Eclipse - Fujitsu Ten AVN5495 用户手册

Audio

Focus
Generates virtual speakers that create a front-firing, 
higher-positioned soundfield.

TruBass
Generates a virtual subwoofer 
for satisfying low frequency 
reinforcement.

Circle Surround
Multichannel surround 
sound is generated 
from any audio 
source.

This technology enhances in-car listening 
enjoyment with a powerful combination of 
three functions. Circle Surround generates 
surround sound from any audio source such 
as CDs, MP3s, WMA files and radio broadcasts 
with just four speakers. Focus raises the stereo 
soundfield, making the sound appear to be 
coming from directly in front at ear level. 
Its use complements surround sound to create 
a rich, enveloping soundfield. TruBass is 
technology based on psychoacoustics and 
scientific knowledge of the human hearing 
system to generate bass sounds extending 
lower than a small speaker’s response so that a 
subwoofer is not required.

High-end audio products usually are engineered 
to have preamp outputs that have high voltages 
along with low impedances. These 
characteristics are desirable from an audio 
electronics point of view as they enable driving 
downstream amplifiers optimally to reap other 
benefits such as a higher signal-to-noise ratio 
and increased dynamics. Each CD receiver 
ensures any connected external amplifier will 
deliver optimal performance.

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This sophisticated equalization method is the 
best for achieving a smooth, well-balanced in-
car system frequency response that 
overcomes the frequency peaks and dips often 
encountered in automobile environments due 
to the combination of hard, reflective surfaces 
and soft, absorbing surfaces. Parametric EQ 
allows selecting a frequency band as well as 
bandwidth for an even system response.

An additional EQ method  to 
adjust the tonal characteristics 
of program material to suit 
user preferences.

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MOSFET devices are used for power 
amplification due to their desirable 
characteristics — drawing less current and 
requiring less power — as well as providing a 
more natural sound.

Digital music files in formats such as MP3, 
WMA and ATRAC3 lose harmonic data during 
encoding because compression is applied. 
Multi-Harmonizer restores the lost harmonic 
data, allowing files to sound much better.

Electronic delay lines make sure the sounds 
from all the speaker units arrive at the listener’s 
ears simultaneously for a much more natural 
sound with improved imaging. 

To create a smoother system response in a multi 
speaker system, the frequency point and slope 
can be tweaked for each speaker.

Digital circuits benefit from signals staying in 
the digital domain as long as possible, helping 
to minimize distortion and noise. All signal 
processing in the CD Receivers remains 
entirely in the digital domain until the last stage 
prior to power amplification. The final level of 
audio performance also relies on high-
performance digital to analog conversion. As 
this process greatly influences final sound 
quality, a proprietary DAC is utilized so 
distortion is minimized and S/N ratio stays 
high. 

Featured in the CD8455 and CD8445, this single 
sophisticated chip contains the Parametric EQ, 
Multi-Harmonizer, Time Alignment and 
Crossover functions as well as level.

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When connecting external sources, the 
AUX input has adjustable sensitivity for 
perfect matching to cut extraneous noise 
and improve S/N ratios.