The Lehmann Audio PWX is a high‑end upgrade power supply designed specifically for Lehmann Black Cube phono preamps. By replacing the standard plug‑in supply with a powerful, low‑noise external unit, it unlocks the full performance potential of the Black Cube and turns it into a Black Cube SE‑level phono stage.
 
The PWX provides a low‑noise, symmetrical DC voltage of approximately ±15 V, using an over‑dimensioned transformer, high‑quality rectification and advanced series voltage regulation. This cleaner, more stable power delivery reduces interference and hum, resulting in tighter, more authoritative bass, more effortless mids and finer, more open treble. The overall presentation gains in depth, dynamics and transparency, making vinyl playback more engaging and emotionally convincing.
 
Compact and robust, the PWX can be placed close to the turntable and phono stage, keeping cable runs short and minimising potential losses. A screened connection cable and high‑quality Neutrik connectors ensure a secure, low‑noise link between audio section and power supply, while the non‑magnetic aluminium housing with mechanical damping helps to suppress vibration and further protect signal integrity.
 
For owners of the original Black Cube, the PWX offers a simple, plug‑and‑play upgrade path: no internal modification is required on later versions, you simply connect the PWX and benefit from the improved power architecture. This makes the PWX one of the most effective upgrades available for Lehmann phono stages and an ideal choice for anyone wanting to push their Black Cube into true high‑end territory.