Tantal Senior
from $56,800 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.
Tantalum anodes
Vintage 4E27 pentodes
Each output tube is a vintage 4E27 with a pure tantalum anode, individually selected.
Sound
Soft, natural, with authority
There is no negative feedback. The sound is soft and natural, with a relaxed scale and a bass that has real authority.
Two monoblocks
Monoblocks and their supply
As standard it is built as two monoblocks fed by an external power supply with kenotrons, galvanic isolation, power transformers and chokes; an integrated single-chassis version is available.
Transformer volume control
Volume set by a transformer
The volume is set by a transformer attenuator on an Elma switch; custom-wound M034 interstage and M062 output transformers set the character of the circuit.
Tantal Senior
Numbered unit — Opus No. on the nameplate
- Model
- Class A single-ended amplifier on tantalum 4E27 tubes, 30 W
- In brief
- 30 W per channel in single-ended Class A, from 4E27 output tubes with pure tantalum anodes, made in the 1930s–1940s.
- Queue deposit
- 50% · from $28,400
- 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 $85,100 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 Dynasty collection
- Music it suits
- Orchestral · opera · large-scale jazz · rock
- Compared with
-
- Tantal (3C24)
From the atelier
Tantal Senior is the high-power amplifier of the Maestro series: 30 W per channel in single-ended Class A from 4E27 output tubes with pure tantalum anodes, made in the 1930s–1940s. There is no negative feedback, and the volume is set by a transformer attenuator on an Elma switch. The sound is soft and natural, with a relaxed scale and a bass that has real authority. As standard it is built as two monoblocks; an integrated single-chassis version is available. A STAX-type electrostatic headphone output is built in.
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.
Lid closedLid openDemograf Audio Tantal Senior Universal Tube Amplifier
Pure Class A. 30 W into 8 Ω. EF55 Mullard tubes. Duelund Capacitors.
An external power supply with four 6D22S kenotrons, galvanic isolation, power transformers and chokes feeds the amplifier. Custom-wound M034 interstage and M062 output transformers set the character of the circuit.
- Output: 2 × 4E27 tantalum pentodes, individually selected
- Driver: 2 × EF55; input: 2 × 6Zh4
- Fixed bias, no negative feedback
- Transformer volume control with Elma attenuator
| Component | Manufacturer | Country of origin |
|---|---|---|
| Output tubes 4E27 (tantalum anode) | Vintage, 1930s–1940s, selected | US / EU / UK (NOS) / Other Vintage |
| Driver tubes EF55 | Vintage, selected | 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 |
| Interstage M034 / output M062 transformers | Demograf Audio (custom-wound) | or analog by Hashimoto / Tango / Tamura |
| Attenuator switch | Elma | Switzerland |
| 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 · 0.7 MB
Measured on the stock configuration; options may change the figures.
- Use
- Universal: loudspeakers and headphones
- Output power
- 30 W per channel at 8 Ω (4 Ω / 16 Ω winding available on request)
- Series
- Maestro Series
- Amplifier class
- Pure Class A
- Channels
- 2 (Stereo Layout)
- Input connections
- Analogue RCA (Optional: Balanced XLR Stage)
- Headphone outputs
- 6.3 mm TRS, XLR 4-pin, STAX type (Optional: 4.4 mm Pentaconn etc.)
- Speaker outputs
- Heavy-duty Demograf Audio speaker binding posts
- Load impedance
- 8 Ω (Customisable to 4 Ω or 16 Ω via options)
- Output tubes
- 2 × vintage tantalum 4E27 pentodes (1930s–1940s production, individually selected)
- Driver tubes
- 2 × EF55 (M034 Anode-Filament Transformer Stage)
- Input tubes
- 2 × 6Zh4
- Rectifier tubes
- 4 × 6D22S
- Volume control
- Transformer volume control (TVC) with an Elma stepped switch
- Internal wiring
- Proprietary “RareCoreFusion” Alloy wire (other options available)
- Mains
- 100 / 120 / 230 V — set at order time, plug to match (NEMA, Schuko, BS 1363 / type G)
- Weight (with power supply)
- From 75 kg / 165 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 Stock
- Push-pull — built to order +50% from $85,100
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
Amplifier type
- 2 Monoblocks Stock
- Integrated Amplifier
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
- 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
- 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 Tantal Senior use?
The output tubes are vintage 4E27 pentodes with tantalum anodes, each pair measured and matched for emission and distortion. Drivers are EF55, input tubes 6Zh4, rectifiers 6D22S. A reserve matched pair of output tubes can be ordered with the amplifier.
How is the Tantal Senior 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 Tantal Senior 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.
