Справочник Пользователя для Micromega CD 30 MM CD30SILVER
Модели
MM CD30SILVER
The heritage of the CD10 and CD20
CD30 is the top model in this CD player range. It shares much of its functionalities with CD10 and
CD20 which are widely recognized as being best sellers in their category due to their excellent sound
quality and first class reliability. At MICROMEGA we set our heart on developing a CD player whose
performances would be exceptional while maintaining unbeatable value for money.
CD20 which are widely recognized as being best sellers in their category due to their excellent sound
quality and first class reliability. At MICROMEGA we set our heart on developing a CD player whose
performances would be exceptional while maintaining unbeatable value for money.
The chassis
Made entirely out of metal, the frame’s role is to provide a stable and rigid base for the CD
mechanism. It also protects the CD’s electronic circuits against external electromagnetic disturbances
and high frequency exposure, which are very common in today’s environment. The aluminum front
panel adds a special touch to all of the models of this range, providing an impression of elegant
soberness, where minimalism and user-friendliness combine harmoniously. The blue 10 character dot
matrix display, driven by MICROMEGA software, displays all necessary information in real time. The
aluminum anodized top cover, which comes in either black or silver, matches the front panel perfectly.
The brushed effect of the front panel gives the product an unrivalled distinctive touch.
mechanism. It also protects the CD’s electronic circuits against external electromagnetic disturbances
and high frequency exposure, which are very common in today’s environment. The aluminum front
panel adds a special touch to all of the models of this range, providing an impression of elegant
soberness, where minimalism and user-friendliness combine harmoniously. The blue 10 character dot
matrix display, driven by MICROMEGA software, displays all necessary information in real time. The
aluminum anodized top cover, which comes in either black or silver, matches the front panel perfectly.
The brushed effect of the front panel gives the product an unrivalled distinctive touch.
The ACTS
®
power supply
Like all the players, CD30 depends on the user’s mains source for its power supply. Unfortunately this
source is increasingly subject to interference, especially since the arrival of switching mode power
supplies used by computers as well as by numerous other consumer electronics goods, for example
TV sets, DVD players, video tape recorders, and satellite devices among others. All these power
supplies, even if according to CE standard, they are supposed to prevent any input or output
disturbance, emit towards the mains high frequency signals likely to disturb the CD’s musical
reproduction. The effect is more significant the more powerful the device is. If that seems paradoxical,
it should be kept in mind that the maximum output signal of a CD player is 2V RMS; therefore the
weakest signal that a CD player must be capable of reproducing is about 30 micro-volts. That gives a
good idea of the scale of what we are talking about. The CD30’s transformer is an R-Core type for the
digital section. These very specific models have very interesting characteristics from the point of view
of mains interference filtering. Contrary to toroidal transformers, which have a very broad bandwidth,
R-Core transformers, due to the way there are made, have a very narrow bandwidth. This makes them
the ideal choice when the current requirement is low. The digital power supply provides the necessary
current to the drive mechanics, the servo and decoding circuits and all of the user interface section. To
generate the specific voltage to the VFD display used in CD30, we employed a specific technique
making it possible to isolate the power supply from this particular element. Purists are well familiar with
the negative effects this has on very high level musical reproduction. In addition, linear regulators with
high power supply rejection guarantee a perfectly noise-free power supply for all of the digital
elements. For the analog section, CD30 benefits from the latest MICROMEGA ACTS
source is increasingly subject to interference, especially since the arrival of switching mode power
supplies used by computers as well as by numerous other consumer electronics goods, for example
TV sets, DVD players, video tape recorders, and satellite devices among others. All these power
supplies, even if according to CE standard, they are supposed to prevent any input or output
disturbance, emit towards the mains high frequency signals likely to disturb the CD’s musical
reproduction. The effect is more significant the more powerful the device is. If that seems paradoxical,
it should be kept in mind that the maximum output signal of a CD player is 2V RMS; therefore the
weakest signal that a CD player must be capable of reproducing is about 30 micro-volts. That gives a
good idea of the scale of what we are talking about. The CD30’s transformer is an R-Core type for the
digital section. These very specific models have very interesting characteristics from the point of view
of mains interference filtering. Contrary to toroidal transformers, which have a very broad bandwidth,
R-Core transformers, due to the way there are made, have a very narrow bandwidth. This makes them
the ideal choice when the current requirement is low. The digital power supply provides the necessary
current to the drive mechanics, the servo and decoding circuits and all of the user interface section. To
generate the specific voltage to the VFD display used in CD30, we employed a specific technique
making it possible to isolate the power supply from this particular element. Purists are well familiar with
the negative effects this has on very high level musical reproduction. In addition, linear regulators with
high power supply rejection guarantee a perfectly noise-free power supply for all of the digital
elements. For the analog section, CD30 benefits from the latest MICROMEGA ACTS
®
power supply
technology. A specific leaflet has been produced to cover this rather complex subject. However it is
important to put things back into perspective to try to understand why such a power supply is so
important and brings so much listening benefit. The maximum output voltage at full scale for most CD
players is 2V RMS. CD30 follows this rule. At the nominal resolution of 16 bits the player should be
able to reproduce signals with amplitude as small as 30µV. This is VERY small and gives immediately
the perspective of what we are trying to achieve. Also, the quality of the mains supply is getting worse
every day and things are not going to improve as we are already transmitting data like Internet or
Digital TV through the mains supply lines. These techniques will be exploited on a much larger scale in
the near future. For the music lover or the audio fanatic this is a shame and creates tremendous
problems with equipment where this aspect has NOT been taken into account. We strongly believe
that the ACTS
important to put things back into perspective to try to understand why such a power supply is so
important and brings so much listening benefit. The maximum output voltage at full scale for most CD
players is 2V RMS. CD30 follows this rule. At the nominal resolution of 16 bits the player should be
able to reproduce signals with amplitude as small as 30µV. This is VERY small and gives immediately
the perspective of what we are trying to achieve. Also, the quality of the mains supply is getting worse
every day and things are not going to improve as we are already transmitting data like Internet or
Digital TV through the mains supply lines. These techniques will be exploited on a much larger scale in
the near future. For the music lover or the audio fanatic this is a shame and creates tremendous
problems with equipment where this aspect has NOT been taken into account. We strongly believe
that the ACTS
®
technology will prove its value over the years and allow audiophiles to enjoy music for
many more years.