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Extracted text from Luxman CU 80 Brochure (Ocr-read)
Page 1
T h e M U - 8 0 , w h i c h c a n c o m p l e t e l y h a n d l i n g t h e 8 i n c h
balance/unbalance inputs, is an 8 inch analog power amplifier
directly inheriting the tradition of Luxman. Like CU-80, the
MU-80 has built itself into a power amplifier through installing
the DNF version2.2 circuit of the latest generation and aiming at
becoming an amplifier combining strength and transparency. The
powerful amplifier circuit, which could give the biggest output
(when the 8 channels operate simultaneously) of 100W X 8inch (8
-„¦) by equipped with the powerful power resource, could connect
BTL=bridge among the neighbouring channels. For example, when
the 4 channels were operated, the maximum output could be set
up to 300W (when operating simultaneously, 8-„¦) each, and the
operation of BTL 3inch + normal 2inch could also be set simply.
One of the features of MU-80 is its universal design flexibly coping
with all kinds of speaker environments.Here we would like to introduce the high-grade pure audio
multi-channel that could bring you high-end stereo phonic
reproduction in the same dimension. The CU-80, which was
built by Luxman by pouring its enthusiasm and heart in sound,
is the high-grade control amplifier handling the multi-channel
input (2 independent systems) in the biggest size of 8 inch. For
operating all the channels under the equivalent conditions while
maintaining the high sound quality, the CU-80 has installed the
optimized
-»LECUA-WM§ through controlling via computer
the high purity electronic control attenuator of -»LECUA§
self-developed by Luxman which was built in stereo control
amplifier on C-70. It is the confident product for handling the
output of all channel balance and which was equipped with
analog down mix circuit using for dealing with some supposed
varieties of channel environments.
Beautiful Sound Contributed by High-Grade Multi-Channel
Demonstration of indefatigable driving force CU-80
MULTI-CHANNEL CONTROL AMPLIFIER
T e c h n o l o g y
C U - 8 0
MU-80
8-CHANNEL POWER AMPLIFIER
F o r o p e r a t i n g t h e o r i g i n a l L E C U A ( h i g h p u r i t y
electronic control attenuator) installed in C-70f for
balanced operation at 8 inch, the weighted matrix type
LECUA-WM was newly developed for CU-80 In the
position detecting circuit using the exquisite rotary
e n c o d e r a n d m i c r o c o m p u t e r c o n t r o l , a l l t h e 8 i n c h
audio signals are put under the high-precision control
The volume balance of each channel could be finely
tuned at 1dB unit (-20 -“ 0dB) In center channel, rear
speaker, etc , when the efficiency and volume feeling
of using speaker system are different, the randomly
setting up of levels between the channels aiming at
coping with the disk record level is the function that
the multi-channel-oriented machine hopes for And
the LECUA-WM has adopted the design which set
the simple signal bass *
s sound quality at the top
priority under the condition of combining the high
sound quality fixed resistors CU-80 was completely
free from the gang error which was unavoidable for the
conventional type variable resistance ranged from the
maximum volume to the minimum volume, and could
deliver an error-free and co-existing environment for the
reproductions of both stereo and multi-channel
High-purity attenuator LECUA-WM was
built for volume-tuning
C U - 8 0
The level adjustment among the channels
which are free from the deterioration of
sound quality is available
The newly-developed LECUA-WM installed in CU-80
has made the composition of line level amplifiers an
easy thing by setting the attenuation value of each
channel one by one Till now, for ensuring the setting
up of the level of each channel, in the most cases, the
method is to set the sub-attenuators at the anterior
segment or the posterior segment of master attenuator
which could link all the channels in operation In this
way, the deterioration of sound quality arising from the
increasing of wiring, as well as from the connecting with the series of variable resistors will have nothing
to do with CU-80 Because each channel level could
be simply operated via the attached remote controller,
you can adjust the channel balance from any listening
position you are sitting at With successful development
of LECUA WM, CU-80 was turned into control
amplifier which has installed the simple line amplifier
at maximum size of 8inch The secret for significantly
raising of multi-channel
's grade lies in LECUA-WM
Input
Output
10dB step1dB step
Weighted Matrix
buff
Schematic Diagram of LECUA-WM Circuit
Page 2
CU-80 F u n c t i o n
S e v e r a l s u r r o u n d s o u r c e s c o u l d b e
connected simultaneously
The inputs of multi-channel are installed in two
systems Since the coaxial line level signals
from universal player, super audio CD, DVD,
surround decoder, AV amplifier *s free output,
etc could be simultaneously connected to the
2 systems, so the operations could be switched
among several multi-channel machines XLR balance connectors are installed in
overall output channels
For coping with all kinds of power amplifiers,
e x c e p t t h e u n b a l a n c e o u t p u t , t h e b a l a n c e
outputs (with HOT pin switching function)
are installed as standard in all channels So the
ideal balance transferring connection which
could remove the outside noises is available To t a l l y 4 s y s t e m s s p e c i a l i n p u t a re
prepared for 2 inch stereo machine
F o r c o n n e c t i n g t h e r e a l 2 - c h a n n e l s p e c i a l
machine, the input connectors, 2 groups for
each, totaling 4 groups, for balance/unbalance
are equipped with It could sufficiently handle
the input even for the stereo reproduction Still,
one group of connectors was also prepared for
the input/output of recorder
The output connectors coping with the twin
drivers of center and sub-woofers are prepared
For forming varieties of patterns for connecting
multi-channel, two groups of output connectors
are specially prepared for the center channel
and sub-woofer channel Thus the availability
of speaker layout was increased, as well as a
high-grade twin drive environment could be
created
T h e a n a l o g d o w n m i x f u n c t i o n w i t h
attention attached to sound quality
The 4 1 inch (6 1inch) reproduction without
using the center channel, the 5 0 inch (7 0 inch)
reproduction without sub-woofer, or the 4 0
inch (6 0 inch) production without using both
the center channel and the sub-woofer are the
most available multi-channel structure for the
audio file which puts the 2 channel reproduction
at the preferred position For perfectly meeting
that demand, the CU-80 was equipped with the
down mix functions which could independently
set up the center and sub-woofer in the analog
fi e l d I t c o u l d a l s o r e a l i z e t h e fi n e t u n e o f
mixing level by easy-of- use remote controller
EX-1 and EX-2 of input/output: option
By equipped with 2ch multi-amplifier mode which could supply outputs at most for 4 systems
for the special operations for the 2-channel reproduction; and with the 4ch bi-amplifier mode
which could provide outputs for the 2 independent systems set in the front and the rear for the 4ch
matching system employing the down mix function, and by using the speakers matching with the
bi-wiring, the CU-80 could be flexibly and luxuriously used in driving of the bi-amplifiers 4 inch bi-amplifier mode and 2 inch multi-amplifier mode for forming application system
The FL display with dimmer function for
improving the brightness of listening room
By the introduction of the large-scale dot matrix
FL tube with four graduations for adjustment, the
actions far away could also be recognized clearly
The high-grade aluminum-made remote
c o n t r o l l e r w h i c h c o u l d o p e r a t e o n a l l
functions at hand
With the specially designed aluminum-made remote
controller with illumination function, you could
simply control all kinds of operations of CU-80 at
the listening position
Display via. dot-matrix FL tube (The switching between
ON/OFF could be done via. remote control operation) power indicator
Power switch
Input selector Volume controller
line straight switch
Monitor switch
Output mode switch Center channel down mix Sub-woofer down mix
Line phase sensor
Multi-channel input Stereo line input (2 systems)
Monitor input connector
Record output connector Multi-channel output (coaxial)
AC inlet
AC output (Synchronism)
AC output (Non-synchronism)
Single ground (earth)
connector Multi-channel input 2
Line input
(Balance 2 system)Balance input phase-
changing switch
Multi-channel output (balance)
CU-80 Down mix schematic drawing
The down mix center (c) and
sub-woofer (SW)s level could
be adjusted within the range of
-12dB -“ 0dB.
Input output
mix mix FR
FR
FL
FR
C
SW
The Output modes other than CU-80 MULTI
4CH mode 2CH mode
FL
FR
C
SW
SL
SR
(EX-1)
(EX-2) FL
FR
C
SW
SL
SR
(EX-1)
(EX-2)FL
FR
C
SW
SL
SR
(EX-1)
(EX-2) FL
FR
C
SW
SL
SR
(EX-1)
(EX-2)
Output
Input Output
Input