Audes ST-1500DC Power Conditioner
4 000,00 €
The Audes ST-1500DC is a 1500 VA power conditioner for solid-state and valve AV equipment. Five CEE 7/3 outlets receive power through galvanic isolation, separating them from the external mains supply. An integrated DC blocker stops the DC component of the mains supply. The soft-start circuit limits the transformer’s magnetising inrush current. The unit includes overload protection and automatically resetting thermal protection.
The Audes ST-1500DC power conditioner is a 1500 VA unit designed to supply power to AV equipment. It features an isolation transformer, five CEE 7/3 outlets, and an integrated DC blocker. The model is suitable for both solid-state and valve equipment and is particularly relevant for systems that include power amplifiers.
Power Supply and Filtering Design
The isolation transformer galvanically isolates all five output outlets from the external mains supply. It uses a large core and operates at a low magnetic flux density. Its very low DC output resistance is important when powering amplifiers whose current demand can change rapidly.
An electrostatic shield, together with a mutual cancellation principle, helps suppress interference entering from the mains. The secondary winding is divided into two sections. Its artificial centre tap is connected to the protective earth contacts of each outlet.
The transformer functions as a low-pass filter with a cut-off frequency of 800 Hz. The self-inductance of the large core provides additional filtering during transient interference. An integrated DC blocker stops the DC component of the mains supply before it reaches the transformer.
Connections and Load Selection
The IEC C14 power inlet accepts the supplied cable with an IEC C13 connector. The cable is rated at 10 A and 250 V AC. AV components connect to the five CEE 7/3 outlets.
Each outlet is rated at 16 A and 250 V AC. However, the total load of the conditioner is limited by its 10 A power inlet and 1500 VA rated capacity. The current ratings of the individual outlets must not be added together and treated as the total current available at the same time.
Start-Up and Automatic Protection
When the transformer is switched on, its magnetising inrush current could reach approximately 20 A. The soft-start circuit limits this surge with a ballast resistor. This reduces the effect of start-up on other equipment connected to the same electrical circuit.
Overload protection complements the thermal protection system. Power is disconnected if the transformer reaches 90 °C. Once its temperature falls to 75 °C, the unit automatically reconnects to the mains supply.
The primary winding has a high number of turns, helping to keep no-load energy consumption low. A numerical power-consumption figure is not specified.
Placement and Operating Conditions
The 25.5 kg enclosure requires a strong, stable support. Its dimensions are 155 × 477 × 348.5 mm. Before installation, check the depth of the shelf and allow enough room for cable connections.
The normal ambient temperature range is 10 to 35 °C. At lower temperatures, additional heating is required to prevent condensation. Above 35 °C, additional external cooling is necessary.
Intended Applications
The conditioner is intended for home stereo systems, home cinema installations, demonstration rooms, and recording studios. Its virtually inaudible transformer operation allows it to be positioned close to a listening or recording area.
Technical Specifications
| Device type | Transformer-based power conditioner with galvanic isolation |
|---|---|
| Model | Audes ST-1500DC |
| Rated capacity | 1500 VA |
| Power inlet | IEC C14, 10 A |
| Outputs | 5 × CEE 7/3 |
| Outlet rating | 5 × 16 A / 250 V AC |
| Power cable | 10 A / 250 V AC, IEC C13 connector |
| Transformer shield | Electrostatic |
| Secondary winding | Two sections, with an artificial centre tap connected to the earth contacts of the outlets |
| Filter cut-off frequency | 800 Hz |
| DC blocker | Integrated |
| Start-up | Soft-start circuit with ballast resistor |
| Protection | Overload and overheating protection |
| Thermal shutdown temperature | 90 °C |
| Automatic restart temperature | 75 °C |
| Ambient temperature | 10-35 °C |
| Operating noise | Virtually inaudible |
| Dimensions | 155 (H) × 477 (W) × 348.5 (D) mm |
| Dimensions in inches | 6⅛ (H) × 18⅞ (W) × 13¾ (D) in |
| Weight | 25.5 kg / 57 lb |
FAQ
What type of audio system is this conditioner designed for?
It is designed for solid-state and valve AV equipment. Its 1500 VA capacity is particularly relevant for systems that include a power amplifier.
How do I connect the conditioner to the mains supply?
Connect the IEC C13 connector on the supplied cable to the IEC C14 inlet. AV components are then connected to the five CEE 7/3 outlets.
Can all five outlets supply 16 A at the same time?
No. The 16 A rating applies to each individual outlet. The total load is limited by the 10 A inlet and the unit’s 1500 VA rated capacity.
Where can I place a unit weighing 25.5 kg?
Choose a sturdy shelf or support capable of carrying its weight. Allow sufficient space for cables and any required external cooling.
What happens when the thermal protection is activated?
The transformer is disconnected when it reaches 90 °C. After it cools to 75 °C, power is restored automatically.
