 1 × 6.3 mm TRS, 1 × XLR 4-pin (Optional: 2.5 mm, 3.5 mm, 4.4 mm Pentaconn, dual XLR 3-pin, or Electrostatic/EST connector)
- Speaker outputs
- Standard binding posts (Demograf Audio terminals optional)
- Load impedance
- 8 Ω (Optional: 4 Ω / 16 Ω customisation)
- Output tubes
- 2 × 300B
- Input tubes
- 2 × 6Zh4 or other types optionally e.g. EL8 / ML6 etc.
- Rectifier tube
- 2 × 6D22S for a warmer/darker tone or 1 × 5C3S for a brighter signature (option)
- Volume control
- ALPS potentiometer (Demograf Audio stepped attenuator optional)
- Internal wiring
- Proprietary “RareCoreFusion” Alloy wire (other options available)
- Special features
- Ground Lift switch (selectable ground loop isolation)
- Mains
- 100 / 120 / 230 V — set at order time, plug to match (NEMA, Schuko, BS 1363 / type G)
- Weight (with power supply)
- From 45 kg / 99 lb
- Dimensions
- From 450 × 450 × 250 mm
Custom options
Stock items are included in the price. Every option is agreed with the atelier before the build starts.
Circuit
- Single-Ended (classic detailed sound) Stock
- Push-Pull (double the output power, a fuller midrange and bass) +50% from $36,200
Input tubes
- 6Zh4 tubes Stock
- EL8 Valvo — for more detailed sound
- AL4 — for heavier bass and midrange
- EF14 — for a more natural midrange, e.g. opera and symphonic music
- ML6 — for more neutral sound
Rectifier tube
- 6D22S — for darker sound Stock
- 5C3S — for brighter sound
- Other Type (on request)
Output tubes
- 300B Stock
- Other similar tubes (on request)
Component upgrades
- Premium Capacitors Suite (Duelund, Mundorf, Miflex etc.)
- Tango, Tamura or Hashimoto transformers and chokes, fitted on request
- Silver AMRG Resistors & Premium Cardas Wiring Kit
- High-End Connectors Suite (e.g. Furutech Top-Tier plugs)
- Solid-core Copper Speaker Connectors
- Premium Solid-core Copper Connectors with Galvanic Gold/Silver Plating
- Vintage Tubes
- Integrated Tone Control Block Module / Filter
- Transformer taps for 4 or 16 Ω (additional winding)
- Bi-wiring integration supplement
- Tri-wiring integration supplement
- One additional Analogue RCA Input
- One additional Analogue XLR Balanced Input
- Demograf Audio High-End Swiss-Stepped Pre-Amp (similar to Stevens & Billington TX-103)
- Variable GAIN Control Module
- 4.4 mm Pentaconn Output Termination
- Dedicated STAX Electrostatic Output Interface
- Fully Balanced XLR Amplifier Architecture
- 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)
- 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
- Protective tube cage (child & pet safety)
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
Which tubes does the Atlas use?
Two 300B output triodes, two 6Zh4 input tubes and, as standard, two 6D22S rectifiers. The 300B is a directly heated triode with a 5 V filament, designed by Western Electric in 1938. A reserve matched pair of output tubes can be ordered with the amplifier.
Which loudspeakers suit a 5 W amplifier?
Loudspeakers from about 93 dB (1 W / 1 m) in a small or medium room. With 95 dB loudspeakers such as our Cassandra MkII, Atlas reaches about 102 dB at 1 m, and the 103 dB Orpheus needs even less of its power. Below about 93 dB, choose the push-pull build or a model with more power.
Which headphones can I use with the Atlas?
Low-impedance dynamic headphones, through the 6.3 mm or the 4-pin XLR output fitted as standard. A 2.5 mm, 3.5 mm, 4.4 mm Pentaconn or dual 3-pin XLR socket, or an electrostatic output, can be added to order: name the headphones you own, and the connector is fixed in your quotation.
Should I order the Atlas single-ended or push-pull?
The stock build is single-ended, for a classic detailed sound. The push-pull build doubles the output power and gives a fuller midrange and bass, for larger or less sensitive loudspeakers; it costs 50% more.
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 Atlas 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.
