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The exciting force feeling and beautifully lingering charm. Power crowned with "f"
meaning supremacy.
ODNF circuit concept diagram
INPUT OUTPUT
Main amplifier
Sub-
amplifierDistortion
elements for
canceling
* Main amplifier: Non-NFB amplifier
* Sub-amplifier: Only the differential elements of input and output and output waveform are amplified (Only differential
signal was amplifier)
The power of sound that pursues the boom of music full of passion and could reach everywhere. The essence of M-8f is to supply a grandeur music
feeling which could bring a overwhelming scale as large as 250W+250W/8Ω of effective output stereo and a instantaneous maximum output of 1KW/2
Ω. But the output scale of power amplifier is not only for increasing the volume. The real value of M-8f also lies in its power quality that could guarantee
the tiny nuance hidden in the background of music be felt in case of small sound volume. With the installing of innovative ODNF circuit, the expression
power of music is marching to a new field. It is an unparalleled power amplifier which could obtain broader dynamic range of new generations sources,
as well as could extremely tap the potential of overall speakers.
The drivability with a boundless big output capacity as large as
250W+250W
The boundless driving ability of M-8f could
be felt in its overwhelming reproduction power
of full orchestra at the climax, as well as in the
aesthetic feeling of lingering charm when silence
reigns supreme The effective output stereo is
2 5 0 W + 2 5 0 W / 8 Ω , B T L m o n a u r a l , 7 5 0 W / 8 Ω
, still, the instantaneous maximum output is
1KW when the impedance is 2Ω It is not only a
boast about the power scale, but also achieved a
high-grade reproduction of the music
Heat sink and power block
The innovative ODNF circuit intimate to the life of music
The colorful sound of violin and grand sound color of viola are melted in the ensemble
of rich stringed music Only by clearly distinguishing the existence feeling of varieties of
music instruments, could the rich music interests be gained In freshly reproducing the nuance
of each sound, the speed of initial slewing rate which could catch the instant when the sound
being generated is pursued In addition, for gaining the reproduction of more natural music,
it is necessary to realize the smooth connection unified the sound colors in the overall bands
from low end to the high end This is the ODNF circuit that pursues the high-level music
reproduction and was developed by fundamentally restudying the relations between music
signal and the distortion Luxman has, first of all, developed the super-broad band, high slewing rate, lower
distortion circuit which needs no phase correction because of the amplification circuit of
music signal Thus the phase correction that could not be avoided in the former negative feed
back circuit was cancelled In addition, the attention was paid to the existence of NFB For
eliminating the distortion occurred to music signal, the NFB method so far has brought the limit
of band and the shortage of music information volume Here, only the distorted elements from
output are fed back to the final section of amplification circuit, and only the distorted elements are removed form the waveform of output By separating the NFB method from the music signal, the high speed of initial slewing rate at the
moment when sound
was instantaneously generated and a super-broad band could be gained Furthermore,
the DC servo amplifier used for the super-lower band control which has become the factor
offering non-natural coloration to the lower band in NFB circuit was removed Thus, the
reproduction of natural music unified the sound colors in the whole bands could be realized
The high inertia power source excitedly responding to the instant sound
Enjoying the orchestral music of R Strauss is like something enjoying the dazzled
drama of sounds The earth-shaking great sound lasts for only a moment, then falls into
the delicate quietness Here comes out the high inertia power source born from the idea of
creating a power source highlighting the ever-changing dynamism than any other things
The ordinary method conducting control over the power supply for matching to the music
signal has become a delay control lagging behind the real time music, and become the factor
blocking the leaping felling of music The special electrolytic condenser with the excellent
instantaneous discharge feature was built in the high inertia power source By keeping
the sufficient energy in power source, the delay control was kept to the minimum extent
The high inertia power source supplying energy for meeting the rising and falling of the
instantaneous sound could release the lively life feeling of music as it was
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Internal structure adopting box separating construction
The power source part supporting the powerful power scale and with
sufficient capacity
The music has become a drama with its sound not stopping even in the twinkling of
an eye From the fever at the beginning to the quietness of connecting part, the necessary
power supply volume for the amplification of signal should be usually kept stable, and the
instant requirements should also be met at real time The power source of M-8f could get the
supply capability following the dynamism of the music by integrating large-scale electrolytic
condensers of 22,000μF X 2 with the large-scale power transistor equipped with independent
4-wound wire with a large capacity of 800VA
Large-scale block condenser (22,000μF X 2) Independent 4 wound wire 800VA large-scale power
transistor
The countermeasure for completely eliminating noise and thoroughly
protecting the pure and stainless sound.
It is a high rigidity and box-separating construction by adopting various countermeasures
against noise and un-wanted vibration With the 5-points earthing FRP chassis base which has
an excellent mode of absorbed oscillation as the foundation, the parts are firmly fixed on the
thick chassis, the case body construction at heavyweight level keeping off the vibration noise
was obtained In addition, by taking the layout without direct interference with each other of
the power transistor, chemical condenser, amplifier block, and the separating of these blocks
with shield plates, as well as the strengthening of internal filter, the flux and the interference of
noise are cut down
The special custom-made parts group provided by Luxman is a "must"
(product ) for improving sound quality.
In the music, there hides a life of sound which was not yet heard by the
ears of human Based on this confidence, for completely exploring the music information
hided in the source, Luxman has been dedicating itself to the improvement of the reproduction at tiny level by adopting of
custom-made parts And the data and performance achieved through the development of
high sound quality parts by years efforts has given birth to the Luxman special custom-made
parts For making good resistor, the studies on the varieties of materials and methods from
the selection of alumina used as the porcelain material, to etching, carbonization, terminal
material, terminal shape, press-in method, etc should be carried out on the basis of carbon
film resistor with excellent sound effects For rapidly increasing the transferring volume of
information, the special resistor which could reproduce the music with rich expression was
adopted In addition, the custom-made parts filled with dedication to the high level technology
and sensibility headed by power transistor, followed by electrolytic condenser, copper styrol condenser, copper-made bus bar, high purity cable, etc are adopted In the fields of
custom-made parts group that could be said the exclusive kingdom of Luxman, you could
enjoy all the sensibility shown by Luxman on audio
The large-scale of power meter with more efforts being poured into the
illuminant color was built in.
The logarithmic compression display method that could read the digits easily was
adopted in the power display meter in the size of large-scale 120 X 100mm Acryl thickness is
10mm The efforts are also put into the illuminant color and illumination effect of brand log,
so the high-grade audio space could be put into operation Still, the action of meters and the
illumination are attached with the On/Off functions
The attenuators for changing input level of fixed resistors and the
colorful input/output terminals
The independent left and right attenuators decided by the changing method of 6-point
fixed resistor for matching to the balance/unbalanced situations are installed in input part
So it could carry out the control at input level without exerting any influence on the sound
quality Furthermore, under the consideration of the easy-of-use when integrating with other
types of machines, the reference position which could pick up 100W output when the input
was 1V was set up In addition, except installing the 2 systems of balance terminal and RCA
terminal at the input terminals, the high-grade and large-scale independently-developed
speaker terminal matching to the banana terminal was built in at the speakers terminal
Input attenuator equipped with reference position The large-scale speaker terminal matching to
banana lug
The inexpugnable modeling beauty and high grade finish
It is a forum so intimate to the colorful music space Audio amplifier is pursuing such
dignified beauty The symmetrical design was adopted in C-8f for removing the surplus
performances It is a slim and clean front panel The precise hair line processing that reflecting
the grade of the articles of everyday use could give you a legend of the high processing level
in the internal mechanical part
