Audes ST-900DC

Compact DC-Blocking Power Conditioner for High-End Source Components

The Audes ST-900DC is the most compact member of Audes’ ST-series power conditioners — designed to deliver clean, stable, DC-free power to sensitive audio components such as DACs, streamers, phono stages, preamplifiers, and small integrated amplifiers.

Hand-assembled in Europe and built around a high-quality toroidal transformer with an oversized core, the ST-900DC filters noise, suppresses DC offset, reduces transformer hum, and improves overall system refinement — all without restricting dynamic flow.

It is the ideal entry into the Audes power ecosystem for audiophiles seeking a significant power-quality improvement in a discreet and elegant chassis.

Why Clean Power Matters — Especially for Source Components

Even small amounts of DC offset or mains contamination can cause:

• transformer hum or vibration

• elevated noise floor

• jitter or digital harshness

• unstable dynamics

• reduced bass precision

• grainy or sharp treble

The ST-900DC integrates a high-quality DC blocker and transformer-based filtering to supply your sources with silent, symmetrical power — letting them perform at their best.

Key Technical Advantages

🔹 High-Quality Toroidal Transformer (Single Large-Core Design)

Based on verified data, the ST-900DC uses one toroidal transformer, custom-wound to deliver:

• clean mains isolation

• low electromagnetic leakage

• stable AC waveform

• minimal mechanical hum

• high efficiency and low heat

This transformer-centric design is responsible for the ST-series’ natural, uncompressed sonic character.

📝 Unlike the TT-series, there is no evidence of dual-transformer architecture in the ST-900DC.
All credible sources describe a single, oversized toroidal transformer.

🔹 Excellent for Low- and Mid-Current Audiophile Gear

The ST-900DC is rated at 900 VA, making it ideal for:

Perfect Matches

• DACs (Wattson, Chord, Linn, Weiss…)

• Streamers (Linn, Wattson, Lumin, Auralic, Bluesound)

• Preamplifiers

• Phono stages

• Turntable PSU’s (Radikal, Lingo, Rega PSU…)

• Network switches & digital transports

• Small integrated amplifiers

Not recommended for

• large power amplifiers

• big Class-A amps

• active loudspeakers requiring high current
  (Use ST-1500DC or ST-3000DC instead.)

DC-Blocking for Silent Transformers

The built-in DC blocker suppresses DC offset — eliminating common issues such as:

• buzzing transformers

• mechanical vibration

• channel imbalance

• harsh highs or hardness in the upper midrange

This results in a more relaxed, refined sound.

Improved Clarity, Dynamics & Soundstage

Based on verified user feedback, the ST-900DC typically improves:

• soundstage depth

• microdetail retrieval

• treble smoothness

• midrange transparency

• bass articulation

• blackness of background

Digital sources in particular tend to sound cleaner, more stable and “more analog”.

Hand-Built in Europe

As with all Audes power conditioners, the ST-900DC is handcrafted in Europe and features:

• custom toroidal transformer

• robust grounding scheme

• high-quality connectors

• solid metal chassis

• carefully optimized internal wiring

• passive cooling (no fans, no noise)

The result is a long-life, maintenance-free power conditioner engineered for years of stable performance.

Audes at Authentic High End Brussels — Evidence-Based Advice

We remain honest and realistic:
At Authentic High End, we were historically sceptical about power conditioners.

After Steve performed extended listening tests, however, the ST-series — including the ST-900DC — consistently delivered real, measurable improvements in many systems.

BUT:
The effect varies depending on your electrical environment.

👉 This is why we strongly recommend:
Test the ST-900DC in your own system, in your own home.
We look forward to hearing your results.

Why Choose the ST-900DC at Authentic High End Brussels?

• Official Audes dealer

• Real-world evaluations by Steve

• Transparent, honest guidance

• Perfect for source-based systems

• Demo units available for home testing

• Fine-tuned setup help by Steve & High End Mary

More info: Audes ST-900DC