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        Boss Audio Systems R4002 audio amplifier
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1.                                  CH 3 4 CONTROL     CROSSOVER LOW PASS INPUT CH1 CH3 INPUT Low PASS CROSSOVER  DE MODE     Power    BOSS 2  MEKO 5           Tim     HIGH FULL FULL HIGH  PASS RANGE 35Hz 160H2 MIN  1848 35Hz 160H RANGE PASS  CH 1 2 CONTROLS O  O LEVEL  ken E  RIOT FOUR CHANNEL MOSFET CH2 Low   c4 of 1b oR  POWER AMPLIFIER        J             n                                                                    CH CH CH CH    1  1  2  2        To Speaker    ee ae  Emmm of head unit    RIOT MOSFET Amplifier User   s Manual   page 8    High Level Input Wiring    The high level input s  should only be used when your head unit lacks RCA outputs   If the RCA outputs are not present  connect the speaker outputs from the receiver  to the high level input connector of the amplifier  Be sure to observe polarity to    avoid audio phase problems     NOTE  Do not connect BOTH the high level and low level inputs from your    receiver to your amplifier at the same time                                                                                                                                                                                                                                                                                                                         MonoBlock Amplifier  a  e  gt  le j C  gt  c  gt  C  gt  c  gt         3 LOW PASS    FREQUENCY MODE LEVEL SENSITIVITY LEFT  O POWER  3    T    PROTECTION Zz  e e LOW PASS e e  E    re  SS 0  18dB 35Hz 160
2.        INPUTS IO l CONTROL D w    TWO CHANNEL MOSFET POWER AMPLIFIER  L i Y                            To Audio  i er Peer OL___   unit or signal  oooooo   processor    4 Channel Amplifiers  R2504  R3004  R4004  and R5004        Remote Subwoofer  Level Control                                     J                                                                                                                                                                                                                                                 CH 3 4 CONTROL   CROSSOVER  LOW PASS INPUT CH3 INPUT BASS LOW PASS CROSSOVER  E MODE FREQ LEVEL LEVEL BOOST FREQ MOD E     Power      f  5 Ti          rT O PROTECTION    e e e e e e e e  HIGH FULL s L p FULL HIGH    PASS RANGE 35Hz 160Hz MIN MAX  WdB 35Hz 160Hz RANGE PASS    REMOTE  SUBWOOFER  LEVEL  lo ooo 0 U    foo oae Ll CONTROL  Ss D FOUR CHANNEL MOSFET CH210 3 Lod D    POWER AMPLIFIER LEV          Wy                                                                      To FRONT Audio Outputs of  head unit or  signal processor    OOcccIcC    RIOT MOSFET Amplifier User   s Manual   page 6    To REAR Audio Outputs of  head unit or  signal processor    Power and Speaker Wiring 2 Channel Amplifiers    R2002  R3002  R4002  R6002  R8002  and R12002    Tri mode operation allows you to connect this amplifier to a pair of main speakers plus    a subwoofer on one pair of output channels  The main speakers will operate in STEREO  while the subwoofer simu
3.  150 Hz 4mH 220uF F 2 OHMS  Z CH4  Speaker  Low pass    2  filter inductor XS  Ea  aa C d C p C bi E  gt  a  gt  C  gt  N  AKER CO O POWER CONNECTIONS D    E    cH1        CH2          EH3 l  CH4       FUSES BATT  REMOTE GROUND a  3   lelele w  C  E 3088 Ly UCL Ul LT LT 3  E 9      p RIOT CE    Sy D B    D aaa FOUR CHANNEL MOSFET POWER AMPLIFIER D E       Chassis    ground  High pass filter pomt  crossover  CH2 to REMOTE TURN ON  Speaker terminal of head unit    gi Q  MINIMUM    _ a  High pass filter SPEAKER  crossover IMPEDANCE FUSE    CH1 2 OHMS      Speaker  Low pass  filter inductor  6  LEFT  MINIMUM A  SPEakeR    Subwoofer  IMPEDANCE  4 OHMS    RIOT MOSFET Amplifier User   s Manual   page 13    Power and Speaker Wiring 4 Channel Amplifiers    R2504  R3004  R4004  and R5004           CH2  Speaker SPEAKER  IMPEDANCE  2 8 OHMS    CH1  Speaker                                                                                                                                                                                                                                                       Four  Channel  Mode _  a      C 3 C   C 3     3      CH3      CH4    FUSES BATT  REMOTE GROUND a  7 K So J A  CE   C  E ___    a  E CE    j   CH 1 2 7 CH 3   OT  Ne SS D BRIDGED RIDGE FQUR CHANNEL MOSFE   POWER AMPLIFIER D ko o y       Chassis  T ground  SPEAKER CH3 point  IMPEDANCE Speaker  f   2 8 OHMS to REMOTE TURN ON  CH4 terminal of head unit  Speaker bas       CI         SPEAKER    IMPED
4. 4  mounting screws       Troubleshooting    If you experience operation or performance problems with this product  compare your  installation with the electrical wiring diagram on the previous pages  If problems persist   read the following troubleshooting tips which may help eliminate the problems     SYMPTOM POSSIBLE REMEDY    Amplifier will not Check to make sure you have a good ground connection   power up  Check that the Remote Input  Turn On  has at least 3VDC   Check that there is battery power on the     terminal   Check that there is at least 12v   Check all fuses  replace if necessary   Make sure that the Protection LED is not illuminated  If it is lit  shut off  the amplifier briefly  and then repower it   Protection LED Check for short circuits on speaker leads   comes on when Turn down the volume control on the head unit to prevent overdriving   amplifier is Remove speaker leads  and reset the amplifier  If the Protection LED still  powered up  comes on  then the amplifier is faulty and needs servicing   Check that all fuses are OK   Check that amplifier is properly grounded   Check that the Remote Input  Turn On  has at least 3VDC   Check that the RCA audio cables are plugged into the proper inputs   Check all speaker wiring     Reset the Level Control    Check the Crossover Control settings   Audio present in Check the RCA interconnect cables   only one channel    Check all speaker wiring     High hiss in the Disconnect all RCA inputs to the amplifiers  If the 
5. 4002  R6002  R8002  and R12002                                                                                                                                                                                                                                                                               LEFT  Speaker  SPEAKER  IMPEDANCE  Ch anel 2 8 OHMS  Mode        i ae R i o       A    BOSS        cem  7 1          BRIDGED RIOT P ib     f           Chassis  Ea ground  point    to REMOTE TURN ON   O of head unit                                                                                                                                                                                                                                                                     Subwoofer E  IMPEDANCE    4 8 OHMS  Bridged  Mode  a  4  i i i           BATT  REMOTE GROUND a  3 L    BOSS a     CE  E Le J T  1       BRIDGED RIOT  4  w    7 Sy      Chassis      ground  point  Connect the Positive     terminal of the  subwoofer to the L     amplifier terminal  to REMOTE TURN ON  terminal of head unit  Connect the Negative     terminal of the     subwoofer to the R     amplifier terminal  O go    RIOT MOSFET Amplifier User   s Manual   page 10    Low Level Input Wiring    Low level  RCA  input wiring is preferred for best audio performance  Always use  a high quality RCA cable for best audio performance     NOTE  Do not connect BOTH the high level and low level inputs from your  receiver to your 
6. ANCE  4 8 OHMS    Connect the Negative     terminal of the LEFT subwoofer to  the CH2     amplifier terminal           LEFT    Subwoofer Connect the Positive     terminal of the LEFT subwoofer to    the CH1     amplifier terminal                                                                                                                                                                                                                                                        Bridged  Mode             a C C   C   C p       2   3        cH3        CH4    FUSES BATT  REMOTE GROUND a  E o       oS 5 E  Ce    SUSS   gt    SSS  E        a  2  Kacy D a Sm FQUR CHANNEL MOSFE9 POWER AMPLIFIER D iwo  Chassis    ground  point  RIGHT    Subwoofer a to REMOTE TURN ON    terminal of head unit    Connect the Negative        terminal of the RIGHT  SPEAKER Q      IMPEDANCE subwoofer to the CH4      4 8 OHMS amplifier terminal  FUSE  Connect the Positive      terminal of the RIGHT    subwoofer to the CH3      amplifier terminal     RIOT MOSFET Amplifier User   s Manual   page 12    Connecting the amplifier    Before doing any wiring  look through  this manual and identify the diagrams  to follow for power  input and speaker  connections for your particular  installation  Be sure you understand  all the connections before you proceed     1  Connect the power ground terminal  to the closest point on the chassis of  the car  Keep this ground wire to less  than 39   100 cm  in length  Use 8  gauge  o
7. Hz FULLRANGE MIN MAX 2 8V 100mV 2V L R           7 svev ia  OFER BASS BOOST CROSSOVER INPUT CONTROLS T  LE  EL  t  J MOSFET MONOBLOCK POWER AMPLIFIER RIGT en                                                             MonoBlock Amplifiers  R1600M and R2000M                       To Speaker Terminals  of head unit                                                                                                                                                                      _        a       C 3  c   c   c   c c         3 LEVEL LOW T  BASS CROSSOVER  H a LEVEL BOOST FREQUENCY    Power  E 3 OSS LEET       PROTECTION a  life        3    bH o O  MIN MAX O  12dB 40Hz 130Hz m ea  3 RIGHT SUBWOFER T  HIBHELPYEL CONBROL    MOSFET MONOBLOCK POWER AMPLIFIER              L  L  R  R     m f on G o G o f n   a      To Speaker Terminals  of head unit                   Remote Subwoofer  Level Control    RIOT MOSFET Amplifier User   s Manual   page 9    
8. Specifications    MODEL  RMS POWER  into 4 Ohms    MAX POWER  into 2 Ohms    BRIDGED POWER    into 4 Ohms    Min  speaker  impedance    THD    Frequency response  Signal to noise ratio  Channel separation  Damping factor  Crossover range    low pass   high pass  Bass boost  Fuse rating  Dimensions     MODEL  RMS POWER  into 4 Ohms    MAX POWER  into 2 Ohms    BRIDGED POWER    into 4 Ohms    Min  speaker  impedance    THD    Frequency response  Signal to noise ratio  Channel separation  Damping factor  Crossover range    low pass   high pass  Bass boost  Fuse rating  Dimensions     2 Channel MOSFET Amplifiers    R2002  90W x 2    200W x 2    400W x 1    R3002  125W x 2    300W x 2    600W x 1    2 Ohm Stereo  4 Ohm Mono Bridged    0 01   QHz 50kHz   gt  102dB  90dB  125     35Hz 160Hz  fixed  80 Hz    Variable 0    18dB    30A  6 85 x10 43 x2 25     4 Channel    35A    9 21 x10 43 x2 25     MOSFET Amplifiers    R2504  90W x 4    250W x 4    SOOW x 2    R3004  110W x 4    300W x 4    600W x 2    2 Ohm Stereo  4 Ohm Mono Bridged    0 01   9Hz 50kHz   gt  102dB  90dB  125     35Hz 160Hz  fixed  80 Hz    Variable 0    18dB    25A x 2    11 57 x10 43 x2 25     30Ax 2    12 36 x10 43 x2 25     RIOT MOSFET Amplifier User   s Manual   page 16    R4002 R6002  150Wx2 200Wx2  400Wx2 600W x2  800W x1   1200W x 1  40A 25Ax2  10 79 x10 43 x2 25  12 36 x10 43 x2 25   R4004 R5004  150Wx4 200Wx4  400W x4 500Wx4  800W x2 1000Wx2  35Ax2 35Ax3  15 51 x10 43 x2 25   21 81 x10 43 x2 25     All spec
9. amplifier at the same time     MonoBlock Amplifier  R1100M    Remote Subwoofer  Level Control                                  C D  C D     D     2    LOW PASS    FREQUENCY MODE LEVEL SENSITIVITY LEFT    3     e e LOW PASS e e  E Q g 0  18dB 35Hz 160Hz FULLRANGE MIN MAX 2 8V 100mV 2V  wW Ey             J                                        Power                                                                                                                   PROTECTION                                                                   00              REMOTE  SUBWOOFER BASS BOOST CROSSOVER INPUT CONTROLS                      ae    LEVEL R    OT                                                                                                                                                                                                                                                                               D pallens MOSFET MONOBLOCK POWER AMPLIFIER E D  L   INPUTS J  To Audio Outputs of head  unit or     ee OL  oOooooe  MonoBlock Amplifiers  R1600M and R2000M  Remote Subwoofer  Level Control  Fs C k E pi C  gt  2    2       3 LEVEL Low a  eer Fife   sooSr PREQUENCY    Power  3 LERT    PROTECTION A  3035 LIR an  E o ooo ace ee eee a  E HIGH LEVEL e So tEVEL 2  wo y D INPUTS IOT CONTROL o  MOSFET MONOBLOCK POWER AMPLIFIER m  ja   i  To Audio Outputs of head  unit or    signal processor    RIOT MOSFET Amplifier User   s Manual   page 7    High Level Input Wiring    The high l
10. and attach  the amplifier to the mounting surface  securely using screws     SHOCK HAZARD  Do not open the case  of this product  There are dangerous    voltages present within the unit  There are  no user serviceable parts within the unit        Power and Speaker Wiring    4 Channel Amplifiers  R2504  R3004  R4004  and R5004    Tri mode operation allows you to connect this amplifier to a pair of main speakers  plus a subwoofer on one pair of output channels  The main speakers will operate  in STEREO while the subwoofer simultaneously operates in MONO     To set up the amplifier to run in this mode  put the crossover switches in the FULL  position  Insert high pass filter capacitors and a low pass filter inductor into the  wiring as shown below  Be sure to check the table at the bottom of this page to  determine the correct capacitor and inductor values for the crossover frequency    you wish to achieve     Tri Mode    MINIMUM  SPEAKER  IMPEDANCE    4 OHMS RIGHT  Subwoofer                                                                                                                                                                                                                                                                                                     Component values for a ie  6dB Passive Crossover scl Sawa filter a  FREQUENCY INDUCTOR CAPACITOR i Speaker  80 Hz 7 5mH 470uF  MINIMUM  100 Hz 6 5mH 330uF High pass filter SPEAKER  120 Hz 5 5mH 330uF crossover IMPEDANCE 
11. drill or cut any holes   investigate your car s layout very  carefully  Take special care when you  work near the gas tank  fuel lines   hydraulic lines and electrical wiring     Never operate the amplifier when it is  unmounted  Attach all audio system  components securely to prevent  damage  especially in an accident     RIOT MOSFET Amplifier User   s Manual   page 4    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 amplifier  Using  a fuse of a different type or rating may  result in damage to your audio system  or your amplifier which is not covered  by the manufacturer s warranty     Mounting the amplifier    1  Find a suitable location in the vehicle  in which to mount the amplifier     2  Make sure there is sufficient air  circulation around the intended  mounting location     3  Mark the location for the mounting  hole screws by positioning the amplifier  where you wish to install it  Use a  scribe or mounting screw  inserted  through each of the amp s mounting  holes  to mark the mounting surface   If the mounting surface is carpeted   measure the hole centers and mark  with a felt tip pen     4  Drill pilot holes in the mounting  surface for the mounting screws  Place  the amplifier in position  
12. evel input s  should only be used when your head unit lacks RCA outputs   If the RCA outputs are not present  connect the speaker outputs from the receiver  to the high level input connector of the amplifier  Be sure to observe polarity to    avoid audio phase problems     NOTE  Do not connect BOTH the high level and low level inputs from your    receiver to your amplifier at the same time     2 Channel Amplifiers  R2002  R3002  R4002  R6002  R8002  and R12002    Remote    Subwoofer Level Control                                     1        D         C                                                                                                                                                              J                                       HIGH   EVEL LOW LEVEL Le OVER a  INPUT BASS O Power  Ue GE A a LEVEL BOOST  3 z    PROTECTION    O       headh    T     LOW PASS   HIGH PASS  e e e e 1  MIN MAX 0  18dB ses REMOTE FULL RANGE     R Low PASS SUBWOOFER MODE  FREQ  LEVEL  Wy    INPUTS RIO T CONTROL ey   TWO CHANNEL MOSFET POWER AMPLIFIER  ie    ni                               L  L  R  R     To Speaker Terminals  of head unit    Remote    Subwoofer Level Control    4 Channel Amplifiers  R2504  R3004  R4004  and R5004 D                               ra    C D  C D  C D     C A D  C D                                                                                                                                                                                                 
13. hiss disappears  then   speakers  plug in the component driving the amplifier and unplug its inputs  If the  hiss disappears at this point  go on until the faulty noisy component is  found   It is best to set the amplifier s input level control as low as possible  The  best subjective signal to noise ratio is achieved in this manner  Try to set  the head unit as high as possible  without distortion  and the amp input  level as low as possible     Squealing noise Check for improperly grounded RCA interconnects   from speakers     Distorted sound  Check that the Input Level Control is set to match the signal level of the  head unit  Always try to set the Input Level as low as possible     Check that all crossover frequencies are properly set   Check for short circuits on the speaker leads     Amplifier gets Check that the minimum speaker impedance for the amp model is correct     very hot  Check that there is good air circulation around the amp  In some  applications  it may be necessary to add external cooling fan s      This is usually caused by poor quality RCA cables which can pick up  radiated noise  Use only the best quality cables  and route them away  from power cables     Engine noise   static type     Engine noise Check that speaker leads are not shorted to the vehicle chassis    alternator Check that the RCA grounds are not shorted to the vehicle chassis   whine  Check that the head unit is properly grounded     RIOT MOSFET Amplifier User   s Manual   page 15    Powe
14. ifications subject to change without notice     R8002  275W x 2    800W x 2    1600W x 1    30Ax 2  14 33 x10 43 x2 25     MonoBlock    MOSFET  Amplifiers    R1100M    250W x 1    1100W x 1    n a    n a    n a    30A    9 21 x10 43 x2 25     30S    AUDIO SYSTEMS    R12002  350W x 2    1200W x 2    2400W x 1    40Ax 2  18 27  x10 43 x2 25     R1600M R2000M    350W x 1 500W x 1   1600W x 1 2000W x 1  n a n a   QHz 130HzZ 9Hz 130Hz  n a n a    40Hz 130Hz 40Hz 130Hz    n a n a  0  12dB 0O  12dB  25AX 2 30Ax 2    12 36 x10 43 x2 25      15 51 x10 43 x2 25     30S       AUDIO SYSTEMS   R2002 Two Channel    R3002 Amplifiers 9  R4002   R6002   R8002   R12002   R2504 Four Channel  R3004 Ampir  Y   R4004   R5004   R1 1 ooM MonoBlock    R1 600M ERTA Car Audio  R2000M    Congratulations on your  purchase of a 3055    AUDIO SYSTEMS    RIOT Amplifier     It has been designed  engineered  and manufactured to bring you  the highest level of performance  and quality  and will afford you  years of listening pleasure     Thank you for making BUSS    AUDIO SYSTEMS    your choice for car audio  entertainment     page       0 O O A Ah Bh WO OW    12    13    14  15  16    USER   S MANUAL    CONTENTS       Introduction   What is included   Features   About 2 Ohm operation  General precautions  Installation precautions  Mounting the amplifier  Connecting the amplifier  Low level input wiring  High level input wiring    2CH Power and Speaker wiring  2CH and Bridged Modes    2CH Power and Speaker wir
15. ing  TriMode    4CH Power and Speaker wiring  4CH and Bridged Modes    4CH Power and Speaker wiring  TriMode    MonoBlock Power and Speaker wiring  Troubleshooting    Specifications    RIOT MOSFET Amplifier User   s Manual   page 1    Introduction    With the BYSS RIOT MOSFET  amplifier series  we are introducing  thirdteen new amplifiers  all designed  in the USA  This new series includes    three monoblock amps  six 2 channel     four 4 channel amplifiers     All RIOT models feature   variable low pass and high pass  crossovers and variable input gain  controls  They also incorporate an input  voltage sensistivity selector for added  system flexibility     For further flexibility in the use of a  subwoofer  0  18dB Bass Boost  control has been included on all  amplifiers  You can control the  subwoofer level with the remote level  control module     3099 understands that amplifiers are  placed in many different kinds of  installations  So we incorporated a very  flexible system of controls in these  amplifiers in order to help you integrate  the amp into your system regardless  of the nature of your input source     RIOT MOSFET Amplifier User   s Manual   page 2    What is included     When first unpacking your new  amplifier  please check first that the  package contains all of the items  below  If something is missing  contact  the store where you purchased the  amplifier     e RIOT Amplifier  e Remote subwoofer level control  e High input cable with connector    e Four  
16. level of  distortion     11  Further fine tuning of the various  controls may be necessary to obtain best  results     Don t misuse the  level control     Do not mistake the input level control  for a volume control  It is designed  ONLY to match the output level of  your audio source to the input level  of your 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     RIOT MOSFET Amplifier User   s Manual   page 5    Low Level Input Wiring    Low level  RCA  input wiring is preferred for best audio performance  Always use  a high quality RCA cable for best audio performance     NOTE  Do not connect BOTH the high level and low level inputs from your  receiver to your amplifier at the same time     2 Channel Amplifiers Remote Subwoofer    Level Control  R2002  R3002  R4002  a  R6002  R8002  and R12002                      J   J       K C  gt   c                   HIGH LEVEL LOW LEVEL                                                                                                                                                                                               E ui E  lesama BOOST woo 1 gas i    Power      9    nae    PROTECTION         5 40 155          D IAr LOW PASS   HIGH PASS      35 160  o Side REMOTE FULL RANGE  LOWPASS SUBWOOFER MODE  FREQ Hz LEV  o    
17. ltaneously operates in MONO     To set up the amplifier to run in this mode  put the crossover switches in the FULL position   Insert high pass filter capacitors and a low pass filter inductor into the wiring as shown  below  Be sure to check the table at the bottom of this page to determine the correct  Capacitor and inductor values for the crossover frequency you wish to achieve     Component values for  6dB Passive Crossover    FREQUENCY INDUCTOR CAPACITOR    80 Hz 7 5MH 470uF  100 Hz 6 5mMH 330uF  120 Hz 5 5mH 330uF  150 Hz 4mH 220uF       Tri Mode                                     in C D  C 2 C  gt  C 3 C b  k D C D                             J                                                                                                                                                                                                             aN  SPEAKER CONNECTIONS   POWER CONNECTIONS   CONNECTIONS  3       L       R    FUSES BATT  REMOTE GROUND    Zz  3   Sls C   PAAS fo ar Se   ao o    if D   CE    koy  4   BRIDGED RIOT 4  KJ   TWO CHANNEL MOSFET POWER AMPLIFIER  ro   f  Chassis  T ground  point  Medie di to REMOTE TURN ON  LEFT terminal of head unit  Speaker rai       Ee CI CI  SPEAKER High pass filter Battery  IMPEDANCE crossover  2 OHMS       RIGHT      Speaker MINIMUM  SPEAKER  Low pass  filter inductor IMPEDANCE    4 OHMS    S  subwooter L A    RIOT MOSFET Amplifier User   s Manual   page 11    Power and Speaker Wiring 2 Channel Amplifiers    R2002  R3002  R
18. oustic coupling  effect  This acoustic coupling effect  increases the output by about 3dB  for each doubling of the number   of woofers     When operating at 2 Ohms  the  amplifiers 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     RIOT MOSFET Amplifier User   s Manual   page 3    General precautions    Before installing and using your  new 30S amplifier  please be     come familiar with all the infor   mation contained in this manual     Please keep this manual in a safe  place for future reference     e Do not open or attempt to repair  this unit yourself  Dangerous high  voltages are present which may result  in electric shock  Refer any repairs to  a qualified service technician     e To avoid risk of electronic shock or  damage to the amplifier  do not permit  any of this equipment to become  damp or wet from water or drinks  If  this does occur  immediately unplug  the power wires and send the amplifier  to your local dealer or service center  as soon as possible     e  f there is smoke or any peculiar  odor present during use or if there is  damage to any of the component  enclosures  immediately unplug the  power wire and send the amplifier to  your local dealer or service center as  soon as possible      Installation precautions    Before you 
19. r and Speaker Wiring Monoblock Amplifiers    R1100M  R1600M  and R2000M                 Speaker    SPEAKER  IMPEDANCE  MonoBlock 2 8 OHMS  Mode                                                                                                                                              3   E o     BOSS  LS                                                                             Chassis    ground  point    to REMOTE TURN ON  terminal of head unit    Q    O O    RIOT MOSFET Amplifier User   s Manual   page 14    Features    Your new RIOT amplifier  features the following     e Class A B operation    e Bridgeable outputs   except R1100M  1600M and R2000M     e Tri Mode capable   except R1100M  1600M and R2000M     e MOSFET PWM  Pulse Width  Modulated  Power Supply    e 2 Ohm stable stereo operation  with output power increase    e Thermal and speaker short  protection    e Soft turn on circuit   e Remote turn on turn off circuit  e Variable input gain control   e Variable low pass crossover s   e Fixed high pass crossover s    e Variable 0 to  18dB Bass Boost    e Nickel plated RCA low level and  high level inputs    e LED power and protection  indicators    e Black anodized heatsink    e Remote subwoofer level control    About 2 Ohm operation    Your RIOT amplifier has   been designed to operate efficiently  at loads down to 2 Ohms  This  means that you can install four   8 Ohm speakers per channel  when  using parallel wiring     Doubling the number of woofers  produces an ac
20. r heavier  wire     2  Connect the remote terminal to the  remote output of the head unit using  16 gauge  or heavier  wire     3  Connect an empty fuse holder within  18   45 cm  of the car battery  and run  8 gauge  or heavier  cable from this  fuse to the amplifier location     4  Check that the fuse holder is empty   Then connect the fuse holder to the   BATT   connection on the amplifier     5  If multiple amplifiers are being used  in your system  either     e Run a separate pair of cables from  the battery and a chassis ground point  to each amplifier  Each     cable must  have its own inline fuse     or   e Run a  4 cable from the fuse holder  at the battery to a distribution block  at or near the ampilifier s location  Then  run separate cables from the amplifier  to this distribution block and to  independent chassis ground points     6  Connect all line inputs and outputs   if used  using high quality cables   Connect all speakers  following the  diagrams in this manual  Be sure to  observe proper polarity to avoid audio  phase problems     7  Insert fuse s  into the battery fuse  holder s      8  Recheck all connections before  powering up the amplifier     9  Set all level controls to minimum  position  and set all crossover  controls switches to the desired  frequency points     10  Power up the head unit and the  amplifier  Then set the volume control  on the head unit to about 3 4 volume   and adjust the amplifier   s input level  control s  to just below the 
    
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