LINEAR SOUND LTS.P62 User manual
Linear Technologie • 11 rue du Puits Rochefort • 42 100 Saint-Etienne
Tél: +33 (0)4 77 81 49 49 • Fax: +33 (0)4 77 81 49 40 • www.lineartech.fr V.2017
PRE-AMPLIFIER LTS.P62
Operation manual
Please follow the instructions in this manual to obtain the optimum results from this unit.
We also recommend that you keep this manual handy for future reference.
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1. Safety precautions
2. General description
3. Features
4. Nomenclature and functions
a. Front panel
b. Rear panel
5. Operation illustration
a. Power LED and power switch
b. Power input
c. Channel line jack output (XLR)
d. REC audio input interface
e. LINE (1~4) line inputs
f. Alarm signal input circuit
g. MIC1 / MIC2 input and stubs address code switch
6. Equipment inner drawing
7. Installation steps
8. Connection diagram
9. Block diagram
10. Specications
11. Dimensional diagram
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TABLE OF CONTENTS
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• Be sure to read the instructions in this section carefully before use.
• Make sure to observe the instructions in this manual as the conventions of safety
symbols and messages regarded as very important precautions are included.
• We also recommend you keep this instruction manual handy for future reference.
Safety symbol and message conventions
Safety symbols and messages described below are used in this manual to prevent bodily
injury and property damage which could result from mishandling. Before operating your
product, read this manual rst and understand the safety symbols and messages so you are
thoroughly aware of the potential safety.
Warning
When installing the unit
• Do not expose the unit to rain or an environment where it may be splashed by water or
other liquids,as doing so may result in re or electric shock.
• Use the unit only with the voltage specied on the unit. Using a voltage higher than that
which is specied may result in re or electric shock.
• Do not cut, kink, otherwise damage nor modify the power supply cord. In addition,
avoid using the power cord in close proximity to heaters, and never place heavy objects
(including the unit itself) on the power cord, as doing so may result in re or electric
shock.
• Be sure to replace the unit’s terminal cover after connection completion. Because high
voltage is applied to the speaker terminals, never touch these terminals to avoid electric
shock.
• Be sure to ground to the safety ground (earth) terminal to avoid electric shock. Never
ground to a gas pipe as a catastrophic disaster may result.
• Avoid installing or mounting the unit in unstable locations, such as on a rickety table or a
slanted surface. Doing so may result in the unit falling down, causing personal injury and
/ or property damage.
When the unit is in use
• Should the following irregularity be found during use, immediately switch o the power,
disconnect the power supply plug from the AC outlet and contact your nearest dealer.
Make no further attempt to operate the unit in this conditions this may cause re or
electric shock, ...
- If you detect smoke or a strange smell coming from the unit.
- If water or any metallic object gets into the unit.
- If the unit falls, or the unit case breaks.
- If the power supply cord is damaged (exposure of the core, disconnection, etc)
- If it is malfunctioning (no tone sounds)
1. SAFETY PRECAUTIONS
WARNING Indicates a potentially hazardous situation which, if mishandled,
could result in death or serious personal injury.
CAUTION
Indicates a potentially hazardous situation which, if mishandled,
could result in moderate or minor personal injury, and/or property
damage.
4
• To prevent a re or electric shock, never open or remove the unit case as there are high
voltage components inside the unit. Refer all servicing to your nearest dealer.
• Do not place cups, bowls, or other containers of liquid or metallic objects on top of the
unit. If they accidentally spill into the unit, this may cause a re or electric shock.
• Do not insert nor drop metallic objects or ammable materials in the ventilation slots of
the unit’s cover, as this may result in re or electric shock.
Caution
When installing the unit
• Never plug in nor remove the power supply plug with wet hands, as doing so may cause
electric shock.
• When unplugging the power supply cord, be sure to grasp the power supply plug; never
pull on the cord itself. Operating the unit with a damaged power supply cord may cause
a re or electric shock.
• When moving the unit, be sure to remove its power supply cord from the wall outlet.
Moving the unit with the power cord connected to the outlet may cause damage to the
power cord, resulting in re or electric shock. When removing the power cord, be sure to
hold its plug to pull.
• Do not block the ventilation slots in the unit’s cover. Doing so may cause heat to build up
inside the unit and result in re.
• Avoid installing the unit in humid or dusty locations, in locations exposed to the direct
sunlight, near the heaters, or in locations generating sooty smoke or steam as doing
otherwise may result in re or electric shock.
When the unit is in use
• Should the following irregularity be found during use, immediately switch o the power,
disconnect the power supply plug from the AC outlet and contact your nearest dealer.
Make no further attempt to operate the unit in this conditions this may cause re or
electric shock, ...
• To prevent a re or electric shock, never open or remove the unit case as there are high
voltage components inside the unit. Refer all servicing to your nearest dealer.
• Do not place cups, bowls, or other containers of liquid or metallic objects on top of the
unit. If they accidentally spill into the unit, this may cause a re or electric shock.
• Do not insert nor drop metallic objects or ammable materials in the ventilation slots of
the unit’s cover, as this may result in re or electric shock.
• Do not place heavy objects on the unit as this may cause it to fall or break which may
result in personal injury and/or property damage. In addition, the object itself may fall o
and cause injury and / or damage.
• Make sure that the volume control is set to minimum position before power is switched
on. Loud noise produced at high volume when power is switched on can impair hearing.
• Do not operate the unit for an extended period of time with the sound distorting. This is
an indication of a malfunction, which in turn can cause heat to generate and result in a
re.
• Contact your dealer as to the cleaning. If dust is allowed to accumulate in the unit over a
long period of time, a re or damage to the unit may result.
• If dust accumulates on the power supply plug or in the wall AC outlet, a re may result.
Clean it periodically. In addition, insert the plug in the wall outlet securely.
• Switch o the power, and unplug the power supply plug from the AC outlet for safety
purposes when cleaning or leaving the unit unused for 10 days or more. Doing otherwise
may cause a re or electric shock.
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1. MIC1 volume control
2. MIC1 treble adjustment : The treble response, clockwise rotation, MIC1 increase treble
output , whereas reduced.
3. MIC1 bass tone adjustment : Adjust the bass response , clockwise rotation, MIC1
increase treble output, whereas reduced.
4. MIC2 volume control
5. MIC2 treble adjustment
6. MIC2 bass adjustment
7. Line channels selector (L1 ~ L4)
8. Line volume control
9. Line treble control
10. Line bass control
11. Left and right volume control
12. Left channel control
This series two-channel pre-amplier with the latest styles to meet the needs of small and
medium sized public address system. Two-channel pre-amplier has 2 inputs at the same
time, enhance the audio signal simultaneously . Two-channel audio pre-amplier is the
connector of all audio sources (including common sources such as CD drive, modem, sound
recording deck , MP3 players , special audio alarm and a variety of microphones ) and the
power amplier devices. The volume of each input source can be adjusted independently,with
priority ranking function,which can require the input source to priorities. Two-channel pre-
amplier has sound quality control functions,such as through its ring tone control circuit or
other control circuit, to regulate and control the frequency characteristics of signals,to play
modied and beautify the sound and meet the requirements of the listener’s preferences.
• Standard chassis design, 1U aluminium alloy; light equipment, simple operation, artistic
and practical.
• Each input independent volume and treble /bass volume adjustment.
• MIC 1-2 balanced microphone inputs with +48 phantom power switch and gain adjustment.
• With alarm generator, to provide for the paging tone.
• LINE 1-4 line input with gain adjustment.
• REC has a left and right channel audio input and balance left and right channels output
control.
• MIC 1 ~ MIC 2 input priority to other.
2. GENERAL DESCRIPTION
3. FEATURES
4. NOMENCLATURE AND FUNCTIONS
a. Front panel
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When the power switch to “ON” , power light becomes blue.
When the power switch to “OFF” , power light extinguish.
Note : In order to work properly, equipment must be conrmed in a normal power state. If
the machine fails, please contact the vendor.
13. Left channel level indicator
14. Right channel level indicator
15. Power switch
16. Power LED (blue)
b. Rear panel
17. ~ 230V / 50 Hz power input
18. Left and right channel line outputs (XLR)
19. Left and right channel audio input (REC)
20. Line input (LINE1 ~ LINE2)
21. Alarm signal input circuit
22. MIC (1 ~ 2) +48 V phantom power dial the code switch and priority function control
23. MIC (1 ~ 2) phantom microphone input
24. MIC (1 ~ 2) GAIN : Gain adjustment
25. MIC (1-2) output switch
26. LINE (1 ~ 4) GAIN : Gain adjustment
5. OPERATION ILLUSTRATION
a. Power LED and power switch
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Power is to provide energy to equipment, must be safe use of power supply, don’t use it,
please pull power.
Note : When used it, must use the security power input within the stipulated scope, avoid
causing accidents.
L/R OUTPUTL / R OUTPUT line out, two channel selectable. All output should be connected
to the jack on the rear panel of the machine. Volume control is done by the left and right
volume knobs and each with a row of signal lights, can understand the level of the signal
outputs. This feature allows pure power amp to work as pre-amplier with the extensions
amplier feature.
Note : L / R OUTPUT line out, you must rst volume to mid-range position, to avoid the
sound exposure.
b. Power input
c. Channel line jack output (XLR)
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REC recording deck input interface, Left and right channel selectable. REC audio input
interfaces to deck machine.
Note : When REC inputs, you must rst volume to mid-range position, to avoid the sound
exposure.
LINE (1 ~ 4) line input , adjustable L (1 ~ 4) switches and control the LINE (1 ~ 4) line inputs.
Line input signal can be adjusted by the volume knobs and the BASS/TREBLE control. At
the same time, LINE (1 ~ 4) line input, you can adjust the GAIN volume. By adjusting the
GAIN size, you can control the input gain between 20 ~ 0 dB. LINE (1 ~ 4) line in the formula
audio line input for connecting CD / MP3 / TUNER equipment running.
Note :
1.When using the line input, you must rst volume to mid-range position, to avoid the sound
exposure
2.Please avoid multiple audio input at the same time or it will cause noise.
d. REC audio input interface
e. LINE (1~4) line inputs
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Alarm signal input circuit, when the circuit is disconnected and closed signal, alarm will be
triggered. The volume of the alarm depends on the input level.
Note : Please turn the volume to mid-range position, to avoid the sound exposure.
MIC1 / MIC2 balanced microphone input, volume size is determined by the panel MIC 1/
MIC 2 knob control, combined with BASS / TREBLE adjust the volume knob to achieve
the desired acoustic eect. MIC1 / MIC2 Use a balanced microphone input, adjustable
phantom address priorities and can be manually controlled. When the address code (1,2)
switch, open the”1” address code, means the MIC 1 has priority over MIC2 and LINE inputs
1-4 input. Open the “2” address code, means MIC 2 has priority over MIC1. When the
+48 phantom power address code (3,4) switch, open the “3” address code, said the MIC
2 balanced microphone with power supply to the dynamic microphones;; when the +48
phantom switch, open the “4” address code, MIC 2 balanced microphone without power
supply to the dynamic microphones. Besides, MIC (1 ~ 2) the has the gain control. GAIN
control is between 20 ~ 60dB.
Note :
1. When using the microphone input, you must rst volume to mid-range position, to avoid
sending the sound exposure.
2. Microphone input priority must rst adjust address code. Otherwise, the priority can not
be controlled.
3. Must ensure that the microphone is fully inserted, otherwise the call function can not be
achieved.
f. Alarm signal input circuit
g. MIC1 / MIC2 input and stubs address code switch
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1. Firstly, install board inside the machine with wiring.
2. After install the back panel and oor with screws.
3. Then install equipment panel.
4. Finally, to install cover.
Note :
1. The equipment adopts 4 x 4 mm screws.
2. When installation, keep equipment clean.
3. Undertake certain temperature conditions, installing equipment.
6. EQUIPMENT INNER DRAWING
7. INSTALLATION STEPS
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8. CONNECTION DIAGRAM
9. BLOCK DIAGRAM
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Frequency response 20 Hz - 20 kHz +/- 0.5 dB
Sensitivity 195 mV (-12 dBu) to 2.0V (+8 dBu)
Input impedance 47k ohms
Input gain control 20 dB range
Distortion <0.05% 20 Hz - 20 kHz
Noise -90 dB A weighted (0 dB gain)
Equalisation TREBLE : 10 dB / 10k Hz BASS : +/- 10 dB / 100 Hz
Microphone 1 - 2 inputs
Frequency response 100 Hz / -3 dB (lter) 20 kHz 0.5 dB
Distortion <0.05% 20 Hz - 20 kHz
Gain range 10 dB - 50 dB
Input impedance > 2k ohms (balanced)
Phantom power +15V (PCB jumper for on / o)
Equalisation TREBLE : +/- 10 dB / 5 kHz BASS : +/- 10 dB / 100 Hz
Noise -65 dB A weighted
Outputs
Balanced zone outputs 775 mV (0 dBu) 3 pin “Phoenix” type connector
Max. output level +20 dBu (7.75V)
Min. load impedance 600 ohms
REC output level -12 dBu (200 MV)
Else
Power input ~230V / 50 Hz
Fuse rating Z8 : 230V T125 mA H 115V T250 mA H
Dimensions 484 x 300 x 44 mm (1U)
Weight 3.9 kg
10. SPECIFICATIONS
Keep the unit’s all sides over 10 cm away from
objects that may obstruct air ow to prevent
the unit’s internal temperature rise.
11. DIMENSIONAL DIAGRAM
Linear Technologie • 11 rue du Puits Rochefort • 42 100 Saint-Etienne
Tél: +33 (0)4 77 81 49 49 • Fax: +33 (0)4 77 81 49 40 • www.lineartech.fr
Table of contents
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