INTEGRATEDAMPLIFIER
L-505uX
Contents |
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Precautions.......................................................................................................................... |
1 |
Features of This Unit............................................................................................................ |
2 |
Names and Functions.......................................................................................................... |
4 |
Connections....................................................................................................................... |
10 |
Operations.......................................................................................................................... |
14 |
How to Use Remote Control.............................................................................................. |
16 |
Block Diagram.................................................................................................................... |
18 |
Specifications..................................................................................................................... |
19 |
Before Asking for Repair Services..................................................................................... |
20 |
Precautions
NTEGRATED AMPL FIER L-505uX
Installation place
This unit shall be installed in a well-ventilated and effectively heat-released place.
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
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. This can cause malfunctioning.
Note:
For heat dispersal,do not install this equipment in a confined space such as a book case or similar unit.
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Cautions in connecting speakers
When making speaker system connections, exercise extra care not to short-circuit between and of the speaker terminals and speaker input terminals of this unit. If a large signal is applied to the amplifier with its circuit left short-circuited, a large current may be passed through the output circuit and cause a malfunction.
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 is generated shortly after the power supply is turned on.
If the volume control is moved 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 sound comes out of the speakers.
Protection circuit
This product is equipped with a protection circuit that is activated upon detection of overcurrent, abnormally high temperature, and DC drift to protect the amplifier and speakers. When the protection circuit is activated, the output to the speaker terminal is shut off and the standby indicator blinks to show that this unit is in the muting state. If the protection circuit is frequently activated even when disconnecting the power plug from the wall outlet and turning on the power again after a lapse of a certain time, please consult your dealer.
Precautions in connecting with other components
When connecting this unit to input devices such as a CD player, an SACD player, a tuner, and a recorder, be sure to turn off the power of this unit and all other connected 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 inad-equately connected, noises including hum may be generated, resulting in an adverse S/N ratio.
Batteries
Caution:
Batteries used for remote controller shall not be exposed to excessive heat such as sunshine, fire or the like.
Repair and adjustment
When repairs or adjustments are needed, please ask the dealer where you bought the unit.
Cleaning
For cleaning, use a piece of soft cloth to wipe the unit such as cleaning cloth available on the market. If the unit has become very dirty, remove the dirt with soft cloth absorbing a small amount of neutral detergent, and then wipe the unit with dry cloth. Do not use a solvent like benzine or thinner because such a substance can often damage the exterior.
Features of This Unit
LECUA-WM - LUXMAN Electric Controlled Ultimate Attenuator - Waiting Matrix
Mounted with Electrically controlled attenuator for gaining attenuation amount in combination with the resistance.
By using the dedicated solid state IC to control the attenuator to the sound volume corresponding to the angle of the volume nob, the operation texture similar
with conventional slide-type volume is realized.
ODNF - Only Distortion Negative Feedback -
The amplification feedback circuit that has acquired the high-speed primary slew rate and ultrahigh bandwidth by feeding back only distortion components generated during amplification to maintain the pure sound quality of the main-amplifier that is almost non-feedback.
The version, 2.3, has achieved the low impedance and high S/N ratio of the transmission circuit by parallelization of the first and second stages of the amplifier circuit.
In addition, the input stages of the error detection circuit are parallelized to moderate the frequency
characteristic and noise.
Parallel push-pull output stages
Bipolar transistor parallel push-pull structure.
100W+100W (8Ω) rated power output.
High-inertia power supply
High-inertia electronic circuit that combines a largecapacity EI-core-type power transformer with customizable 10,000μF × 4 capacitor blocks.
Parallel speaker relays
This unit is equipped with large type of 2 parallel speaker relays with a low resistance value to reduce the impedance of the speaker output lines.
Beeline construction
Newly designed beeline construction composes the audio input signal via the optimally shortest route to the speaker output.
Selector switch IC
Selector switch IC with high sound quality, which is used in the top-end control amplifier, C-1000f, improves the separation and crosstalk performances.
Schottky barrier diode
Application of schottky barrier diode manufactured by Nihon Inter Electronics Corporation that has less switching noises and higher conversion efficiency to the DC voltage for the power supply rectifier circuit.
LUXMAN’s original OFC wires
Our original OFC wires are used in the internal wiring to achieve smooth signal transmission thanks to the spiral wrap shielding on each core and the nonplating process on the core wire.
NTEGRATED AMPL FIER L-505uX
Round pattern board
After careful consideration of delicate audio signal flow, a round pattern board has been applied to
achieve smooth signal transmission.
Phono amplifier
This unit is equipped with a phono amplifier that is compatible with the MM/MC cartridge to achieve analog record reproduction in a high-grade level
without adding a dedicated phono amplifier.
Separate function
This unit is equipped with a separate switch to separate the pre-amplifier and power-amplifier each other that enables the bi-amp connection adding a power-
amplifier and the coexistence with anAV system.
Loopless chassis structure
This unit consists of the independent construction of a loopless chassis to eliminate increased ground
impedance caused by chassis current.
18 mm pitch RCA terminal
Introduction of 18 mm pitch all RCA input/output terminals allows even a high-performance line cable
with large plug to be connected.
Large type of speaker terminals
Speaker terminals (A and B systems) of inline layout (with same characteristics for right and left), which is compatible with Y lugs to enable easy connection
with extra-thick speaker cables.
New standard size
This unit has been manufactured based on LUXMAN's new standard size (440mm wide, common with a series of separate amplifiers and a series of SACD
players.
Headphone output terminal
This terminal allows you to casually enjoy sound even at midnight.
AC inlet
This inlet enables the connection with an external power cable.
Needle-type meter
This unit is equipped with needle-type meters lighted with LED, which improves the visibility in the room
where the unit will be installed.
Remote control encased in aluminum
The high-grade remote control, which is encased in aluminum, can control applicable CD/SACD players.
Names and Functions
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.
2. Operation indicator (OPERATION)
Blinks in the time of muting mode when the operation switch is turned on and lights up when the operation state is activated afterward. This indicator blinks when the unit is in the muting mode or when the volume is adjusted with the remote control.
3. Input selector (INPUT SELECTOR)
Selects an input device from the devices such as a CD player, an SACD player and a tuner connected to each input terminal.
The input selector has 6 positions consisting of LINE-4, LINE-3, LINE-2, LINE-1, BAL LINE, and PHONO from left to right that correspond to each input terminal on the rear panel. The knob is rotated to light the input indicator of the input device to be selected.
4. Input indicator
Lights up at the input device to be selected with the input selector or remote control.
5. Display
Displays the operation status of this unit.
This display is composed of 5 indicators and 2 power meters.
6. Remotecontrolinfraredreceiver(REMOTE)
This is a sensor to receive signals from the accessory remote control.
7. Volume control (VOLUME CONTROL)
Adjusts the sound volume. Sound is not generated when this control is rotated counterclockwise to the end, and then, the sound volume gradually becomes higher when the control is slowly rotated clockwise.
NTEGRATED AMPL FIER L-505uX
8. Headphone jack (PHONES)
Insert the headphone plug into this output jack. Even when the plug is inserted, signals to the speaker output terminal are not interrupted. Accordingly, to listen to sound with only use of headphones, set the speaker selector to off.
9. Separate switch (SEPARATE)
Separates the pre-amplifier and main-amplifier each other.
off: |
Uses this unit as a normal pre-main |
(separate |
amplifier. |
indicator off) |
|
on: |
Feeds external signals from the MAIN |
(separate |
IN terminal on the rear panel to the |
indicator on) |
main-amplifier section. |
Every pressing of this switch toggles the separate on and off.
The separate indicator lights up when the separate switch is on.
When the separate switch is set to on, the volume control of this unit cannot adjust the volume of the speakers connected to this unit. Volume adjustment shall be performed at the input device side such as the control amplifier connected to the MAIN IN terminal.
Entry of direct output into the MAIN IN terminal from a CD player or other devices that cannot adjust sound volume constantly provides a full power state and accordingly results in the risk of speaker damage.
For such input devices, be sure to use a control amplifier equipped with the sound volume adjustment function as a relay, generate sound through the speakers with volume lowered, and adjust the volume to your favorite level.
When arranging the wiring, be sure to turn off the power of this unit.
10.Line straight switch (LINE STRAIGHT)
Enhances the purity of the sound quality by passing the balance control circuit, tone control circuit, or the like.
off: |
Line straight off/bypass off |
(separate |
|
indicator off) |
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on: |
Line straight on/bypass on |
(separate |
|
indicator on) |
|
Every pressing of this switch toggles the line straight on and off.
The line straight indicator lights up when the line straight switch is on.
When the line straight switch is set to on, the balance control, tone control and loudness cannot be adjusted and the mode selector does not function.
11.Balance control (BALANCE)
Adjusts the balance of sound volume between right and left channels.
Rotating this switch counterclockwise causes the left sound volume to be enhanced, and rotating the switch clockwise causes the right sound volume to be enhanced.
This switch shall be set to the center position under normal conditions, and rotated to make adjustment if necessary.
When the line straight switch is set to on, this switch does not function.
12.Tone control for treble (TREBLE)
Controls the frequency characteristics in the highfrequency range.
When this switch is set to the center position, flat frequency characteristic is obtained. Rotating the switch clockwise causes the high-frequency range to be enhanced, and rotating the switch counterclockwise causes the high-frequency range to be attenuated.
When the line straight switch is set to on, this switch does not function.
Names and Functions
13.Tone control for bass (BASS)
Controls the frequency characteristics in the lowfrequency range.
When this switch is set to the center position, flat frequency characteristic is obtained. Rotating the switch clockwise causes the low-frequency range to be enhanced, and rotating the switch counterclockwise causes the low-frequency range to be attenuated.
When the line straight switch is set to on, this switch does not function.
14.Speaker selector (SPEAKERS)
Selects either of 2 speaker systems, A or B, located at the rear panel.
OFF: Activates only headphones. No sound is generated from any speakers.
A:Selects the A system speaker terminal.
(center)
B:Selects the B system speaker terminal.
A+B: Simultaneously activates both A and B system speakers. When both speaker terminals are simultaneously used, select speakers with impedance of 8 ohms or more because both output terminals are connected in parallel.
15.Recording switch (REC OUT)
Sends recording signals to the recorder connected to this unit.
OFF: |
Does not send recording signals to the |
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recorder output terminals on the rear panel. |
|
When not using the recorder, set the |
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recording switch to this position. |
ON: |
Selects an input source to be recorded |
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with the input selector and sends recording |
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signals to the recorder connected the |
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recorder output terminals of this unit. |
16.Cartridge selector (CARTRIDGE)
Changes the gain level of the equalizer amplifier
(amplifier circuit required to play an analog record).
MC: Selects an MC (moving coil) type cartridge of low output voltage.
Be aware that the sound volume becomes higher and unbalanced sound without high frequencies is generated owing to the impedance when “MC” is selected during use of the MM type cartridge.
MM:Selects an MM (moving magnet) type cartridge of high output voltage.
17.Monitor switch (MONITOR)
Toggles between use and nonuse of the monitor input terminals (MONITOR) on the rear panel.
off: |
Enables to reproduce the data from the |
(monitor |
recorder. |
indicator off) |
|
on: |
Enables to reproduce the data from the |
(monitor |
source selected with the input selector. |
indicator on) |
|
Every pressing of this switch toggles the monitor on and off.
The monitor indicator lights up when the monitor switch is on.
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