The Audiolab DC BLOCK is a mains conditioner designed to enhance the performance of audio equipment by addressing common power supply issues. Its primary function is to filter out high-frequency noise and block DC components present on the mains power line, which can negatively impact the sound quality of connected audio devices.

Function Description

The DC BLOCK operates as a sophisticated filter for your mains power supply. It incorporates a high-frequency filter that actively suppresses noise on the power line. This noise, often generated by other household appliances or electrical interference, can manifest as unwanted hums, buzzes, or a general lack of clarity in audio reproduction. By effectively removing these high-frequency disturbances, the DC BLOCK aims to provide a cleaner, more stable power source for your audio components, allowing them to perform at their best.

In addition to high-frequency filtering, a key feature of the DC BLOCK is its ability to block DC (Direct Current) on the mains power line. While AC (Alternating Current) is the standard for household power, small amounts of DC can sometimes be present due to various factors in the electrical grid. This DC offset can cause issues in audio equipment, particularly in amplifiers, leading to mechanical hum from transformers and potentially affecting their operational efficiency and lifespan. By eliminating this DC component, the DC BLOCK helps to ensure that your audio equipment receives a pure AC supply, reducing transformer hum and allowing the connected devices to operate more silently and effectively.

Usage Features

The Audiolab DC BLOCK is designed for straightforward integration into an existing audio system. Before connecting, it is crucial to ensure that the ON/OFF switch on the unit you intend to power is in the 'off' position.

To connect the DC BLOCK, you first use the supplied IEC C14 to C13 jumper cord. This cord connects the output of the DC BLOCK to the input of the audio unit you wish to power, such as an Audiolab power amplifier. This establishes the filtered power path to your audio component.

Next, the supplied IEC mains power cord is used to connect the input of the DC BLOCK to a standard AC supply outlet. This brings the raw mains power into the DC BLOCK for conditioning.

The DC BLOCK is specifically engineered for audio equipment with variable power requirements, capable of handling up to a maximum peak load. It is important to note that it should not be used to power permanent high-power loads like heaters or similar appliances, as its design is optimized for the dynamic power demands of audio components. This ensures that the DC BLOCK can effectively manage the power delivery to your sensitive audio gear without being overloaded by unsuitable devices.

The product is designed for use in moderate to tropical climates, indicating its suitability for a wide range of environmental conditions.

Maintenance Features

Maintaining the Audiolab DC BLOCK primarily involves adhering to general electrical safety guidelines and proper handling.

For cleaning, only a dry cloth should be used. It is important to avoid using any liquids, as the apparatus should not be exposed to dripping or splashing. This also means that objects filled with liquids, such as vases, should not be placed on the unit.

The DC BLOCK does not require user-accessible ventilation openings, and therefore, no specific maintenance is needed in this regard. However, it should not be installed in confined or built-in spaces, and adequate ventilation in an open space should be maintained. Ventilation should not be impeded by covering the unit with items like newspapers, table-cloths, or curtains.

In the rare event of a fuse breaking, the mains supply fuse on the rear panel is accessible once the IEC mains plug has been removed. Before replacing the fuse, it is essential to check for any obvious cause of the breakage. The fuse must be replaced with one of the correct rating and type, specifically a 100-240V T4AL Slow Blow fuse. This ensures continued safe operation and protection of the unit.

The apparatus should be unplugged during lightning storms or when left unused for long periods to prevent potential damage.

All servicing, beyond basic fuse replacement, must be referred to qualified service personnel. This includes situations where the apparatus has been damaged in any way (e.g., power supply cord or plug damage, liquid spills, objects falling into the apparatus, exposure to rain or moisture, abnormal operation, or if it has been dropped). Attempting unauthorized servicing can be dangerous and may void the warranty.

The DC BLOCK is a Class II or double insulated electrical appliance, meaning it has been designed in such a way that it does not require a safety connection to electrical earth. This design simplifies installation and enhances safety.

For product warranty registration, users can scan a QR code using a smartphone device to register online. This registration is crucial for qualifying for the extended 3-year warranty, which is applicable to items purchased from January 1st, 2021, onwards. Registration must be completed within ninety calendar days from the date of purchase. Proof of purchase with the date, model, and authorized dealer details is required for any warranty claims. The warranty is non-transferable and valid only in the original country of purchase.

In case of a fault, the product should be packed correctly, preferably in its original carton, and shipped via an insured, trackable courier service. Contacting the authorized dealer, distributor, or service center for return details and instructions is necessary before dispatching the goods. Unsuitable packaging may void the warranty. The owner is responsible for return shipping charges if no fault is found or no repair is necessary.

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