LT6A - LT8A - LT10A
LT12A- LT15A - LT215A
Ac ve Loudspeakers
USER MANUAL
FCC COMPLIANCE NOTICE
This device complies with part 15 of the FCC rules. Opera on is subject to the following two condi ons:
(1) This device may not cause harmful interference, and
(2) this device must accept any interference received, including interference that may cause undesired opera on.
CAUTION: Changes or modif ca. ons not expressly approved by the party responsible for compliance could void
the user’s authority to operate the equipment.
NOTE: This equipment has been tested and found to comply with the limits for a Class B digital device, pursuant to
part 15 of the FCC Rules. These limits are designed to provide reasonable protec on against harmful interference in
a residen al installa on. This equipment generates, uses, and can radiate radio frequency energy and, if not installed
and used in accordance with the instruc on manual, may cause harmful interference to radio communica ons.
However, there is no guarantee that interference will not occur in a par cular installa on. If this equipment does
cause harmful interference to radio or television recep on, which can be determined by turning the equipment off
and on, the user is encouraged to try to correct the interference by one or more of the following measures:
• Reorient or relocate the receiving antenna.
• Increase the separa on between the equipment and receiver.
• Connect the equipment into an outlet on a circuit diff erent from that to which the receiver is connected.
• Consult the dealer or an experienced radio/TV technician for help.
This marking shown on the product or its literature, indicates that it should not be disposed with other household wastes at the end of
its working life. To prevent possible harm to the environment or human health from uncontrolled waste disposal, please separate this
from other types of wastes and recycle it responsibly to promote the sustainable reuse of material resources. Household users should
contact either the retailer where they purchased this product, or their local government offi ce, for details of where and how they can
take this item for environmentally safe recycling. Business users should contact their supplier and check the terms and condi ons of the
purchase contract. This product should not be mixed with other commercial wastes for disposal.
The lightning fl ash with arrowhead symbol within an equilateral triangle is intended to alert the user to the presence of uninsulated
“dangerous voltage” within the product’s enclosure, that may be of suffi cient magnitude to cons tute a risk of electric shock to persons.
The exclama on point within an equilateral triangle is intended to alert the user to the presence of important opera ng and maintenance
(servicing) instruc ons in the literature accompanying the appliance.
The informaon contained in this publicaon has been carefully prepared and checked. However no responsibility will be taken for any errors.
All rights are reserved and this document cannot be copied, photocopied or reproduced in part or
completely without wrien consent being
obtained in advance from CELECTRON. CELECTRON reserves the right to make any aesthe c, funconal or design modifi caon to any of its
products without any prior noce. CELECTRON assumes no responsibility for the use or applicaon of the products or circuits described here in.
3
INDEX
TECHNICAL SPECIFICATIONS . . . . . . . . . . . . . . . . . 4
FREQUENCY RESPONSE . . . . . . . . . . . . . . . . . . . . . 4
DIMENSIONS AND FLYING POINTS . . . . . . . . . . . . . 5
LT6A CONTROL PANEL (FIG.1) . . . . . . . . . . . . . . . . 7
LT8A CONTROL PANEL (FIG.2) . . . . . . . . . . . . . . . . 7
LT10A / LT12A / LT15A / LT215A
CONTROL PANEL (FIG.3) . . . . . . . . . . . . . . . . . . . . . 8
CONNECTIONS (FIG.4) . . . . . . . . . . . . . . . . . . . . . . 8
CONFIGURATIONS (FIG.5) . . . . . . . . . . . . . . . . . . . 9
SAFETY AND PRECAUTIONS . . . . . . . . . . . . . . . . . 10
IN CASE OF FAULT . . . . . . . . . . . . . . . . . . . . . . . . . 10
TROUBLESHOOTING . . . . . . . . . . . . . . . . . . . . . . . 10
CE CONFORMITY . . . . . . . . . . . . . . . . . . . . . . . . . . 11
PACKAGING, SHIPPING AND COMPLAINT . . . . . . 11
WARRANTY AND PRODUCTS RETURN . . . . . . . . . 11
INSTALLATION AND DISCLAIMER . . . . . . . . . . . . . 11
POWER SUPPLY AND MAINTENANCE . . . . . . . . . 11
GENERAL INFORMATION . . . . . . . . . . . . . . . . . . . 12
INSTRUCTIONS (FIG. 1 / 2 / 3 / 4 / 5) . . . . . . . . . . 12
4
FREQUENCY RESPONSE
LT6A
MODEL LT6A LT8A LT10A LT12A LT15A LT215A
System type 2-way vented enclosure 2-way vented enclosure 2-way vented enclosure 2-way vented enclosure 2-way vented enclosure 2-way vented enclosure
High Frequency Device 1’’ neodymium tweeter 1’’ compression driver
1" VC
1’’ compression driver
1.35" VC
1’’ compression driver
1.35" VC
1’’ compression driver
1.35" VC
1’’ compression driver
1.35" VC
Low Frequency Device 6.5” woofer with 1" VC 8” woofer with 1.5" VC 10” woofer with 2" VC 12” woofer with 2.5" VC 15” woofer with 2.5" VC 2x 15” woofer with 2.5"
VC
Angular Coverage 60° H x 40° V 60° H x 40° V 90° H x 60° V 90° H x 60° V 90° H x 60° V 90° H x 60° V
Total peak power
400 W 600 W 800 W 1000 W 1200 W 1600 W
HF Amplifi er Power
200 W Class AB
100 W Class D 100 W Class AB 100 W Class AB 150 W Class AB 150 W Class AB
LF Amplifi er Power
200 W Class D 300 W Class D 400 W Class D 450 W Class D 650 W Class D
Power Supply type LINEAR SMPS SMPS SMPS SMPS SMPS
Frequency Response 75 Hz - 20 kHz 70 Hz - 20 kHz 60 Hz - 20 kHz 50 Hz - 20 kHz 45 Hz - 20 kHz 45 Hz - 20 kHz
Processing Analog Analog Analog Analog Analog Analog
Max SPL at 1mt (peak)
114 dBspl 125 dBspl 127 dBspl 130 dBspl 132 dBspl
Crossover Frequency 2400 Hz 2200 Hz 2000 Hz 2000 Hz 2000 Hz
Input Impedance 30 kohm balanced
15 kohm unbalanced
30 kohm balanced
15 kohm unbalanced
30 kohm balanced
15 kohm unbalanced
30 kohm balanced
15 kohm unbalanced
30 kohm balanced
15 kohm unbalanced
Input Sensi vity LINE: 0/-10 dBu / MIC:
-20 dBu
LINE: +4 dBu / MIC: -20
dBu
LINE: +4 dBu / MIC: -20
dBu
LINE: +4 dBu / MIC: -20
dBu
LINE: +4 dBu / MIC: -20
dBu
Controls MIC/LINE, LEVEL MIC/LINE, LEVEL, LOW,
HIGH, GND.
MIC/LINE, LEVEL, LOW,
HIGH, GND.
MIC/LINE, LEVEL, LOW,
HIGH, GND.
MIC/LINE, LEVEL, LOW,
HIGH, GND.
Connectors MIC/LINE: Combo
XLR-F / JACK,
LINE: RCA, LINK: XLR-M
MIC/LINE: Combo
XLR-F / JACK
LINK: XLR-M
MIC/LINE: Combo
XLR-F / JACK
LINK: XLR-M
MIC/LINE: Combo
XLR-F / JACK
LINK: XLR-M
MIC/LINE: Combo
XLR-F / JACK
LINK: XLR-M
Power Supply 230 V~ or 120 V~ - 50/60 Hz230 V~ or 120 V~ - 50/60 Hz230 V~ or 120 V~ - 50/60 Hz230 V~ or 120 V~ - 50/60
Hz230 V~ or 120 V~ - 50/60
Hz
Rated Consump on
150 W 200 W 400 W 400 W 400 W
Construc on Plywood Plywood Plywood Plywood Plywood
Cabinet Colour Black Black Black Black Black
Flying System 1 x M4 top / 2 x M4
bo om
4 x M8 top/bo om 4 x M10 top/bo om 4 x M10 top/bo om 4 x M10 top/bo om
Handles - 1 x rear 1 x rear 2 x sides 2 x sides
Moun ng Pole 1 x bo om 1 x bo om, dual angle 1 x bo om, dual angle 1 x bo om, dual angle 1 x bo om, dual angle
Weight 5.9 kg (13 lb) 8.5 kg (18.7 lb) 12.5 kg (27.6 lb) 16.5 kg (36.4 lb) 21 kg (46.3 lb)
Dimensions (W x H x D) 204 x 295 x 223 mm 220 x 442 x 260 mm 340 x 515 x 310 mm 380 x 595 x 360 mm 448 x 670 x 410 mm
138 dBspl
2000 Hz
30 kohm ba lanced
15 kohm unbalanced
LINE: +4 dBu / MIC: -20
dBu
MIC/LINE, LEVEL, LOW,
HIGH, GND.
MIC/ LINE: Combo
XLR-F / JACK
LINK: XLR-M
230 V~ or 120 V~ - 50/60
Hz
800 W
Plywood
Black
4 x M10 top/bo om
2 x sides, 1 x top
1 x bo om
34 kg (74.9 lb)
448 x 1060 x 450 mm
TECHNICAL SPECIFICATIONS
10k5k2k1k5002001005040 20kHz
120.0
dBSPL
110.0
100.0
90.0
80.0
70.0
10k5k2k1k5002001005040 20kHz
120.0
dBSPL
110.0
100.0
90.0
80.0
70.0
10k5k2k1k5002001005040 20kHz
120.0
dBSPL
110.0
100.0
90.0
80.0
70.0
10k5k2k1k5002001005040 20kHz
120.0
dBSPL
110.0
100.0
90.0
80.0
70.0
10k5k2k1k5002001005040 20kHz
120.0
dBSPL
110.0
100.0
90.0
80.0
70.0
10k5k2k1k5002001005040 20kHz
120.0
dBSPL
110.0
100.0
90.0
80.0
70.0
LT12A
LT8 A
LT1 5A
LT1 0A
LT215A
5
DIMENSIONS AND FLYING POINTS
20.4 cm
8.0"
22.0 cm
8.7"
34.0 cm
13.4"
51.5 cm
20.3"
31.0 cm
12.2"
44.2 cm
17.4"
26.0 cm
10.2"
22.3 cm
8.8"
29.5 cm
11.6"
M4 Flying Point
M8 Flying Point
Dual angle
MounƟng Pole
Dual angle
MounƟng Pole
M10 Flying Point
LT6 Pole adapter (supplied)
LT6A
LT8A
LT10A
6
38.0 cm
14.9"
44.8 cm
17.6"
44.8 cm
17.6"
36.0 cm
14.2"
59.5 cm
23.4"
41.0 cm
16.1"
67.0 cm
26.4"
45.0 cm
17.7"
106.0 cm
41.7"
M10 Flying Point
M10 Flying Point
M10 Flying Point
Dual angle
MounƟng Pole
Dual angle
MounƟng Pole
MounƟng Pole
LT12A
LT15A
LT215A
7
LT6A CONTROL PANEL (FIG.1)
LT8A CONTROL PANEL (FIG.2)
8
CONNECTIONS (FIG.4)
INPUT
Jack (balanced)
sleeve - ground
tip - hot
ring - cold
INPUT
Balanced male XLR
ground
hot
cold
INPUT
Jack (unbalanced)
ground
tip - hot
cold
*note: connect both cold and ground
to make cable from balanced to unbalanced
LINK (output)
Balanced female XLR
ground
hot
cold
LT10A / LT12A / LT15A / LT215A
CONTROL PANEL (FIG.3)
9
CONFIGURATIONS (FIG.5)
R
L
RIGHT
LT6A/LT8A/LT10A/
LT12A/LT15A/LT215A
LEFT
LT6A/LT8A/LT10A/
LT12A/LT15A/LT215A
stereo basic system
2x LT loudspeaker
LT6A/LT8A/LT10A/
LT12A/LT15A/LT215A
(mic in) single voice system
LT6A/LT8A/LT10A/
LT12A/LT15A/LT215A
(mic in) single voice system
basic
conference
system
set this switch as “MIC”
use preferably balanced cables
10
SAFETY AND PRECAUTIONS
• CAUTION: before using this product read carefully the following safety instruc ons. Take a look of this manual en rely and preserve it for
future reference.
When using any electric product, basic precau ons should always be taken, including the following:
– To reduce the risk, close supervision is necessary when the product is used near children.
– Protect the apparatus from atmospheric agents and keep it away from water, rain and high humidity places.
– This product should be site away from heat sources such as radiators, lamps and any other device that generate heat.
– This product should be located so that its loca on or posi on does not interfere with its proper ven la on and hea ng dissipa on.
– Care should be taken so that objects and liquids do not go inside the product.
– The product should be connected to a power supply mains line only of the type described on the opera ng instruc ons or as marked on the
product. Connect the apparatus to a power supply using only power cord included making always sure it is in good condi ons.
–
WARNING: The mains plug is used as disconnect device, the disconnect device shall remain readily operable.
– Do not cancel the safety feature assured by means of a polarized line plug (one blade wider than the other) or with a earth connec on.
– Make sure that power supply mains line has a proper earth connec on.
– Power supply cord should be unplugged from the outlet during strong thunderstorm or when le unused for a long period of me.
– Do not place objects on the product’s power cord or place it in a posi on where anyone could trip over, walk on or roll anything over it. Do not
allow the product to rest on or to be installed over power cords of any type. Improper installa ons of this type create the possibility of fi re hazard
and/or personal injury.
– This product may be capable of producing sound levels that could cause
permanent hearing loss. Exposure to extremely high noise levels may cause
permanent hearing loss. Individuals vary considerably in suscep bility to noise-
induced hearing loss, but nearly everyone will lose some hearing if exposed
to sufficiently intense noise for a period of time. The U.S. Government’s
Occupational Safety and Health Administration (OSHA) has specified the
permissible noise level exposures shown in the following chart. According to
OSHA, any exposure in excess of these permissible limits could result in some
hearing loss. To ensure against poten ally dangerous exposure to high sound
pressure levels, it is recommended that all persons exposed to equipment
capable of producing high sound pressure levels use hearing protectors while
the equipment is in opera on. Ear plugs or protectors in the ear canals or over
the ears must be worn when opera ng the equipment in order to prevent
permanent hearing loss if exposure is in excess of the limits set forth here. Keep
your's a en on that children and pets are more suscep ble to excessive noise
levels.
IN CASE OF FAULT
• In case of fault or maintenance this product should be inspected only by qualifi ed service personnel when:
– There is a fl aw either in the connec ons or in the supplied connec ng cables.
– Liquids have spilled inside the product.
– The product has fallen and been damaged.
– The product does not appear to operate normally or exhibits a marked change in performance.
– The product has been lost liquids or gases or the enclosure is damaged.
• Do not operate on the product, it has no user-serviceable parts inside, refer servicing to an authorized maintenance centre.
TROUBLESHOOTING
No Power • The loudspeaker's "POWER" switch is off .
• Make sure the mains AC outlet is live (check with a tester or a lamp).
• Make sure the mains plug is securely plugged into mains AC outlet.
No Sound • Is the input LEVEL control for the channel turned up?
• Is the SIGNAL LED illuminated? If not check if your signal level is too low or check the signal cable, mixer and other
equipment se ng and cabling.
• Are you sure your signal cables works properly? check it using a cable tester or replacing with a new one.
• Is the SPEAKON cable connector correctly inserted? turn it clockwise un l it clicks.
• Are you sure your power cable works properly? check it using a cable tester or replacing with a new one.
Distorted Sound • Input signal level is too high. Turn down your level controls.
NOTE: The loudspeakers should never be operated at a level which causes the amplifi er Clip LEDs to illuminate
constantly.
Diff erent channel
level
• Check if are using a balanced cable for one channel and an unbalanced one for the other, as this would cause a
considerable diff erence in channel levels.
• Be sure that your loudspeaker system is fully connected and both loudspeakers have the same impedance.
Noise / Hum • Enable GND LIFT bu on on rear panel, if the problem persist press all GND LIFT bu ons for all system's amplifi ers.
• Whenever possible, preferably use only balanced cables. Unbalanced lines may also be used but may result in noise
over long cable runs.
• Some mes it helps to plug all audio equipment into the same AC circuit so they share a common ground.
Dura on Per Day
In Hours
Sound Level dBA
Slow Response
Typical
Example
8 90 Duo in small club
692
4 95 Subway Train
397
2 100 Very loud classical music
1.5 102
1 105 Traffi c noise
0.5 110
0.25 or less 115 Loudest parts at a rock concert
11
CE CONFORMITY
• Celectron products comply with direc ve 2004/108/EC (EMC), as stated in EN 55103-1 and EN 55103-2 standards and with direc ve
2006/95/CE (LVD), as stated in EN 60065 standard.
• Under the EM disturbance, the ra o of signal-noise will be changed above 10dB.
PACKAGING, SHIPPING AND COMPLAINT
• This unit package has been submi ed to ISTA 1A integrity tests. We suggest you control the unit condi ons immediately a
er unpacking it.
• If any damage is found, immediately advise the dealer. Keep all unit packaging parts to allow inspec on.
• Celectron is not responsible for any damage that occurs during shipment.
• Products are sold “delivered ex warehouse” and shipment is at charge and risk of the buyer.
• Possible damages to unit should be immediately no fi ed to forwarder. Each complaint for package tampered with should be done within
eight days from product receipt.
WARRANTY AND PRODUCTS RETURN
• Celectron products have operang warranty and comply their specificaons, as stated by manufacturer.
• Celectron warrants all materials, workmanship and proper opera
on of this product for a period of two years from the original date of
purchase. If any defects are found in the materials or workmanship or if the product fails to func on properly during the applicable warranty
period, the owner should inform about these defects the dealer or the distributor, providing receipt or invoice of date of purchase and defect
detailed descrip on. This warranty does not extend to damage resul ng from improper installa on, misuse, neglect or abuse. Celectron Electronic
will verify damage on returned units, and when the unit has been properly used and warranty is s ll valid, then the unit will be replaced or
repaired. Celectron Electronic is not responsible for any "direct damage" or "indirect damage" caused by product defec veness.
INSTALLATION AND DISCLAIMER
• Celectron products have been expressly designed for audio applicaon, with signals in audio range (20Hz to 20kHz). Celectron has no liability for
damages caused in case of lack of maintenance, modificaons, improper use or i
mproper installa on non-applying safety instrucons.
• The installa on of these speakers is provided for indoors, in case of use outdoors be sure that the speakers are installed correctly in a
safe loca on protected from wind, rain and humidity. To avoid performance deteriora on of mechanical, acous cs and electrical parts is not
advisable to leave these speakers exposed outdoors for a long period of me, so we suggest a temporary installa on for the limited sound
events.
• The installaon of these speakers is provided for floor or by means of specific stands able to support their weight. Therefore avoid installaon
on unstable elements such as: furniture, chairs and vibrant surfaces as stages or other speakers without appropriate fix point specifically designed
to avoid speaker movement. Then avoid the use of inadequate supports, we suggest to use CELECTRON stands and accessories only.
• In case of the speakers are provided of rigging points: DO NOT SUSPEND THE SPEAKERS FROM THE HANDLES, use exclusively these rigging points.
Consult professional rigger or structural engineers prior to suspending loudspeakers from a structure not intended for that use. Always know
the working load limit of the structure supporng the loudspeakers. Always make sure that the rigging hardware minimum rang is at least five
mes the actual load, speakers and rigging hardware.
• In case of suspended installaons of acve loudspeakers where is not possible to turn on and off the speakers from their appropriate
switches, we recommend to install switches on the mains lines, for this purpose consult an expert electrician for the exact dimension of wiring.
• Locate the speakers as far away as possible from radio or television receivers or other sensive equipment. These speakers have a strong
magnec field which can induce hum and noise into unshielded devices that are located nearby with consequent deterioraon of recepon of
image and sound.
• Celectron Electronic reserves the right to change these specificaons at any me without noce.
• Celectron Electronic declines any liability for damages to objects or persons caused by lacks of maintenance, improper use, installa on not
performed with safety precau ons and at the state of the art.
POWER SUPPLY AND MAINTENANCE
• Clean only with dry cloth.
• Check periodically that the slots for its proper ven la on and hea
ng dissipa on are not obstructed by dust, remove the dust using a dry brush
or a compressed air gun.
• The amplifi ed loudspeakers of Celectron have been designed with CLASS I construcon and must be connected always to a mains socket outlet
with a protecve earth connecon (the third grounding prong).
• Before connec ng the product to the mains outlet make certain that the mains line voltage matches that shown on the rear of the product, a
tolerance of up to ±10% is acceptable.
• Inside the amplifi ed loudspeakers are present special safety devices such as:
9 Transformer and amplifi er over-hea ng protec on.
9 Protec on against excessive power applied at each speaker.
• THE REPLACEMENT OF FUSES INSIDE THE APPARATUS MUST BE MADE ONLY BY QUALIFIED PERSONNEL.
• CHECK THE CONDITION OF THE PROTECTION FUSE, ACCESSIBLE OUTWARD, ONLY WITH THE APPARATUS SWITCHED OFF AND DISCONNECTED
FROM THE MAINS LINE OUTLET.
• REPLACE THE PROTECTION FUSE ONLY WITH SAME TYPE AS SHOWN ON THE PRODUCT.
• IF AFTER THE SUBSTITUTION, THE FUSE INTERRUPTS AGAIN THE APPARATUS WORKING, DO NOT TRY AGAIN THEN CONTACT THE
CELECTRON SERVICE CENTRE.
12
GENERAL INFORMATION
Thank you for having chosen a CELECTRON product.
The LT Series by CELECTRON is an extended range of acve and passive speaker systems with plywood cabinet offering
the renowned CELECTRON sound and a high-level performance in a reliable and affordable package. For the
construc
on of the cabinets we have used plywood, a very lightweight and durable material that makes moving and
installing these speakers very quick and easy. Strong, an -scratch paint and steel grilles with an internal foam layer
provide proper protecon for years of service. The dual-angle pole holder featured in LT8, LT10, LT12 and LT15 models
offers the possibility to obtain a more uniform coverage of the audience.
For the high frequency reproducon of LT Series we have designed wide-dispersion horns, able to provide constant
coverage for large audiences and detailed response with low distoron. The high-excursion woofers, together with
carefully tuned vented cabinets, offers an extended response with deep and ght basses.
The LT Series includes 6 acve models ranging from 6.5” to dual 15” woofers, plus 1 satellites + subwoofer system. The
extremely lightweight power modules used in the ac ve models feature the latest technologies for amplifi ca on, such
as Switch Mode Power Supply and CLASS D output stages, which provides a massive amount of power with a reduced
weight. The power modules are hosted in fully-sealed die-cast aluminium boxes that provides protec on, perfect
insula on of the cabinet from the outside and extremely e ffi cient cooling. Each module includes a sophis cated pre-amp
sec on with up to 24 dB/oct. phase aligned crossover fi lters and ac ve EQ fi lters for the system’s fi ne tuning. The DUAL
LIMITER circuit ensures an undistorted sound even at the loudest level and a total loudspeaker protec on.
The LT loudspeaker systems can be combined with the SW subwoofers: available in 5 models and capable of providing
the perfect low frequency extension for each model of the series.
INSTRUCTIONS (FIG. 1 / 2 / 3 / 4 / 5)
1. INPUT (combo XLR-JACK input)
This is a female combo connector, which accepts a XLR or a JACK plug from almost any type of equipment with a
balanced or unbalanced outputs. The XLR input is wired as follows:
Pin 1 = shield or ground
Pin 2 = + posi ve or "hot"
Pin 3 = - nega ve or "cold"
The JACK input is wired as follows:
Tip = + posi ve or "hot"
Ring = - nega ve or "cold"
Sleeve = shield or ground
When connec ng an unbalanced signal (RCA pin jack inputs on LT6A model), wire them as follows:
Pin2 / Tip = + posi ve or "hot"
Pin 1-3 / Sleeve = shield or ground
NOTE: whenever possible, use always balanced cables. Unbalanced lines may also be used but may result in noise over
long cable runs. In any case, avoid using a balanced cable for one channel and an unbalanced one for the other.
2. LINK (XLR output)
This is a male XLR connector, it is connected in parallel with the respec ve INPUT socket, so the LINK is wired as INPUT.
Connect these to the inputs of other powered speakers to make an array.
3. MIC / LINE switch
This switch adjusts the gain of the LINE/MIC input varying the sensi vity between MIC, suited to connect a microphone,
and LINE, suited to connect a device with high level output like a MIXER, a CD player etc.
NOTE: do not use the MIC sensi vity to "pump up" the volume with the LINE level equipment, in order to avoid the analog
input satura on that could produce very annoying distor on.
4. GND LIFT switch
This switch li the ground of the balanced audio inputs from the earth-ground of the amplifi er. If you have HUM noise
problem on one or more loudspeaker try to change the posi on of these switches (o en all up or all down for all the
amplifi ers in the system). Please note that to have an eff ect all cables must be balanced.
5. LEVEL control
Rotary level control: it a enuates the level of the signal sent to the INPUT. The a enua on ranges from “0” fully closed
(the signal is completely a enuated) to “10” fully open, nominal level (the signal is not a enuated in any way, so it is
fed to the internal amplifi er at the same level at which it arrives on input).
13
6. LOW control
This control gives you up to 6 dB boost or cut at 90 Hz with a "SHELVING" curve shape. Use it to add or reduce the
sound "punch", or to reduce the low frequency rise when the speaker is set near walls or on fl oor as stage monitor (not
available on LT6A model).
7. HIGH control
This control gives you up to 6 dB boost or cut at 8 KHz with a "SHELVING" curve shape. Use it to add or reduce the sound
"clarity" and "brightness" (not available on LT6A model).
8. SIGN/LIMIT indicator
GREEN LED illuminates to indicate the presence of the signal at the amplifi er input.
RED LED illuminates when the internal amplifi er's output is limited. When this LED fl ashes reduce the input signal
level.
9. ON indicator
GREEN LED: when lighted indicates amplifi er has been turned on and AC power is available.
10. POWER switch
Speaker is "ON" when the switch is in the "I" posi on, use this switch to set the speaker power to ON or OFF.
NOTE: When you shut down your equipment, turn off the speaker fi rst. When powering up, turn on the speaker last.
11. LINE VOLTAGE selector
This switch sets the AC voltage line of your country (usually it is set by factory and isn't necessary to change it). The 115V
se ng is for mains line in the range of 105-120V~ and 230V se ng is for mains line in the range of 210-240V~.
WARNING: AN INCORRECT SETTING OF AC LINE VOLTAGE COULD DAMAGE SERIOUSLY THE INTERNAL
ELECTRONICS!
12. FUSE holder
Here is placed the mains protec on fuse.
WARNING: REPLACE THE PROTECTION FUSE ONLY WITH SAME TYPE AS SHOWN ON THE PRODUCT.
IF AFTER THE SUBSTITUTION, THE FUSE INTERRUPTS AGAIN THE APPARATUS WORKING, DO NOT TRY
AGAIN THEN CONTACT THE CELECTRON SERVICE CENTER.
13. AC~ socket
Here’s where you plug in your speaker’s mains supply cord. You should always use the mains cord supplied with the
speaker. Be sure your speaker is turned off before you plug the mains supply cord into an electrical outlet.
Celectron Electronic Group
BBFY Industrial USA Inc
City of Industry - California
www.
celectronaudio.com
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