Boss Audio Systems Marine
Contents
1. Specifications OSS gt OU Uc LU Ue Four Channel Marine Amplifier with Public Address System MODEL MR1200PA RMS POWER 150W x 4 into 4 Ohms MAX POWER 300W x 4 into 2 Ohms BRIDGED POWER 600W x 2 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 7 3 8 x 2 1 4 x MR1200PA User s Manual page 16 2 Ohm Stereo 4 Ohm Mono Bridged 0 01 6Hz 50kHz 102dB 90dB 125 40Hz 150Hz 200Hz fixed 0 18dB 40A x 1 12 3 4 All specifications subject to change without notice2. 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 from speakers Check for improperly grounded RCA interconnects 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 very hot Check that the minimum speaker impedance for the amp model is correct Check that there is good air circulation around the amp In some applications it may be necessary to add and external cooling fan Engine noise static type 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 alternator whine Check that speaker leads are not shorted to the marine vessel chassis Check that the RCA grounds are not shorted to the marine vessel chassis Check that the head unit is properly grounded MR1200PA User s Manual page 15
3. 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 and fixed high pass crossovers e Variable bass boost 0 to 18dB e Exclusive protective coating on PC board to prevent damage from humidity e LED power and protection indicators e Silver heatsink e Remote subwoofer level control About 2 Ohm operation Your 399S Marine 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 Increasing the number of woofers per channel at low frequencies below 100Hz produces an acoustic coupling effect This acoustic coupling effect increases your power output by about 3dB per speaker or the equivalent of an additional 10W per speaker 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 MR1200PA User s Manual page 3 General precautions Before installing and using your new 3995 Marine amplifier please be come familiar with all the informa tion c
4. 3088S D Cicer Ua MR1200PA Four Channel High Power MOSFET Marine Audio Amplifier and Public Address System Congratulations on your purchase of a 399S Marine 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 3995S Marine your choice for AUDIO SYSTEMS marine audio entertainment USER S MANUAL page CONTENTS 2 introduction 2 What is included 3 Features 3 About 2 Ohm operation 4 General precautions 4 Protection circuitry 5 Installation precautions 5 Fuses 6 Mounting the amplifier 6 Connecting the amplifier 8 Low level input wiring 9 High level input wiring 11 Microphone input wiring 12 Power and speaker wiring 15 Troubleshooting 16 Specifications MR1200PA User s Manual page 16 Introduction An important member of the BOSS Marine MOSFET amplifier series we are pleased to introduce the unique MR1200PA a powerful amplifier with public address capabilities This 399S Marine models features both high pass and low pass crossovers For further flexibility in the use of a subwoofer a variable bass boost control has been included You can control the subwoofer level with the remote level control module 3935 Marine understands that amplifiers are placed in many different kinds of installations so we have also included an input sensiti
5. ENS MODE CHANNELS f aso AA AA AT D ions 4 3 a me ons ax ee FUL RANGE LOWPASS BASSBOOST INPUTLEVEL 100n 2v 2V 5V 9 L HIGH LEVEL Input Mode switch in Hearts this 4CH Position installation ACH 2CH INPUT MODE Remote subwoofer level control O Oooooocoo To Front and Rear Audio Outputs of head unit or signal processor 4 Channel Amplifier with 2 Channel Audio input Source MR1200PA MRi2z00Pa FOUR CHANNEL POWER AMPLIFIER BOSS marine PASS BASS BOOST INPUTLEVEL INPUT SENS ORORO CHANNELS 3 4 AUDIO INPUTS 2 CROSSOVER ia mu DADI LOWPASS BASSBOOST INPUTLEVEL 100m 2v 2v ev A INPUT meursens N MODE L ROSSON HIGH LEVEL INPUTS not used in this installation a ACH 2CH Remote subwoofer INPUT level control MODE Input Mode switch in 2CH Position O To L R Audio Outputs me of head unit or signal processor MR1200PA 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 p
6. T SENS t LOWPASS BASSBOOST INPUTLEVEL 100mV 2v AV 8vV ONTROL cHie2 Mic ON Audio Input OFF Switch Volume control Seo Microphone included MR1200PA User s Manual page 11 Power and Speaker Wiring 4 Channel Amplifier MR1200PA Four Channel Mode conus senna Q cE 30388 D marine Q BLACK Chassis ne WHITE point to REMOTE TURN ON H CH1 ORANGE terminal of head unit Speaker WHITE BLACK RED GREY a af cue provided GREY BLACK GREEN H CH3 im Speaker GREEN BLACK PURPLE CH4 Speaker PURPLE BLACK MR1200PA User s Manual page 12 Power and Speaker Wiring 4 Channel Amplifier MR1200PA Bridged Mode POWER CONNECTIONS SPEAKER 0 mice S 3088 Dmarine Connect the CH1 lead to the Subwoofer 1 terminal Connect the CH2 lead to the Subwoofer 1 terminal Chassis ground point to REMOTE TURN ON terminal of head unit WHITE ORANGE RED SUBWOOFER 1 GREY BLACK Battery SPEAKER provided IMPEDANCE 4 8 OHMS SUBWOOFER 2 PURPLE BLACK Connect the CH3 lead to SPEAKER the Subwoofer 2 terminal IMPEDANCE 4 8OHMS Connect the CH4 lead to the Subwoofer 2 terminal MR1200PA User s Manual page 13 Speaker Wiring 4 Channel Amplifier MR1200PA Tri mode o
7. aker connections for your particular installation Be sure you understand all the connections before you proceed 1 Connect the ground terminal to the closest point on the chassis of the marine vessel Keep this ground wire to less than 39 100 cm in length Use 8 gauge or 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 boat s 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 gauge cable from the fuse holder at the battery to a distribution block at or near the amplifier 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
8. 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 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 MR1200PA User s Manual page 7 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 4 Channel Amplifier with 4 Channel Audio Input Source MR1200PA 3995S D marine F RANGE LOWPASS BASSBOOST INPUTLEVEL INPUTSENS gms nao O FOA Q CROSSOVER oN Ason Nisas m CHANNELS 3 4 9 2 ZELITE INPUT INPUT S
9. his 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 comes on when amplifier is powered up Check for short circuits on speaker leads Turn down the volume control on the head unit to prevent overdriving Remove speaker leads and reset the amplifier If the Protection LED still comes on then the amplifier is faulty and needs servicing No output 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 Low output Reset the Level Control Check the Crossover Control settings Audio present in only one channel Check the RCA interconnect cables Check all speaker wiring High hiss in the speakers Disconnect all RCA inputs to the amplifiers If the hiss disappears then
10. inated If you observe that the PROTECT LED is on please check the system carefully to determine what has caused the protection circuit to engage To reset the amplifier when it is in PROTECT mode turn the power off to the system usually by turning off the head unit or other signal source which feeds the amplifier and then turn it on again If the amplifier has shut down due to thermal overload you should first allow it to cool down before restarting If the shut down was due to either an input overload or a short circuit be sure to correct these conditions before attempting to power up the amplifier again Installation precautions Before you drill or cut any holes investigate your vessel 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 within the amplifier to prevent damage especially in an accident Do not mount this amplifier so that wire connections are unprotected in a pinched condition in contact with any metal surfaces in your marine vessel or likely to be damaged by nearby objects Before making or breaking power connections in your system disconnect the marine vessel 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 f
11. is with 2 Channel Audio Input Source a J installation r RANGE LOWPASS BASS BOOST INPUTLEVEL INPUT SENS mormon Te ae ey BOSS Dmarine aMbii fide 0 LO OO ructince LOWPASS BASSBOOST NPUTLEVEL ool o Input Mode switch in iti HIGH LEVEL an 2CH Position CH3 4 INPUTS not A used in this NJ installation ACH 2CH INPUT MODE Remote subwoofer level control R R PURPLE GREEN BLACK L L WHITE BLUE To LEFT and RIGHT Speaker Terminals of head unit or signal processor MR1200PA User s Manual page 10 Microphone Input Wiring If you wish to use the public address feature in the MR1200PA all you need to do is to connect the custom microphone included with the amp When you press the button on the microphone it automatically cuts off the input to Channels 1 4 from your audio source and presents the microphone signal to the amplifier You can use the microphone to supplement either 2CH or 4CH audio input from your signal source In any case when the mic switch is engaged your audio input will be silenced until the switch is released PA HANNEL POWER AMPLIFIER CH3 4 Pn AUDIO el ay a a INPUTS CROSSOVER aN sone Nimas ww x oma wav dak uien INPUT INPUTS MODE CHANNELS T 2 aL On D D INPU
12. olarity 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 4 Channel Amplifier LOW LEVEL MR1200PA INPUTS not used in this with 4 Channel Audio Input Source installation BOSS D marine Uli RANGE LOWPASS BASS BOOST INPUTLEVEL INPUT SENS PROTECTION CHANNELS 1 2 INPUT SENS LOWPASS BASSBOOST INPUTLEVEL on 2v 2 8 Input Mode switch in 4CH Position ACH 2CH INPUT MODE Remote subwoofer level control CH4 CH4 PURPLE GREEN CH3 CH3 WHITE BLUE BLACK CH2 CH2 PURPLE GREEN CH1 CH1 WHITE BLUE BLACK Ok To FRONT and REAR L R Speaker Terminals of head unit or signal processor MR1200PA User s Manual page 9 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 N N 4 Channel Amplifier re Qa LOW LEVEL lt MR1200PA AD INPUTS not 3 i Sa used in th
13. ontained 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 cord and send the amplifier to your local dealer or service center as soon as possible 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 MR1200PA User s Manual page 4 Protection Circuitry This amplifier incorporates special protection circuitry which will disable the amplifier if any of the following should occur e Input overload e Short circuit e Extremely high temperatures If any of these conditions is detected the amplifier will go into a self preservation mode and the PROTECT LED on the model number badge on top of the amplifier will be illuminated What should do if my amplifier PROTECT LED is illum
14. peration 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 switch 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 CONNECTIONS SPEAKER 0 ce 3088 Dmarine BLACK High pass filter capacitors Chassis MINIMUM d SPEAKER int WHITE IMPEDANCE F 4 OHMS to REMOTE TURN ON CH1 ORANGE terminal of head unit Speaker RED o WHITE BLACK co o GREY MINIMUM SPEAKER FUSE IMPEDANCE provided GREY BLACK 4 OHMS J E Low pass filter inductor i SPEAKER A SUBWOOFER 8 0HMS SUBWOOFER Component values for 6dB Passive Crossover High pase filter FREQUENCY INDUCTOR CAPACITOR MINIMUM 80 Hz 7 5mH 470uF GREEN SPEAKER 100 Hz 6 5mH 330uF AL cng Torms 120 Hz 5 5mH 330uF i s k 150 Hz 4mH 220uF GREEN BLACK Pee MINIMUM IMPEDANCE SPEAKER OHMS PURPLE IMPEDANCE z CH4 4 OHMS Low pass PURPLE BLACK Speaker filter inductor MR1200PA User s Manual page 14 Troubleshooting If you experience operation or performance problems with t
15. use 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 Fuses Power fuses protect both the amplifier and the electrical system of your boat from fault conditions If you must replace a fuse in your Marine amp use a fuse of exactly the same type and rating Using a different type or rating of fuse may result in damage to your amp or marine vessel or cause a fire MR1200PA User s Manual page 5 Mounting the amplifier 1 Find a suitable location in the marine vessel 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 and attach the amplifier to the mounting surface securely using screws MR1200PA User s Manual page 6 Connecting the amplifier Before doing any wiring look through this manual and identify the diagrams to follow for power input and spe
16. vity control to help you integrate the amp into your system regardless of the nature of your input source A custom microphone is included Pressing the button on the microphone will mute the audio and allow you to be heard easily by others on your boat 3995 Marine amplifiers are constructed using a special corrosion resistant coating on the printed circuit board to prevent damage from the high humidity of the marine environment In order to prevent the intrusion of water into the amplifier enclosure we have provided the connections at the end of waterproof wires cables and tightly grommeted the wires as they pass through the end panels An additional important unique component is the rubber pad which seals all control openings MR1200PA 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 player e Marine amplifier e Custom microphone and mounting bracket e High input cable with connector s e Speaker output cable with connector s e Remote level controller e Four 4 mounting screws Features Your new BOSS Marine amplifier AUDIO SYSTEMS features the following e Class A B operation e Bridgeable outputs e TriMode capable e Designed to work as full featured PA Public Address System with included microphone e
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