Balanced Power Conditioner
A single, very large toroidal transformer gives your system a balanced, galvanically isolated supply that delivers the current surges of powerful amplifiers without voltage dips, and removes mains noise almost entirely.
Developed on 90 years of engineering tradition since 1935, for true connoisseurs of high-end audio and home cinema.
The AUDES ST-1500DC improves sound reproduction with any AV equipment, solid-state and tube alike. The most significant results come with power amplifiers.
In highly dynamic passages (a full orchestra at tutti fortissimo, large ethnic drums, the bass of experimental electronic music, cinematic sound effects) a powerful amplifier must draw current surges of 50–100 A while holding its voltage steady. An ordinary wall socket, connected to the distribution board by long cables, has too high an output impedance to supply that.
The ST-1500DC has a very low output DC resistance, so it supplies high current surges without voltage dips. The secret is a transformer with a very large core and very low magnetic flux density. Your amplifier responds faster to the changing signal, transients improve, especially in the low frequencies, and the system gains dynamic range: instruments and cinematic effects sound more real.
Switches and motor controllers, dimmers, ordinary lighting and the switch-mode power supplies of modern AV equipment all pollute the mains. The ST-1500DC isolates your system from that network and cancels what arrives, while its large core stands ready for every peak your amplifiers demand.
A single, very large toroidal transformer designed by Audes.
A very large core with very low magnetic flux density gives the ST-1500DC a very low output DC resistance, so it supplies amplifier current surges of 50–100 A without voltage dips, something an ordinary wall socket on long cable runs cannot do.
The transformer is designed to act as a low-pass filter with a cut-off at 800 Hz, since mains interference occurs at much higher frequencies. The self-inductance of the large core adds further filtering: its magnetic flux cannot change instantly under a transient disturbance.
High-quality CEE 7/3 sockets are galvanically isolated from the external network, and the transformer carries a reliable electrostatic shield. Its secondary winding is split into two halves around an artificial centre tap connected to the earth clips of each socket, so arriving interference cancels itself out.
The ST-1500DC comes with an integrated DC blocker that keeps DC offset on the mains away from the transformer.
At first switch-on the transformer draws an inrush current of about 20 A as its core magnetises. A special ballast resistor limits this surge, so other equipment on the same electrical network remains unaffected.
Overload protection guards the unit, and thermal protection switches the transformer off at 90 °C, reconnecting it automatically once it has cooled to 75 °C.
Supplies the current surges of powerful amplifiers without voltage dips, for faster amplifier response and better low-frequency transients.
Mains interference sits well above the transformer's 800 Hz cut-off, and the large core's self-inductance resists transient disturbances.
An electrostatic shield and a split secondary winding with an earthed centre tap cancel interference by mutual cancellation.
The transformer is designed to maximise the number of turns in the primary winding, so its power consumption with no load connected is low.
Produces virtually no acoustic noise, for High-End audio systems, home cinemas and showrooms, and for sound recording studios.
European quality with control at every stage of production, from transformer design to final assembly and testing.
Operating environment: below 10 °C, additional heating is required to prevent condensation; above 35 °C, additional external cooling is required.
The ST-1500DC is equipped with five Schuko outlets, all galvanically isolated from the mains and fed by the main balancing transformer. Select a number to see what each part does.
Turns the unit on and off. Built into the inlet module.
10 A inlet, 220–240 VAC, 50/60 Hz, with a T 6.3 A slow-blow fuse. Pair with the Audes Power Cable C13.
Shows the model name and the serial number of the unit.
Five CEE 7/3 sockets fed by the 1500 V∙A balancing transformer, for amplifiers, sources and the rest of your system.
Placement note: keep the ST-1500DC in a space with an ambient temperature of 10–35 °C.
Clean power is not only about extraordinary sound; it transforms the picture too. Free of interference and supply instability, your projector or display reveals its full potential, while cinematic effects gain real dynamic impact.
The ST-1500DC is built around a large Audes toroidal isolation transformer, not transformerless filtering. Its 1500 V∙A core gives every outlet a balanced supply that is galvanically isolated from the mains.
See how the two approaches differ, an honest side-by-side comparison, and why Audes chose the transformer.
For further performance improvement, we recommend combining the ST-1500DC with the specially designed Audes power cable for its 10 A IEC C14 inlet.
Every ST-1500DC ships with a standard power cable in the package; the Audes cable is sold separately.
Every ST-1500DC is engineered and hand-built in Estonia around a transformer designed by Audes, the same in-house expertise behind nine decades of Audes audio.