Source: Press Release, Last Accessed: 2021/05/31

Audiolab recently released their first product designed to improve the quality of AC electricity fed to audio and AV systems, the dual-action DC Block. The new device removes RFI/EMI noise whilst banishing “DC on the mains” to deliver pure, re-balanced power to audio and AV system components.
The mains supply in a typical dwelling is subject to interference induced by a range of issues, causing the AC waveform to distort before it reaches each component. One common issue is “DC on the mains” – a problem well known to affect the performance of audio equipment, especially amplifiers. The AC transformers commonly used in home audio equipment cannot tolerate the presence of significant levels of DC voltage without being compromised. Less than 500mV of DC – typical in an average household electricity supply – can be sufficient to cause toroidal transformers of the kind often found in amplifiers to become saturated, which adversely affects sonic performance and may cause audible mechanical vibration, Audiolab says.
By blocking, or canceling, DC voltage found within the AC mains supply, the Audiolab DC Block corrects the DC offset and re-balances the mains sine wave. But this is not the only benefit delivered by this dual-action device – it also contains a high-performance audio class filtering circuit that removes RFI/EMI contaminants from the mains supply. This is effective in reducing both differential-mode noise (exacerbated by cheap switch-mode power supplies used by many home appliances) and common-mode noise (aggravated by airborne interference from phones, Wi-Fi networks and Bluetooth).
Using the DC Block is simple – plug its output into the IEC power socket of an audio/AV component, then connect its input to a mains socket (both cables are provided). The device is designed for use with a single audio or AV system component – Audiolab recommends that if one DC Block is purchased, it should be used with the integrated amp or power amp component within the user’s system to obtain the greatest benefit from the DC-blocking technology. If desired, further units may be purchased to use with other electronics in the system – preamps, source components and so on. With each additional DC Block, further incremental improvements in overall system performance can be expected, the company says.

For more information: https://www.audiolab.co.uk/

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