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Owner manual LK 705-GB.cdr

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Owner manual LK 705-GB.cdr Powered By Docstoc
					Troubleshooting

Before removing your amplifier, refer to the list below and follow the suggested
procedures. Always test the speakers and their wires first.

No Output       Confirm that all terminal strip connections are secure and tight.
                Check both in-line and built-in fuses. Both the "+12V" and the "REMOTE" terminals must
                have +12V referenced to chassis ground.
               Confirm that the audio signal source (car radio, equalizer, etc.) is connected and is supplying
               output signal. To check if the amplifier is supplying signal, unplug the RCA cables from the
               signal source (but leave them plugged into the amp). Gently tap the center pin of each of
               the disconnected RCA plugs with your finger. This should produce a noise (feedback) in
               your speakers.

Only one       Confirm that all speaker strip connections are secure and tight.
channel        Check the "BALANCE" control on the head unit (or other source) to verify that it is set to
works          its midpoint.

               If you are using the Low Level RCA Inputs, reverse the input plugs at the amplifier
               (switches the R with the L). If the channel which is silent switches to other side,
               the problem is either in the head unit/other source or the connecting cables.


Weak Output    Readjust the Input Sensitivity Control to better suit the input signal.

Noise in the   If the noise is a "whine" whose pitch follows the engine speed, confirm that the
Audio          amplifier and any other signal sources ( head unit, etc.) are properly grounded.

               If the noise is a "clicking" or "popping" noise whose rate follows the engine speed, this
               usually means that the vehicle is equipped with resistor spark plugs and wires, or that
               the ignition is in need of service.

               Check the routing of the speaker and input wires to make sure they are not adjacent to
               wires which interconnect lights and other accessories.
                                                                                                                 LK 705




                                                  -12-
FEATURES                                                                              SPECIFICATIONS


                                                                                      MODEL LK 705                                    Total                Ch 1-2            Ch 3-4             SUB Ch
 Five Channel Amplifier LK 705
                                                                                      Max Power                                       1.500 W               350 W              350 W              800 W
    Five Channel Bridgeable MOSFET Amplifier
                                                                                      Power RMS @ 4 Ohms                               420 W               60 W x 2           60 W x 2          200 W x 1
    Heavy Duty Aluminum Alloy Heatsink
    Class A-B Operation                                                               Power RMS @ 2 Ohms                               620 W               80 W x 2           80 W x 2          300 W x 1
    SUB Ch: Continuously Variable Low Pass Crossover                                  Bridged Power (4 Ohms)                                               160 W x 1         160 W x 1
    (35Hz to 155Hz)                                                                   S/N Ratio                                         > 93
    18dB Bass Boost
    Phase Shift                                                                       Low Pass Crossover (Variable)                                                       300 - 6.000 Hz      30 - 155 Hz
    Remote Subwoofer Level Control                                                    High Pass Crossover                                              80 - 6.000 Hz       80 - 1.500 Hz
    Ch 1-2 High Pass Crossover (80 - 6.000 Hz)                                        Bass Boost (50 Hz)                                                                                        0 - 18 dB
    Ch 3-4 High Pass Crossover (80 - 1.500 Hz)
    Ch 3-4 Low Pass Crossover (300 - 6.000 Hz)                                        Tri-mode Operation                                 Yes
    Continuously Variable Input Gain Control                                          Remote Subwoofer Level Control                     Yes                                                       Yes
    Nickel Plated RCA And Speaker Level Inputs                                        Frequency Response                           9 Hz - 50 KHz
    Remote Turn On / Turn Off Circuit
                                                                                      THD@ RMS Output                                 0.01 %
    MOSFET Pulse Width Modulated Power Supply
    2 Ohm Stable Stereo Operation With Output Power Increase                          Channnel Separation                               90 dB
    Soft Turn-on Circuit                                                              Damping Factor                                    100
    Thermal and Speaker Short Protection Circuitry
    LED Power And Protection Indicators                                               Fuse Values                                      35A x 2
    Dimensions: 240x50x550 mm                                                         Dimensions mm. (240 L x 50A x ...P)                550




The IMPACT LK series amplifiers have been designed with 100% MOSFET power supplies,
ensuring extremely quick switching response for plenty of clean power.




                                                                                      Protection Circuitry
                                                                                      The amplifier protect ion circui try will disabl e the amplifier if the inpu ts are overl oade d, short -circui ted or
                                                                                      extr emely high temperat ure cond itions are detect ed. When the protect ion mode is in operat ion, the LED indi cat or
                                                                                      on the front panel will be illuminated, indi cat ing the amplifier has gone into a sel f-pr eservat ion mode.

                                                                                      If you obs erve that the protection LED is lit, please check the system carefully to det ermine what has caused the
                                                                                      protection circuit to eng age. The ampl ifier can be reset by turning the remote pow er off and then on again. If the
                                                                                      ampl ifier shut s dow n due to a ther mal ove rload con dition, please allow it to cool dow n bef ore pow ering up. If the
                                                                                      ampl ifier shut s dow n bec ause of an input ove rload or shor t circuit, be sure to repa ire thes e con ditions bef ore
                                                                                      attempting to power up the amplifier again.




                                         -2-                                                                                                         -3-
2 Ohm Operation (in stereo mode)
                                                                                                                       5 Channel Amplifier LK 705 - Input wiring
The IMPACT LK Series amplifier was designed to operate effectively at loads down to 2 Ohms.
This means that you can install four 8 Ohm speakers per channel when using parallel wiring.
Increasing the number of woofers per channel at low frequencies (up to 100Hz) produces an
 acoustic coupling effect. This acoustic coupling increases your power output by 3 dB per speaker.                                         HEAD UNIT with Front/Rear/Sub OUTPUT

When operating at 2 Ohms, the amplifier will increase their output power by approximately 50%. The
current draw will also increase by about the same amount, so be sure you have enough current to run the
amplifiers into a 2 Ohm load. If you lack adequate current, your music reproduction will be distorted.

Please note: The gain control of any car audio amplifier should not be mistaken for a volume control. It is
a sophisticated device, designed to match the output level of your audio source unit to the input level of
the amplifier. Do not adjust this input level to maximum unless your input level requires it. Ignoring these
instructions will result in an input overload to the amplifier, and excessive audio distortion. It can also cause
the protection circuit to engage.

Electrical Wiring
All IMPACT LK series power amplifiers are equipped with easy top access screw terminals. These
terminals are n ickel-plated in order to ensure excellent electrical contact and to resist corrosion.
When making electrical connections to the amplifier, please observe the following:
 Use at least 8 gauge or heavier wire for power and ground connections.                                                          FRONT                   SUB                           REAR
 Wire the amplifier directly to the car battery. Make sure there is circuit protection (such as a fuse) on the                   INPUTS                INPUTS                         INPUTS
 positive power lead, within 18 inches of the battery.
 For the ground connection, use the shortest possible wire to a good chassis ground point.
                                                                                                                          If your HEAD UNIT have less than 3 RCA output, you can match the requested
 Wire the Remote connection to the remote turn-on lead of your equalizer or head unit. In some cases
                                                                                                                          INPUT plugs by using some “Y adapter ”
 this may be the power antenna lead of the head unit.

Fuses
Fus es protect both the ampl ifier and the electrical system of your vehicle from faulty conditions. If you mus t
replace the fuse in your ampl iifier, use a fuse of exactly the same type and rating. A different type or rating may
result in damage or cause a fire.


Mounting the Amplifier
Mark the location for the mounting screw holes by positioning the amplifier where you wish to install it and
use a scribe (or one of the mounting screws) inserted in each mounting hole to mark the mounting surface.
If the mounting surface is carpeted, measure the hole centers and mark with a felt tip pen.
Drill pilot holes in the mounting surface for the mounting screws and insert the mounting screws into these
holes. Tighten them securely.
Note: Before beginning your installation, be sure to take note of any wires, lines or other devices in your
vehicle which may be located behind any mounting surface.




                                                      -4-                                                                                                    -5-
5 Channel Amplifiers LK 705                                                                                                                                  Tri-mode speaker wiring

                                                                                                                    Tri-Mode Speaker Wiring Two Channel Amplifier
                                          Speaker wiring
                                                                                                                    Tri-Mode Operation is a unique feature which allows a two channel amplifier to drive a sub-woofer operated
                                                                                                                    in MONO mode, while simultaneously driving full range speakers in STEREO.

                                   CH 1
                                          Bridged
                                                    CH 2             Fuses      Batt    Rem    Gnd                  To engage the amplifier in this mode, place the Crossover (Subwoofer)                              Component Values
                                                                                                                    switch in the FULL position. Use a 100V non-polar capacitor for a high                             for 6dB Passive Crossover
                                                                                                                    pass crossover and a wire coil inductor to block high frequencies from                             Frequency   Inductor   Capacitor
                  Sub
                                                                                                                    the subwofer, as shown in the figure below. Pls review the table below
                                                                                                                                                                                                                       80Hz         7.5mH       470uF
                                                                                       Power                        for inductor and capacitor component value, to determine the desired
                                                                                                                    crossover frequencies                                                                              100Hz        6.5mH       330uF
                                   CH 3             CH 4
                                                                                                                                                                                                                       120Hz        5.5mH       330uF
                                                                                                                                                                                                                       150Hz        4mH         220uF
        +                                                                                            GROUND

                                                                                                To REMOTE TURN-ON
   Sub woofer Speaker                                                                           from HEAD UNIT
                                                                                                To BATTERY



                                                                                                                                                                                             Connect the NEGATIVE SPEAKER TERMINAL to the
                          Ch1     Ch2                        Ch3     Ch4                                                                                                                     RIGHT CHANNEL NEGATIVE AMPLIFIER TERMINAL.
                        SPEAKER SPEAKER                    SPEAKER SPEAKER
                                                                                                                                                                                             Connect the POSITIVE SPEAKER TERMINAL to the
                                                                                                                                                              +                              LEFT CHANNEL POSITIVE AMPLIFIER TERMINAL.
                                                                                                                                         LOW PASS
                                                                                                                                FILTER (INDUCTOR)
                                                                                                                                                                                              SUBWOO FER MINIMUM
                                  Bridged speaker wiring                                                                                                                                      IMPEDAN CE 8 OHMS!


                                          Bridged
                                   CH 1             CH 2             Fuses      Batt    Rem    Gnd
                                                                                                                                                                     Bridged
                                                                                                                                                              CH 1             CH 2          Fuses      Batt    Rem    Gnd




                  Sub
                                                                                       Power                                                  Sub
                                                                                                                                                                                                               Power
                                   CH 3             CH 4
                                                                                                                                                              CH 3             CH 4



        +                                                                                            GROUND                        +                                                                                               GROUND
                                                                                                To REMOTE TURN-ON
                                                                                                                                                                                                                         To REMOTE TURN-ON
   Sub woofer Speaker                                                                           from HEAD UNIT
                                                                                                                             Sub woofer Speaker                                                                          from HEAD UNIT
                                                                                                To BATTERY
                                                                                                                                                                                                                         To BATTERY
                                                                             SPEAKER
                                                                             IMPEDAN CE
                         Ch1-2                              Ch3-4            4 - 8 OHMS!
                        SPEAKER                            SPEAKER                                                                                    Ch1     Ch2                       Ch3     Ch4
                                                                                                                                                    SPEAKER SPEAKER                   SPEAKER SPEAKER
     Connect the NEGATIVE SPEAKER TERMINAL to the
     RIGHT CHANNEL NEGATIVE AMPLIFIER TERMINAL.                                                                                                                SPEAKER
     Connect the POSITIVE SPEAKER TERMINAL to the                                                                                                              IMPEDAN CE
     LEFT CHANNEL POSITIVE AMPLIFIER TERMINAL.                                                                                                                 4 - 8 OHMS!



                                                            -6-                                                                                                                            -7-
X-over setting                                                                                                    System 2: Subwoofer + 2 Way Active Front System
The IMPACT LK 705 is specially designed for maximum adjusting flexibility.                              Sub Channel: Subwoofer: Low Pass 100 Hz
                                                                                                        Channel 1-2: Tweeter: High Pass = 6.000 Hz
Depending to X-over regulation of the different channels, you can tune the final result exaclty to      Channel 3-4: Mid Bass: Low Pass = 6.000 Hz - High Pass = 80 Hz
your request.

SUB Channel can be adjusted as follows:
X-over: Full or Low Pass (30 to 155 Hz)
Bass Boost; (0 / +18 dB at 50 Hz)
Phase shift: (0 - 180°)
Channels 1-2 can be adjusted as follows:
X-over: Full or High Pass (80 to 6.000 Hz)
Channels 3-4 can be adjusted as follows:                                                             0 Db
High Pass X-over: Full or High Pass (80 to 1.500Hz)
Low Pass X-over: Full or Low Pass (300 to 6.000Hz)
This combination of Low / High Pass must be adjusted properly to get the results you want.           -3 Db
Pls note that if Low Pass frequency point is set lower than High Pass frequency point,
the output of the Channel 3-4 will be void.
                                                                                                     -6 Db

5 Channel Amplifier LK 705 - X-Over Setting
                                                                                                     -9 Db

                                                                                                             20            100                     1 KHz                  10 KHz
                                                                                                               Sub Ch                    Ch 3-4                          Ch 1-2

                  System 1: Subwoofer + Front System + Rear System
Sub Channel: Subwoofer: Low Pass 100 Hz                                                                      System 3: Subwoofer + Kick Bass + 2 Way Passive Front System
Channel 1-2: 2 way system with passive x-over: High Pass = 80 Hz
Channel 3-4: 2 way system with passive x-over: Low Pass = Full - High Pass = 80 Hz                      Sub Channel: Subwoofer: Low Pass 100 Hz
                                                                                                        Channel 1-2: 2 Way Front System: High Pass = 300 Hz
                                                                                                        Channel 3-4: Kick Bass: Low Pass = 300 Hz - High Pass = 80 Hz




    0 Db
                                                                                                     0 Db

   -3 Db
                                                                                                     -3 Db

   -6 Db
                                                                                                     -6 Db

   -9 Db
                                                                                                     -9 Db
           20               100                     1 KHz                   10 KHz
                                                                                                             20            100                     1 KHz                  10 KHz
             Sub Ch               Ch 1-2-3-4                                                                   Sub Ch                    Ch 3-4                          Ch 1-2

                                             -8-                                                                                                   -9-
System 4: Subwoofer + Powerfull 2 Way Passive Front System                                Precautions
Sub Channel: Subwoofer: Low Pass 100 Hz
Channel 1-2-3-4 (Bridged): 2 way system with passive x-over                               Before you drill or cut any holes, investigate your car's layout very carefully. Take care when you work near
Channel 1-2: High Pass = 80 Hz                                                            the gas tank, fuel lines, hydraulic lines and electrical wiring.
Channel 3-4: Low Pass = Full - High Pass = 80 Hz (must be the same frequency of ch 1-2)
                                                                                          Do not operate the amplifier when it is not mounted. Attach all audio system components securely within
                                                                                          the automobile to prevent damage, especially in case of an accident.
                                                                                          Do not mount this amplifier so that the wire connections are unprotected or in a pinched condition, or likely
                                                                                          to be damaged by nearby objects.

                                                                                          Before making or breaking power connections in your system, disconnect the vehicle battery. Confirm that
                                                                                          your head unit or other equipment is turned off while connecting the input jacks and speaker terminals.

                                                                                          If you need to replace the power fuse , replace it only with a fuse identical to that supplied with the syste m. Using a fuse of
0 Db                                                                                      different typ e or rating may result in damage to your syste m which isn't covered by the manufactu rer's warranty.

-3 Db


-6 Db


-9 Db

        20              100                      1 KHz                   10 KHz

          Sub Ch              Ch 1-2-3-4


        System 5: Subwoofer + Mid Bass + Midrange & Tweeter
  Sub Channel: Subwoofer: Low Pass 100 Hz
  Channel 1-2: Midrange / Tweeter (Tw with passive x-over): High Pass = 800 Hz
  Channel 3-4: Mid Bass: Low Pass = 800 Hz - High Pass = 80 Hz




 0 Db


-3 Db


-6 Db


-9 Db

        20              100                      1 KHz                   10 KHz
          Sub Ch                       Ch 3-4                             Ch 1-2

                                          -10-                                                                                                             -11-

				
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