Luxman CL-1000 Owner's Manual
VACUUM TUBE CONTROL AMPLIFIER
CL-1000
Owner`s Manual
Contents
Precautions ············································································································· 1
Features of This Unit ································································································ 2
Names and Functions ······························································································ 4
Connections ············································································································ 9
Operations ············································································································· 12
Block Diagram ······································································································· 13
Specifications ········································································································ 14
Before Asking for Repair Service ············································································ 16
VACUUM TUBE CONTROL AMPLIFIER CL-1000
Precautions
Installation place
Install this unit in a location where good ventilation and heat
radiation are assured.
Especially, installation of this unit where direct sunlight is
present, where the temperature rises excessively high such
as close to a heater, or where it is humid or dusty may cause
a malfunction even if heat is efficiently released.
Therefore, do not install this unit in such places.
Ventilation holes
The ventilation holes of this product must not be blocked be-
cause this unit is a vacuum tube amplifier and generates con-
siderable heat. If the amplifier is installed on a rack or the like,
secure ample space for cooling and leave the door open. Do
not pile up other things on the amplifier and never put articles
on it. Failure to observe this may cause a malfunction.
Note:
For heat dispersal, do not install this equipment in a confined
space such as a book shelf or similar unit.
* Note
The sound is not generated shortly after
the power supply is turned on.
This amplifier is equipped with a time muting circuit in order
to separate the output circuit. Therefore, no sound will be
generated shortly after the power supply is turned on.
If the volume control is set to a high sound level before the
time muting circuit is canceled, a large sound is suddenly
generated. Please be advised that the volume control shall be
set to a low level at first and adjusted after the sound comes
out of the speakers.
Repair and adjustment
When repairs and adjustments are needed, please consult
with the dealer where you bought the unit.
Cleaning
For cleaning, use a piece of soft cloth to wipe the unit such as
cleaning cloth. When the dirt is hard to remove, use a small
amount of neutral detergent to wipe, and then wipe the unit
with dry cloth. Do not use a solvent like benzine or thinner
because such a substance can damage the exterior.
* *
*
Wall
Precautions in connecting with other
components
When connecting this unit to input devices such as a CD
player, an SACD player, a tuner, and an analog record player,
be sure to turn off the power of this unit and all other con-
nected devices. Failure to observe this may generate a strong
noise resulting in speaker damage or cause a malfunction.
The pin-plug to be inserted in each input terminal of this unit
shall be pushed in firmly. If the grounding terminal is inade-
quately connected, noises including hum may be generated,
resulting in an adverse S/N ratio.
Safety caution
Caution
This unit is heavy. Be careful when unpacking, carrying, and
installation.
This unit is a vacuum tube control amplifier. In the state of the
unit in operation, the main body gets hot. Be careful not to
touch it with your bare skin. For safety, do not use this product
in a place where children or unchained animals are present.
1
Features of This Unit
LECUTA
LUXMAN Electronically Controlled
Ultimate Transformer Attenuator
The 34-contact transformer type attenuator in which
FINEMET® core is used is switched with paired 34 pieces
of relays. The transformer type attenuator can suppress the
DC resistance generated in series with the signal transmis-
sion line.
FINEMET® manufactured by Hitachi Metals, Ltd. is used
for the core material of the transformer type attenuator like
MQ-300, and therefore, this attenuator features excellence
in the audible frequency characteristic and little change in
sound quality because of low permeability and low core loss
in a wide band.
Minimization and the same length of the connection wires
between the attenuator and relays at all the 34 contacts can
make changes in sound quality due to sound levels minimize.
Vacuum tube amplification circuit
The attenuator driver circuit, tone control circuit, and flat am-
plifier circuit contain a vacuum tube manufactured by JJ Elec-
tronic (Slovakia) (E88CC x 6).
Vacuum tube, E88CC-JJ
E88CC is an SQ (abbreviation of Special Quality) tube whose
characteristics are the same as those of the reliable tube and
features low noise.
Phono equalizer circuit equipped in EXT-IN
The phono equalizer circuit that contains FET and an op-
erational amplifier is used. MM, MC, or impedance can be
selected in accordance with the cartridge to be used. The
capacitor that we recommend can be also selected.
Balanced input circuit
A dedicated super permalloy transformer is equipped in the
input circuit.
PHASE INVERT function
The phase can be switched in accordance with the polarity
of the balanced input or output device to be connected to
this unit.
The phase of the unbalanced output of this unit can also be
switched.
ARTICULATOR function
Clear sound can be reproduced thanks to demagnetization
and tuning of the attenuator transformer.
After the power is turned on, the attenuator transformer is au-
tomatically demagnetized during the mute function activated.
This operation can be conducted even manually with the use
of the ARTICULATOR switch.
A signal is generated by the internal oscillator, this signal is
gradually decreased, and then the attenuator transformer is
demagnetized. If the internal oscillator is not in use, the power
of it is turned off. Therefore, the oscillator does not interfere
with the audio circuit at the normal use.
Eliminating resistance of audio signal line
Elimination of the resistance generated in series with the au-
dio signal line from input to output allows sound quality deg-
radation to be reduced and superior sound reproduction to
be realized. (Resistance is present when phono equalizer is
activated and the LINE STRAIGHT switch is set to off)
Tone control
LUX type tone control circuit is used, which is a classic style.
This unit is also equipped with the bass/treble tone control
function that can select the turnover frequency from three po-
sitions to allow the tone quality to be finely adjusted.
Wooden top cover
A U-shaped wooden top cover is used, which matches with
classic design.
Gloss coating finish with rosewood color is applied on walnut
veneer.
Balance output circuit
A dedicated super permalloy transformer is equipped in the
output circuit.
2
VACUUM TUBE CONTROL AMPLIFIER CL-1000
Highly stable power supply
Highly stable power supply circuit that combines a large-
capacity EI-core-type power transformer with customizable
block capacitors.
Schottky barrier diodes
By using Schottky barrier diodes, manufactured by KYOCERA
(former Nihon Inter Electronics Corporation), this unit achieves
higher DC conversion efficiency in the rectifier circuit and
much less switching noise.
Original LUXMAN’s OFC wiring
Our original un-plated OFC wiring with spirally wrapped shield-
ing is used for all internal connections to ensure smooth, pure
signal transmission.
Loopless chassis structure
This unit features a loop-less chassis, independently con-
structed to eliminate increases in ground impedance caused
by chassis current.
Input/output terminals
RCA terminal made of copper alloy and XLR terminal manu-
factured by Neutrik.
Selector relay
Selector relay with high sound quality used in the key point
of LUXMAN amplifier, which enhances the separation and
crosstalk performances.
Floating structure
Every block of the vacuum tube has a floating structure to
reduce microphonic noise.
Cast-iron insulator
This unit is equipped with gradation cast-iron insulators that
cuts out unnecessary external vibration and strongly supports
the weight of this unit.
Low cut, monaural
This unit has a low cut switch to suppress woofer fluctuation
caused by a warped analog record and a monaural switch
that is useful at monaural record playback.
Two lines of unbalanced output
This unit has two lines of output terminals that are useful for
wiring in the bi-amplifier structure in which two power amplifi-
ers are used. (two lines always output)
Two lines of balanced output
This unit has two lines of output terminals that are useful for
wiring in the bi-amplifier structure in which two power amplifi-
ers are used. (two lines always output)
Custom-made parts
LUXMAN’s original high sound quality oil capacitors are used.
Highly reliable design
Prolonged life and highly reliable design have been achieved
by providing operating conditions of vacuum tubes with some
allowance.
• FINEMET® is a registered trademark of Hitachi Metals, Ltd.
• The described company names and product names are trade-
marks or registered trademarks of each company.
3
Names and Functions
16 15 14 13 12 11 10 9 7817
654321
Front panel
1. Operation switch (OPERATION)
Toggles the power on and off.
When wiring or connection is performed, be sure to turn off
this switch. When turning on the power switch again after
turning the unit off, wait for more than one minute.
2. Input selector (INPUT)
Selects an input device from the devices such as a CD
player, an SACD player, a tuner, and an analog player
connected to each input terminal.
This selector has five positions consisting of LINE-1,
LINE-2, LINE-3, BAL LINE and EXT-IN that correspond to
each input terminal on the rear panel. To select an input
source, set the selector to the position of the input source
to be played back.
The EXT-IN is used for PHONO input.
3. Low frequency selector switch
(FREQUENCY/Hz)
Toggles to select frequencies from 150 Hz, 300 Hz, 600Hz.
For example, when 150 is selected, the frequencies of
150Hz and lower can be adjusted by the tone control for
bass.
4. High frequency selector switch
(FREQUENCY/Hz)
Toggles to select frequencies from 1.5 kHz, 3 kHz, 6 kHz.
For example, when 1.5 k is selected, the frequencies of
1.5kHz and higher can be adjusted by the tone control for
treble.
5. Pilot light
This switch turns on and off the power. When connecting
the input/output terminals, be sure to turn off this switch.
This light blinks during mute.
6. Volume control (VOLUME)
Adjusts the sound volume.
There are 34-step changes between ∞ and 0 (–dB).
Sound is not generated when this control is rotated
counterclockwise to the end. The sound volume gradually
becomes higher as the control is rotated clockwise.
4
Loading...