Luxman L-509Z User manual

INTEGRATED AMPLIFIER
L-509Z

Contents
Precautions ············································································································· 1
Features of This Unit································································································ 2
Names and Functions······························································································ 4
Connections ·········································································································· 12
Operations············································································································· 16
How to use Remote Control ·················································································· 18
Block Diagram······································································································· 20
Specifications ········································································································ 21
Before Asking for Repair Services·········································································· 22

1
INTEGRATED AMPLIFIER L-509Z
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 exces-
sively high such as close to a heater, or where it is humid or
dusty may cause malfunctions even if the heat is efficiently
released. Therefore, do not install this unit in such places.
Ventilation holes
The ventilation holes on the top and bottom panels of this
product should never be blocked. If the amplifier is installed in
closed rack or similar location, ensure ample space for cooling
and leave the door open. Never place anything on top of the
amplifier. Failure to observe these may cause malfunctions.
Note:
For heat dispersal, do not install this equipment in a confined
space such as a book case or similar unit.
* Note
Wall
*
*
*
Precautions when connecting to other
components
When connecting this unit to other input devices, such as a CD
player, SACD player, D/A converter or tuner, be sure to turn off
the power to this unit and all other connected devices first.
Failure to observe this may generate a dangerous noise shock
resulting in speaker damage and may cause malfunctions.
The connectors to each input terminal of this unit must be
pushed in firmly. If the grounding terminal is inadequately
connected, noise or hum, may be generated, resulting in an
adverse S/N ratio.
Batteries
Warning: Batteries used for the remote control shall not be
exposed to excessive heat such as sunshine, fire or the like.
Cautions when connecting speakers
When connecting to a speaker system, exercise extra care
not to short-circuit between the positive and negative con-
nections of the speaker terminals and the speaker input
terminals of this unit. If a large signal is applied to the ampli-
fier while it is short-circuited, a large current may be passed
through the output circuit and cause malfunctions.
Sound is not generated shortly after the
power supply is turned on.
This amplifier is equipped with a timed muting circuit to pro-
tect the output. Therefore, no sound will be generated for a
short time after the power supply is turned on.
If the volume control is set to a high-volume level before the
timed muting circuit disengages, a loud, dangerous volume
will be suddenly generated. Set the volume control to a low
level first and then adjust it after you hear the output from
the speakers.
Protection circuit
This product is equipped with a protection circuit that is
activated upon detecting overcurrent, abnormally high
temperatures and DC drifts to protect the amplifier and
speakers. When the protection circuit is activated, the out-
put to the speaker terminals will be shut off and the standby
indicator will blink to show that this unit is muted. If the
protection circuit is frequently activated, disconnect the AC
plug from the wall outlet, wait for a while and then reconnect
the plug to the wall outlet again and turn on the power. If the
problem persists, please consult your dealer.
Repair and adjustment
When repairs or adjustments are needed, please consult
the dealer who sold you the unit.
Cleaning
For cleaning, use a piece of soft fabric such as a cleaning
cloth to wipe the unit. If dirt is hard to remove, use a small
amount of neutral detergent to wipe it off and then wipe
the unit with dry cloth. Do not use a solvent like benzine or
thinner because they could damage the exterior.
Safety caution
Warning
This unit is heavy. Be careful when unpacking, carrying, and
installing it.
Take care if you try to perform all the installation work yourself
to avoid injury.

2
Features of This Unit
LECUA-EX — Luxman Electronically
Controlled Ultimate Attenuator-Excellent
eXperience —
Our unique sound volume adjustment mechanism LECUA,
that is the integration of a high precision attenuator and
an amplifier circuitry, is now integrated with a heavy rota-
tion mechanism which offers excellent control feeling and
employed here as LECUA-EX.
Electrically controlled fixed resistance switching enables fine
sound volume adjustments from 0 dB through –87 dB with no
deterioration in sound quality over the full range of the volume
control.
LIFES — Luxman Integrated Feedback
Engine System —
ODNF, LUXMAN’s original amplification feedback circuitry,
has been renewed, and LIFES, our newly developed feed-
back engine, is incorporated right at the heart of this amplifier,
developing a richer sound quality.
Adopting a dual FET into the input section of the sub amplifier,
which detects any distortion in the audio signal, and dual tran-
sistors in the cascade circuit and current mirror circuit, sound
quality has been improved throughout the amplification circuit
with a transparent sound quality comparable a non-feedback
equipped amplifier and excellent high frequency character-
istics.
This unit has LIFES of full-discrete configuration on both the
pre-amplifier section and the power-amplifier section respec-
tively.
Quadruple-paralleled push-pull output
stages
Quadruple-paralleled bipolar transistors in push-pull configu-
ration are used.
Rated output of 120 W+120 W (8 Ω), 220 W+220 W (4 Ω)
Highly stable power supply
The unit’s highly stable power supply circuitry features a
large capacity EI-core-type power transformer with 8 custom
designed 10,000 μF blocking capacitors.
Peel coat, PCB
Peel coat PCB, where gold plating is applied on 100 μm thick
copper foil instead of applying resist, is used for the amplifier
circuit board so that dielectric effect on resist is eliminated.
Parallel speaker relays
This unit is equipped with 2 large parallel speaker relays with a
low resistance value to reduce the impedance of the speaker
output lines.
Beeline construction
LUXMAN’s Beeline construction ensures that the audio signal
path takes the optimum shortest route from input to speaker
output.
Selector switch IC
The selector switch IC, as used in our high-end C-900u con-
trol amplifier, supports high quality audio and improves input
separation and crosstalk performance.
Schottky barrier diodes
By using Schottky diodes, manufactured by KYOCERA
Corporation, this unit achieves very high DC conversion
efficiency in the power rectifier circuitry and much less
switching noise.
LUXMAN’s original OFC wiring
Our original OFC cable, with non-plated core wire, is used for
internal wiring to achieve smooth signal transmission.
Non-angled circuitry
After carefully considering the delicate nature of the audio sig-
nal flow, non-angled circuit board tracking has been adopted
to achieve smooth signal transmission.

3
INTEGRATED AMPLIFIER L-509Z
Phono amplifier
This unit is equipped with an integral phono amplifier
compatible with the MM/MC cartridge to achieve high-quality
analog record reproduction without the need for an external
dedicated phono amplifier.
Separate function
This unit is equipped with a “SEPARATE” button used for
separating the pre-amplifier and main-amplifier sections from
each other. This enables bi-amp connections to an external
power-amplifier and facilitates integration with an AV or home
theatre system.
Loopless chassis structure
This unit features a loop-less chassis, independently con-
structed to eliminate increases in ground impedance due to
chassis current.
Original high rigidity RCA terminals
20 mm pitch original high rigidity RCA terminals are used for
LINE-1 and LINE-2 inputs.
18 mm pitch RCA terminals
We have used 18 mm pitch RCA input terminals for inputs
other than LINE-1 or LINE-2 to support high quality audio
cables with large connectors.
Ventilation
A large ventilation holes on the top panel enhance the heat
dissipation effect of the unit. Design similar to M-10X is
employed.
Cast-iron insulators
For stability and support, this product features cast iron feet
with vibration reducing density gradient.
Hairline top panel
The top panel, with an elaborate hairline finish, is attached to
the blasted white main body panels.
Large speaker terminals
The speaker terminals (A and B systems) have a separated
inline layout (with the same characteristics for right and left)
and are compatible with Y lugs to enable easy connection
using extra-thick speaker cables.
Headphone output terminals
Enables you to enjoy listening on headphones. A 4.4 mm
terminal with ground separation is provided in addition to a
standard 6.3 mm terminal.
Needle type meter
This needle type meter with LED lighting appears beautiful in
the listening room.
Visibility is excellent thanks to white illumination.
* 7-segment display is featured at the center as a sound
volume indicator (capable of turning off).
Aluminum remote controller
The high-grade, aluminum finished, hand-held remote can
control compatible CD/SACD players as well as this unit.

4
Names and Functions
1. Operation button (OPERATION)
Turns the power on and off (standby state). When connect-
ing input/output terminals, be sure to turn off this button.
2. Operation indicator (OPERATION)
Blinks during mute mode when the operation button is
turned on and lights up when the operation state is reached
after a short time. This indicator blinks when the unit is in
the muting mode or the sound volume is adjusted with the
remote control.
3. Input selector (INPUT SELECTOR)
Selects an input device, such as a CD player, an SACD
player, a D/A converter, or a tuner connected to each input
terminal.
The seven input selectors indicate LINE-4, LINE-3, LINE-2,
LINE-1, BAL LINE-1, BAL LINE-2 and PHONO which cor-
respond to the input terminals on the rear panel. Adjust the
selector to the desired input.
4. Input indicators
The selected input’s indicator will light up when using the
input selector or remote control.
5. Display window
Displays the operation status of this unit.
This display is composed of 6 indicators, sound volume
indicator, and 2 power meters.
6. Remote control infrared receiver (R)
Receives signals from the accessory remote control.
7. Sound volume indicator
Indicates the amount of volume attenuation in –dB.
8. Volume control (VOLUME CONTROL)
Adjusts the sound volume.
Since a rotary encoder is employed and the knob is a full-
rotation type, adjust the sound volume while monitoring the
sound volume indicator of 7 above.
Sound will be muted (– – display) when this control is
rotated fully counterclockwise and reached the end. Volume
will gradually increase as the control is rotated clockwise as
follows: mute →–87 dB →–86 dB →... →0 dB in steps
of 1 dB.
Front panel
910111213141516
17
1819
5 86 71 2 43

5
INTEGRATED AMPLIFIER L-509Z
9. Phone jack (PHONES-2)
Insert your standard 6.3 mm headphone plug into this out-
put socket when listening with stereo headphones. Even
when a headphone jack is inserted, signals to the speaker
output terminal are not interrupted. To listen to music using
only your headphones, set the speaker selector to OFF.
10. Phone jack (PHONES-1)
This jack is an output jack to be used with a 4.4 mm stereo
headphone plug.
Even when a plug is inserted in the same way as PHONES-2,
signals to the speaker output terminal are not interrupted.
The PHONES-1 (di. 4.4 mm) phone jack of this unit is a
ground separation type connection model with an unbal-
anced amplifier.
Connection of compatible headphones allows you to enjoy
listening with high separation performance thanks to inde-
pendent wiring of right and left (–) signals.
11. Mute button (MUTE)
When this button is pressed and the mute function is
activated, and the operation indicator will start blinking and
there will be no audio output.
Pressing this button again sets the mute function to off.
12. Line straight button (LINE STRAIGHT)
Enhances the purity of the sound quality by bypassing
circuits such as balance control and tone control.
OFF (Line straight indicator off):
Line straight off/bypass off
ON (Line straight indicator on):
Line straight on/bypass on
• This button toggles the line straight function on and off.
The line straight indicator lights up when the line straight
is set to on.
When the line straight button is set to on, the balance
control, tone control, subsonic, monaural and loudness
cannot be adjusted.
13. Balance control (BALANCE)
Adjusts the relative volume of the right and left channels.
Rotating the control counterclockwise gradually cuts the
volume of the right channel, rotating the control clockwise
gradually cuts the volume of the left channel.
This knob should be set to the center position under normal
conditions, and rotated to make adjustment if necessary.
When the line straight function is set to on, this control does
not function.
14. Tone control for treble
TONE CONTROL (TREBLE)
Controls the frequency characteristics of the high-frequency
range.
Setting this control to the center position provides flat
frequency characteristics. Rotating this control clockwise
enhances the high-frequency range, and rotating this control
counterclockwise attenuates the high-frequency range.
When the line straight function is set to on, this control does
not function.
15. Tone control for middle-range
TONE CONTROL (MIDDLE)
Controls the frequency characteristics of the middle-
frequency range.
Setting this control to the center position provides flat
frequency characteristics. Rotating this control clockwise
enhances the middle-frequency range, and rotating this
control counterclockwise attenuates the middle-frequency
range. When the line straight function is set to on, this control
does not function.
16. Tone control for bass
TONE CONTROL (BASS)
Controls the frequency characteristics of the low-frequency
range.
Setting this control to the center position provides flat
frequency characteristics. Rotating this control clockwise
enhances the low frequency range and rotating this control
counterclockwise attenuates the low frequency range.
When the line straight function is set to on, this control does
not function.

6
Names and Functions
17. Speaker selector (SPEAKERS)
Selects either of 2 speaker systems, A or B, located at the
rear panel.
OFF: Used when listening only with headphones and
when not generating sound from speakers.
A (Center): Selects the A system speaker terminals.
B: Selects the B system speaker terminals.
A+B: Enables connection to 2 speaker systems.
When using 2 speaker systems simultaneously,
make sure they have an impedance of 8 ohms
or more because the both output terminals are
connected in parallel.
18. Cartridge selector (CARTRIDGE)
Selects the gain level of the equalizer amplifier (an amplifier
circuit necessary for playing an analog records).
MC-H/MC-L: Selects when using a low output voltage MC
(moving coil) type cartridge. Select MC-H/L
in accordance with the MC to use. The input
impedance of HC-H is 100 Ω and of MC-L is
40 Ω. When MC is selected while using an
MM type cartridge, be aware that the sound
volume becomes higher and an unbalanced
sound lacking high frequencies will be heard
owing to the incorrect impedance.
MM: Selects when using a high output voltage MM
(moving magnet) type cartridge.
Front panel
910111213141516
17
1819
5 86 71 2 43

7
INTEGRATED AMPLIFIER L-509Z
19. Separate button (SEPARATE)
Separates the pre-amplifier and main-amplifier each other.
OFF (Separate indicator off):
Returns this unit to normal integrated amplifier mode.
ON (Separate indicator on):
Feeds external signals from the MAIN IN terminal on
the rear panel to the main-amplifier section.
• This button toggles the separate on and off.
The separate indicator lights up when separate on is
selected.
When the separate button is set to on, the volume con-
trol of this unit cannot adjust the volume of the speakers
connected to this unit. Volume adjustment should be per-
formed at the input device side such as a control amplifier
connected to the MAIN IN terminal.
Connection from direct output into the MAIN IN terminal
from a CD player or other devices which don’t have a vol-
ume control always provides full power and accordingly
there is a risk of speaker damage.
For such input devices, be sure to use a control amplifier
equipped with volume adjustment, begin feeding audio to
the speakers with the volume low and adjust the volume to
your preferred level. When connecting devices to this unit,
be sure to turn off the power to prevent damage.

8
Names and Functions
1. Separate indicator (SEPARATE)
Lights up when the separate button is set to on.
2. Power meters
Indicate the output of the L channel on the left side and the
output of the R channel on the right side. The meter indi-
cates the output in decibels.
When the power is turned on, the meters light up.
3. Subsonic indicator (SUBSONIC)
Lights up when the subsonic button is on.
The subsonic, monaural and loudness functions can be
toggled only from the accessory remote control (RA-17A).
4. Standby indicator (STANDBY)
Lights up when the connected AC cable is plugged into a
wall socket and the operation button is set to off (standby
state).
When the power is turned on or the AC plug is disconnected
from a wall socket, this indicator is turned off. This indicator
blinks when the protection circuit is activated.
Display window
3
62
84 7 9
2 5
1

9
INTEGRATED AMPLIFIER L-509Z
5. Remote control infrared receiver (R)
Receives signals from the accessory remote control.
6. Sound volume indicator
Indicates the amount of volume attenuation in –dB.
7. Monaural indicator (MONO)
Lights up when the monaural button is on.
8. Loudness indicator (LOUDNESS)
Lights up when the loudness button is on.
The subsonic, monaural and loudness functions can be
toggled only from the accessory remote control (RA-17A).
9. Line straight indicator (LINE STRAIGHT)
Lights up when the line straight button is on.
When the line straight button is set to on, the subsonic,
monaural and loudness functions cannot be operated from
the supplied remote control.
If these buttons are pressed, the line straight indicator
blinks for 3 seconds to let you know these functions can-
not be operated.
If you would like to operate subsonic, monaural, or loud-
ness function, set the line straight switch to off, and then
operate such functions.

10
Names and Functions
1. Signal ground (Ground terminal)
(SIGNAL GROUND)
The ground terminal is for a device such as analog player
connected to this unit. This terminal is used to reduce noise
when other devices are connected. This terminal is not an
electrical safety feature.
2. Phono input terminals (PHONO)
Input terminals to connect an analog player.
Do not connect a CD player or other devices with high out-
put levels to these terminals.
CD or other line level signals will be distorted.
3. LINE-1, LINE-2, LINE-3, LINE-4 input
terminals (unbalanced) (LINE-1, LINE-2,
LINE-3, LINE-4)
Used for line level signal inputs from CD players, SACD
players, D/A converters, tuners, DVD players, TVs and
other such devices. The input sensitivity is 180 mV and the
impedance is 47 kΩ. Original high rigidity terminals are used
only for LINE-1 and LINE-2. These input terminals offer the
same functions.
4. Pre-out terminals
(PRE OUT-1, PRE OUT-2)
These terminals are used to access the pre-amplifier out-
put. A bi-amp or an active type sub-woofer connection
can be performed with a combination of an external power
amplifier because these terminals always provide output
regardless of on/off of the separate button.
Do not insert short-pin plugs into PRE OUT.
No sound will be generated.
Rear panel
1
12
2 3 4 6 7 8 9 10 115
13

11
INTEGRATED AMPLIFIER L-509Z
5. Main input terminals (MAIN IN)
Provide input to the main-amplifier section when the
pre-amplifier and main-amplifier are separated by setting
the separate button to on.
6. Balanced input terminals/INPUTS
(BAL LINE-1, BAL LINE-2)
The balanced type input terminals of the LINE level for an
XLR connector.
7. Phase inverter (PHASE)
Reverses the phase when the balance input terminals are
used. The phase should be corresponding to the phase of
the input device.
A: NORMAL position ①GROUND
②COLD (–)
③HOT (+)
B: INVERT position ①GROUND
②HOT (+)
③COLD (–)
8. Trigger input terminal (TRIGGER IN)
Connection to a device with a trigger output terminal to this
trigger input terminal enables this unit to switch to opera-
tion or standby modes in conjunction with the connected
device.
9. Trigger output terminal (TRIGGER OUT)
Connection of this trigger output terminal to a device hav-
ing a trigger input terminal enables the connected device
to turn to operation or standby in conjunction with this unit.
10. Control input terminal (CONTROL IN)
Connects a LUXMAN’s device with a control output terminal
using a commercially available 3.5 mm monaural mini-jack
cable. This connection enables the infrared receiver circuit
of the connected device to receive signals from the remote
control supplied with this unit and the remote control to
operate the device, too.
(The infrared receiver of this unit will not function.)
11. Control output terminal (CONTROL OUT)
Connects a LUXMAN’s device with a control input terminal
using a commercially available 3.5 mm monaural mini-jack
cable. This connection enables the infrared receiver of
this unit to receive signals from the remote control of the
connected device and the remote control to operate this
unit, too.
(The infrared receiver of the device whose input is connected
will not function.)
12. AC inlet (AC IN)
Connects the accessory power cable. The power should be
supplied from a household wall socket.
13. Speaker terminals (SPEAKERS)
Connects a speaker system.
Connect the left speaker terminal to the left side and the
right speaker terminal to the right side paying attention to
the polarity.
* It is possible to insert cables from below
as well as from above.
General type
terminal
• Do not bring the core wire of the speaker cable into con-
tact with the core wires of other speaker cables or the
metal parts of this unit. Failure to observe this may cause
a malfunction of this unit or the speakers.
• When the power of this unit is set to on, do not touch
the metal parts of the terminals or the core wires of the
cables. Failure to observe this may result in an electric
shock.

12
Connections
SPEAKER SYSTEM
(
A
)
L R L R
SPEAKER SYSTEM
(
B
)
–+ –+ –+ –+
CD/SACD PLAYER
ANALOG PLAYER
D/A CONVERTER

13
INTEGRATED AMPLIFIER L-509Z
Before Connecting
Before connecting other devices, connect the jack side of the
accessory power cable to the AC inlet of this unit.
When connecting, turn off the power switch of this unit and
the power supplies of auxiliary devices to prevent unex-
pected accidents that may be caused by noise.
Connecting to the power supply
Insert the accessory power supply cable plug into an AC
outlet on the wall of the listening room.
How to connect CD players, SACD players,
D/A converters, tuners and other devices
Connect between the output terminals of the CD player,
SACD player, D/A converter, tuner or other such input devices
and the LINE-1 input terminals of this unit with 2 (R and L) pin-
plug cables or balanced cables.
For LINE-2, LINE-3, and LINE-4 input terminals, connection
in the same fashion as the LINE-1 terminals.
How to connect speakers
Connect the left-channel speaker to the SPEAKERS-L terminal
and the right-channel speaker to the SPEAKERS-R terminal
on the rear panel of this unit.
Securely connect the !terminal of the speaker system to the
speaker terminal !(red) of this unit, and the @terminal of the
speaker system to the speaker terminal @(black) of this unit.
If the !and @terminals are connected in reverse to either the
right or left speaker systems, the acoustic phases of the sound
reproduced from the right and left speaker systems are also
reversed. In such a case, be aware that the low frequency
sound levels will be reduced and the acoustic stability will
worsen, thus failing in normal stereo playback.
How to connect between the trigger input
terminal and other devices
Use a commercially available 3.5 mm monaural mini-plug
cable to connect to a device with a trigger output terminal.
This connection enables this unit to turn to operation/standby
in conjunction with the connected device.
When connection is conducted from a product made by other
than LUXMAN, make sure that the trigger output is 12 V. The
trigger input of this unit should be 12 volts, the power con-
sumption is 13 mA.
How to connect between the trigger output
terminal and other devices
Use a commercially available 3.5 mm monaural mini-plug
cable to connect to a device with a trigger input terminal.
This connection enables the connected device to turn to
operation/standby in conjunction with this unit.
The maximum output current that can be supplied from this
unit is 12 V is 100 mA. Be aware that a malfunction may be
caused if a load more than the above is applied to this unit
by connecting such a device or causing a short circuit.

14
Connections
SPEAKER SYSTEM
(
A
)
L R L R
SPEAKER SYSTEM
(
B
)
–+ –+ –+ –+
CD/SACD PLAYER
ANALOG PLAYER
D/A CONVERTER

15
INTEGRATED AMPLIFIER L-509Z
How to connect an analog player
Connect the output terminals of an analog player and the
PHONO terminals of this unit with 2 (R and L) pin-plug cables.
For most analog players, the ground wire from the phono
motor or the tone arm should be connected to the ground
terminal of this unit.
This unit’s phono equalizer is compatible with MM and MC
cartridges. When an MC cartridge with low output voltage
is used, set the cartridge selector on the front panel to the
MC-H or MC-L position.
The output from an analog player equipped with its own
phono equalizer or from an independent phono equalizer
should be connected to the line input terminals of this unit.
How to connect PRE OUT/MAIN IN
terminals
Either the pre-amplifier or main-amplifier can be separately
used.
When the pre-amplifier or main-amplifier is used separately,
set the separate button on the front panel to on. When only
the pre-amplifier is used, connect the PRE OUT terminal of
this unit to the input terminal of another power-amplifier, and
when only the main-amplifier is used, connect the MAIN IN
terminal of this unit to the output terminal of another device.
When this amplifier is used without separating between the
pre-amplifier and main-amplifier, set the separate button on
the front panel to off, or no sound will be generated.
Do not insert short-pin plugs into PRE OUT. No sound will
be generated.

16
Operations
Before operation
1. Ensure that all connections have been correctly performed.
(Normal playback cannot be achieved with incorrect con-
nections of R, L, !or @.)
2. Before performing a power cycle or selecting an input, be
sure to set the sound volume indicator to the minimum
position (− − display).
Playback procedure
1. Turn on the operation button. Check the sound volume
indicator when the unit is in the muting mode (blinking) and
decrease the sound volume according to your need.
2. Select a source with the input selector.
3. Adjust the sound level with the volume control.
4. Operate the line straight button, balance control and tone
controls according to taste.
Line straight selection
The line straight button is used to reproduce audio via the
shortest audio signal route for enhancing the clarity of the
source selected. When this button is set to on, the balance
control, tone controls, subsonic, monaural and loudness
functions are bypassed.
Balance control operation
The balance control enables users to adjust the balance of
sound volume between the right and left channels.
When the balance adjustment is not required, the balance
control should be set to the center position.
When the line straight button is set to on, the balance control
will not function.
Tone controls
This unit has a tone controls for the low, middle, and high
frequency ranges.
The low frequency range is effective at 300 Hz or lower. This
tone control has flat frequency characteristics at the center
position. Rotating the control clockwise enhances the low-
frequency range, and rotating the control counterclockwise
attenuates the low-frequency range.
The tone control for the middle-frequency range is to change
the range centering around 760 Hz. This tone control is set to
flat frequency characteristic at the center position. Rotating
the control clockwise enhances the middle-frequency range,
and rotating the control counterclockwise attenuates the
middle-frequency range.
The high frequency range is effective at 3 kHz or higher. This
tone control is set to flat frequency characteristic at the center
position. Rotating the control clockwise enhances the high-
frequency range, and rotating the control counterclockwise
attenuates the high-frequency range.
These adjustments work on both the right and left channels in
synchronization with each other.
When the line straight button is set to on, the tone control
does not function.

17
INTEGRATED AMPLIFIER L-509Z
Memory
This unit stores the following items when the power is off:
Item Default
INPUT Selected source
METER on/off
Sound volume indicator on/off
SUBSONIC on/off
MONO on/off
LOUDNESS on/off
LINE STRAIGHT on/off
SEPARATE on/off
Volume level Set dB value
Memory reset
All settings can be restored to the factory defaults by the
following steps:
(1) Turn off the power of this unit.
(2) Hold down the operation button on the main unit for
5seconds or more and press the line straight button on
the front panel once while holding down the operation
button.
The power state will switch from on to off.
This will fully reset the memory.
Factory default
Item Default
INPUT LINE-1
METER on
Sound volume indicator on
SUBSONIC on
MONO off
LOUDNESS off
LINE STRAIGHT off
SEPARATE off
Volume level Minimum (mute/− − display)

18
How to use Remote Control
Remote control (RA-17A)
1. Operation button (OPERATION)
Turns the power on and off (standby state). When wiring
or connection is performed, be sure to turn off this button.
2. Input selector
(LINE-1, LINE-2, LINE-3, LINE-4, BAL-1,
BAL-2, PHONO, MONITOR)
Selects between input sources from among the input termi-
nals on the rear panel consisting of LINE-1, LINE-2, LINE-3,
LINE-4 and PHONO or the balanced BAL LINE-1 and BAL
LINE-2 input.
For reference, MONITOR has no effect on this unit.
3. Monaural button (MONO)
Mixes the signals from the right and left channels into
mono. The monaural indicator lights up when this button
is pressed.
Press the button again to turn off the monaural effect and
reproduce a regular stereo output.
* When the line straight button is set to on, this button will
not function.
4. Separate button (SEPARATE)
Separates the pre-amplifier and main-amplifier sections
from each other.
OFF (Separate indicator on):
Returns this unit to normal integrated amplifier mode.
ON (Separate indicator off):
Feeds external signals from the MAIN IN terminal on
the rear panel to the main-amplifier section.
• Holding down this button for 1 second toggles the
SEPARATE state on and off.
The separate indicator lights up when separate on is
selected.
5. Mute button (MUTE)
When this button is pressed and the mute function is
activated, and the operation indicator will start blinking and
there will be no audio output. Pressing this button again
sets the mute function to off.
6. Meter button (METER)
Turns off the meter lights. The meter lights and sound vol-
ume indicator are turned off.
Pressing this button changes the state as follows:
Sound volume indicator off Meter lights off
Sound volume indicator on and meter lights on
When the sound volume is operated while the sound vol-
ume indicator is in the off state, the sound volume indicator
is turned on for approx. 4 seconds and then turned off.
1
2
4
5
11
10
9
8
6
3
7