The use of ST-1500 with AV equipment, including solid-state and tube devices, improves the quality of sound reproduction. The most significant results are achieved when the power conditioner is used with power amplifiers. In highly dynamic parts of an audio track (e.g., tutti fortissimo of a full symphony orchestra, sounds of large ethnic drums, bass sections of experimental electronic music, cinematic SFX), a powerful amplifier must draw significant current surges from a power supply, which can reach magnitudes of 50-100 A, while maintaining voltage levels without dips. An ordinary household outlet, connected to a distribution board via long electrical cables, is unable to provide such current levels due to its relatively high output impedance. The ST-1500 has a very low output DC resistance, so it can easily deliver high current surges without voltage sags. This is achieved through the use of a transformer with a very large core, resulting in a very low magnetic flux density. In turn, the response time of a power amplifier to a changing audio signal is reduced, which benefits the reproduction of transients, especially in lower frequency bands. An audio reproduction system exhibits a wider dynamic range, leading to more realistic-sounding musical instruments and cinematic SFX.

Another problem with powering high-quality equipment is noise in electrical networks. This occurs when switches and controllers of electric motors, dimmers and normal lighting, as well as switching power supplies of modern AV equipment are used nearby. High-quality CEE 7/3 sockets are galvanically isolated from an external electrical network. The transformer is equipped with reliable electrostatic shielding. Unilateral electrical interference is counteracted according to a principle of mutual cancellation. The secondary winding of the transformer is divided into two halves and has an artificial center tap, which is connected to the earth clips of each socket outlet. The ST-1500 transformer was designed for use as a low-pass filter with a cut-off at 800 Hz, as all electrical network disturbances occur at much higher frequencies. Secondly, the filter effect is caused by the self-inductance of a very large core, which prevents the magnetic flux from changing instantaneously under transient disturbance. All the above technical aspects enable almost complete removal of electrical network noise and reliable high-quality power supply to audio equipment.

When the power conditioner is first switched on, the transformer is subject to an inrush current of approximately 20 A during the magnetization of the transformer core. This implements a soft start in the power conditioner. A special ballast resistor limits the current surge so that other electrical devices connected to the same electrical network remain unaffected.

Audes Power Conditioners have overload protection and thermal protection, which switches off the transformer if the transformer temperature reaches 90 °C. As soon as the temperature drops to 75 °C, the device automatically reconnects to the electrical network. The transformer has been designed to maximize the number of turns in the primary winding. For this reason, the power consumption of the ST-1500 under no-load conditions is low.

The ST-1500 generates virtually no acoustic noise, which allows its use not only with domestic high-end audio equipment, home cinemas and showrooms, but also in sound recording studios.

The Audes proprietary DC Blocker is installed in the ST-900 DC, ST-1500, ST-3000 and ST-5000 models. This serves to eliminate hum from DC components in the mains. It is an in-house development that works sound-neutrally and thus does not diminish the sound gain from the power conditioner.

Nominal Power 1500 VA

Inlet 10 A Inlet IEC C14

Outlet 4 × 16 A/250 VAC Socket CEE 7/3

Power Supply Cable10 A/250 VAC Plug IEC C13

Dimensions (mm)155 H × 477 W × 347 D

Dimensions (inches)61⁄8" H × 187⁄8" W × 73⁄4" D

Weight 25.5 kg/57 lbs

Audes LLC OÜ
A. H. Tammsaare St. 6, Pae St. 3a, Jöhvi, 41533 Ida-Viru, EST
service@audes.ee
https://audes.ee/
+372 339 5651