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REVIEWS & TECHNOLOGY
AUDIOLAB DC BLOCK
The DC Block
has been designed to improve the quality of AC electricity that feeds our audio
and AV systems.
Mains electricity has a
fundamental effect on the audio signal as it travels through the system from the
source to the amplifier and speakers, as many online casino players are aware
of. Therefore, the DC blocker was designed to improve the quality of the AC
power that powers the audio and AV systems of norwegian casinos players. The power supply in a typical
residential building is subject to interference caused by a number of problems,
causing the AC waveform to be distorted before it reaches every component,
which online casino players can easily get rid of by installing a DC blocker.
Mains
electricity has a fundamental influence on the audio signal as it passes
through a system, from source to amp to speakers. 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. This creates noise in
the audio signal, which degrades sound quality – a situation that continues to
worsen as the electrical devices we use in our homes proliferate.
DC mains supply
One common
issue is ‘DC on the mains’ – a problem well known to affect the performance of
audio equipment, especially amplifiers. In theory, the mains electricity we
obtain from the sockets in our homes should be pure AC, with a perfectly
symmetrical sine wave alternating between positive and negative phases.
However, the presence of ‘asymmetrical loads’ – myriad household devices that
use the AC energy available in the mains cycle unevenly, from dimmer switches
to kitchen appliances to computer power supplies – causes the waveform to
become offset, resulting in the presence of DC voltage on the AC supply.
DC Voltage
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.
By blocking,
or cancelling, DC voltage found within the AC mains supply, the Audiolab DC
Block corrects the DC offset and rebalances the mains sine wave.
But tackling ‘DC on the mains’ 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).
Simple setup
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.
Power
Requirement: |
100-240V
~ 50-60Hz |
Peak
Load : |
600VA |
Audio
Power Amplifier Compatibility |
<2x150W
or <1x 300W |
Dimensions
(W x H x D): |
113
x 59 x 140(mm) |
Weight
(net): |
0.7
kg |