Complete systems: source, amplifier and loudspeakers voiced together
High‑End Audio Systems
Systems our clients have built around Demograf Audio components, photographed in their own listening rooms. Open a system to see the photographs and the components it uses.
The “Adelia” system
Demograf Audio Cassandra MkII floorstanding loudspeakers, the Neptune class-D amplifier and the Prometheus programmable-logic DAC. Photographed in the owner’s listening room.
System Components
- Demograf Audio Cassandra MkII Floorstanding Loudspeaker
- Demograf Audio Neptune Class-D Amplifier
- Demograf Audio Prometheus Programmable-Logic DAC
Download the brochurePDF · EN · 1.1 MB
Cassandra MkII
Built around Cassandra
Demograf Audio Cassandra MkII floorstanding loudspeakers, driven by the Neptune class-D amplifier.
Digital source
Prometheus
The Prometheus programmable-logic DAC is the digital source.
The room
Electronics on a wooden rack
Photographed in the owner’s listening room, with the electronics on a wooden rack beside the loudspeakers.
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Cassandra MkII
Loudspeaker
Time-aligned two-way floorstanding loudspeaker with BEAG HX-302 cobalt drivers, 95 dB, down to 28 Hz
Prometheus
DAC
Programmable-logic DAC with a window filter — native DSD1024 and PCM 32/768
The “Ariadne” system
Demograf Audio Cassandra MkII floorstanding loudspeakers with the Helios MkII G-811 tube amplifier, the Hector transformer preamplifier and the Ulanor PC streamer. Photographed in the owner’s listening room.
System Components
- Demograf Audio Cassandra MkII Floorstanding Loudspeaker
- Demograf Audio Helios MkII G-811 Tube Amplifier
- Demograf Audio Hector Transformer Preamplifier
- Demograf Audio Ulanor PC Streamer
Download the brochurePDF · EN · 1.8 MB
Cassandra MkII
A pair of Cassandra
Demograf Audio Cassandra MkII floorstanding loudspeakers at the heart of the system.
Tube amplification
Helios MkII
The Helios MkII tube amplifier drives the loudspeakers.
Volume and source
Hector and Ulanor
The Hector transformer preamplifier sets the volume, and the Ulanor PC streamer serves as the source.
The room
Two wooden racks
Photographed in the owner’s listening room, with the components on two wooden racks.
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Cassandra MkII
Loudspeaker
Time-aligned two-way floorstanding loudspeaker with BEAG HX-302 cobalt drivers, 95 dB, down to 28 Hz
Helios MkII
Tube amplifier
Class A single-ended integrated amplifier on G-811 triodes, 15 W
Hector
Preamplifier
A transformer-volume preamplifier in two versions: tube or solid-state
Ulanor
Fanless audio computer with a Pinkfaun PCIe bridge and linear power supply — up to DSD1024
The “Thalia” system
Electrostatic loudspeakers with the Demograf Audio Argo EL34 tube amplifier, the Hyperion DAC and the Charon master clock. Set up in the owner’s home.
System Components
- Electrostatic Loudspeakers
- Demograf Audio Argo EL34 Tube Amplifier
- Demograf Audio Hyperion CS4397 DAC
- Demograf Audio Charon Master Clock
Download the brochurePDF · EN · 1.5 MB
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Hyperion
DAC
Delta-sigma DAC on the Cirrus Logic CS4397 with a solid-state or tube output stage
Charon
Master clock
External master clock — solid-state or tube buffer, galvanically isolated, BNC outputs
The “Calliope” system
Demograf Audio Orpheus three-way loudspeakers with the Tantal Senior 4E27 tube amplifier, the Hector preamplifier, the Prometheus programmable-logic DAC and the Charon master clock. Photographed in the owner’s listening room.
System Components
- Demograf Audio Hector Transformer Preamplifier
- Demograf Audio Orpheus Three-Way Loudspeaker
- Demograf Audio Tantal Senior 4E27 Tube Amplifier
- Demograf Audio Prometheus Programmable-Logic DAC
- Demograf Audio Charon Master Clock
Download the brochurePDF · EN · 1.7 MB
Orpheus AER
Built around a pair of Orpheus
Demograf Audio Orpheus three-way loudspeakers, with a diffuser panel between them, in the owner’s curtained listening room.
Tube amplification
Power and volume
The Tantal Senior 4E27 tube amplifier drives the loudspeakers, with the Hector transformer preamplifier for volume control.
Digital source
Prometheus, clocked by Charon
The Prometheus programmable-logic DAC is the digital source, clocked by the Charon master clock.
The room
One room, one system
Photographed in the owner’s own listening room: the loudspeakers, the amplification and the digital source, every one of them from Demograf Audio.
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Hector
Preamplifier
A transformer-volume preamplifier in two versions: tube or solid-state
Orpheus
Loudspeaker
Three-way floor-standing loudspeaker with AER drivers and a crossover, 103 dB
Tantal Senior
Tube amplifier
Class A single-ended amplifier on tantalum 4E27 tubes, 30 W
Prometheus
DAC
Programmable-logic DAC with a window filter — native DSD1024 and PCM 32/768
Charon
Master clock
External master clock — solid-state or tube buffer, galvanically isolated, BNC outputs
The “Ophelia” system
Demograf Audio Cassandra MkII floorstanding loudspeakers with the Hector transformer preamplifier and the Reference DAC, built on a classic DAC chip. Photographed in the owner’s listening room.
System Components
- Demograf Audio Cassandra MkII Floorstanding Loudspeaker
- Demograf Audio Hector Transformer Preamplifier
- Demograf Audio Reference DAC (classic-chip DAC)
Download the brochurePDF · EN · 1.9 MB
Cassandra MkII
Between two Cassandra
Demograf Audio Cassandra MkII floorstanding loudspeakers at the heart of the system.
Volume and source
Hector and the Reference DAC
The Hector transformer preamplifier sets the volume; the Reference DAC, built on a classic DAC chip, is the digital source.
The room
A wooden rack between the loudspeakers
Photographed in the owner’s listening room, with the electronics on a wooden rack between the loudspeakers.
Explore the system
Cassandra MkII
Loudspeaker
Time-aligned two-way floorstanding loudspeaker with BEAG HX-302 cobalt drivers, 95 dB, down to 28 Hz
Hector
Preamplifier
A transformer-volume preamplifier in two versions: tube or solid-state
Reference Tube DAC
DAC
DAC with a solid-state output stage, tube stage optional — NOS multibit TDA1540, TDA1541, PCM63 and PCM1704, or the bitstream TDA1547
The “Adelia” system
Demograf Audio Cassandra MkII floorstanding loudspeakers, the Neptune class-D amplifier and the Prometheus programmable-logic DAC. Photographed in the owner’s listening room.
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The “Ariadne” system
Demograf Audio Cassandra MkII floorstanding loudspeakers with the Helios MkII G-811 tube amplifier, the Hector transformer preamplifier and the Ulanor PC streamer. Photographed in the owner’s listening room.
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The “Thalia” system
Electrostatic loudspeakers with the Demograf Audio Argo EL34 tube amplifier, the Hyperion DAC and the Charon master clock. Set up in the owner’s home.
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The “Calliope” system
Demograf Audio Orpheus three-way loudspeakers with the Tantal Senior 4E27 tube amplifier, the Hector preamplifier, the Prometheus programmable-logic DAC and the Charon master clock. Photographed in the owner’s listening room.
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The “Ophelia” system
Demograf Audio Cassandra MkII floorstanding loudspeakers with the Hector transformer preamplifier and the Reference DAC, built on a classic DAC chip. Photographed in the owner’s listening room.
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