FPD 900.1 : ONE CHANNEL AMPLIFIER Operation / Configuration
Contents
1. MASTER gt SUBWOOFER REMOTE VOLUME CONTROL LED LIGHT 1 While playing music the LED light should be Green Occasional red LED light flash indicates that the amplifier has reached maximum loudness If the red LED light flashes with the beat of the music TURN DOWN THE VOLUME before you damage your speaker If the red LED light is on continuous TURN DOWN THE VOLUME before you damage your speaker2. will have DIRECT switch selected Crossover and level controls will only function on amplifier 1 By selecting DIRECT on amplifier 2 3 4 all crossover and level controls are bypassed and the LEFT input channel must be used Master Amplifier 1 will receive the source signal on left and right channel Master Amplifier 1 RCA out will connect to direct amplifier 42 3 4 RCA LIN The LEFT input channel must be used One speaker amp will connect to one Amplifier s amp A4 2 AMPS PARALLEL MASTER 2 240 ES C Tee qux 60 uw 20 t TUE 40 350 0 180 o GND REM BATT SUB LP PHASE EQ m DIRECT 40Hz Y C Sia Bon 9 5350 0 180 0 6dB SUB LP PHASE EQ J E TROUBLESHOOTING gt FOCAL SIGN DOES NOT LIGHT 1 Measure the voltage at the amplifier power terminal It should be between 12 and 15 volts 2 Measure the voltage at the amplifier REM terminal It should be between 12 and 15 volts 3 If you are using BTL high level for automatic turn on try connecting a REM wire 4 Check your power and ground connections to be correct polarity and and they are tight 5 Check battery connections 6 Check the fuse in the REM wire T Check fuse at battery 8 Check fuse inside amplifier The fuse is inside the right end cap beside the power terminals The recommen
3. FPD 900 1 ONE CHANNEL AMPLIFIER Operation Configuration POWER PER CHANNEL 1 X 500W into 4 ohm 1 X 850W into 2 ohm 1 X 500W into 1 ohm Two amplifiers can be Bridged 1 X 1700W into 4 Ohm Two amplifiers can be Bridged 1 X 1000W into 2 Ohm INPUT OUTPUT CONFIGURATIONS Because this is a one channel amplifier if both left and right inputs are used they are mixed to mono which is useful for subwoofers CROSSOVER CONFIGURATION The 24 dB per octave crossover can be adjusted so this amplifier can function as 1 2 3 4 Full range Low Pass for a subwoofer Band Pass for a subwoofer or midbass of a 3 way speaker High Pass for a midbass midrange or tweeter The amplifier can be used full range with switch in HP position and frequency set to 10 Hz HP is always on so it can be used as a subsonic filter HP X1 frequency range is 10 Hz to 400 Hz HP X10 frequency range is 100 Hz to 4000 Hz LP Adjustment range is 30 Hz to 350 Hz Band Pass with switch in LP position and adjusting both HP and LP to desired frequency The remote volume control is always active There is a clip distortion light on the remote volume control If you see this light on reduce volume until the light goes out so that you do not damage your speaker Phase is continuously adjustable between 0 degrees and 180 degrees Adjust by measuring frequency response at the crossover frequency Frequency response should be as smooth as possible 40 Hz E
4. Q is adjustable between 0dB and 6dB Measure the subwoofer frequency response and adjust EQ to get the smoothest frequency response Avoid excess EQ boost because this will make the subwoofer sound muddy and cause the amplifier have clip distortion prematurely AUTOMATIC POWER TURN ON OFF 1 2 The best way to automatically turn the amplifier power on and off is to use the REM wire from your source radio connected to the REM amplifier terminal If your original equipment stereo or source radio has a BTL amplifier then the RCA inputs have an auto turn on sensing circuit When you connect the high level BTL speaker wires to the RCA input the REM wire is not necessary RCA INPUT BOTH LOW LEVEL AND HIGH LEVEL The amplifier LEVEL control has sufficient adjustment range for both low level and high level input into the RCA jacks A factory source radio that does not have RCA output using the wires that are connected to the speakers can be directly connected to the RCA jacks when the amplifier LEVEL control is adjusted to 8V SETTING LEVEL e Set the amplifier LEVEL control to minimum before you turn on the amplifier for the first time e For lowest distortion and lowest noise the amplifier LEVEL should be set at the lowest setting that yields sufficient loudness without distortion For lowest noise your source radio volume control should be near maximum that does not cause distortion e To find the best amplifier LEVEL setting Wit
5. ded ATC fuse size is two 25 amp gt FOCAL SIGN IS FLASHING 1 Is the amp very hot Wait a few minutes for it to cool down You need to get more fresh cool air to the amplifier Do not cover the amplifier or mount it flush into a hole 2 If the amp is cold and the Focal sign is flashing there is an internal fault The amplifier must then be returned for service gt NO SOUND 1 Is the Focal sign light off or flashing 2 Is the source radio on and is there a sound signal coming from the source radio 3 Use an ohm meter and measure the speaker wires for short circuit 4 Check connections for small wire whisker that may be shorting between amplifier terminals or speaker terminals 5 Use an ohm meter and measure the speaker for short circuit 6 Double check your connections to the source radio T Are you using the correct source radio wires and are they plugged into the correct amplifier RCA 8 Double check your connections to the speakers and speaker crossovers es Check that all amplifier switches are in the correct positions for your speaker set up gt AMPLIFIER BLOWS FUSE WHEN YOU TURN IT ON i Power and ground may be reversed Check and polarity at amplifier and at battery gt SUBWOOFER REMOTE VOLUME CONTROL DOES NOT FUNCTION Ts 2 Check that Remote Volume Control wire is plugged into the amplifier securely The Remote Volume Control will not function if the amp switch is DIRECT The switch must be in
6. h the amplifier LEVEL at minimum slowly increase the source radio volume to around 3 4 without distortion Then slowly turn up the amplifier LEVEL control to the maximum desired loudness Listen very carefully and turn down the amplifier LEVEL control if you hear any distortion SETTING SUBWOOFER HIGH PASS SUBSONIC FILTER A subwoofer should have a high pass filter often called a subsonic filter The purpose of a subsonic filter is to limit very low frequencies that your subwoofer can not play loud enough without damage Removing subsonic frequencies can allow your subwoofer to play louder e For a sealed box the high pass is typically set between 10 Hz and 30 Hz to increase power handling capacity For a vented box the high pass filter must be set 5 Hz lower than the port tune frequency to prevent woofer damage ONE AMPLIFIER IN HP LP OR BP MODE Dy voor HP 50Hz x1 MASTER TT __ 40Hz HP LP x10 xl 150 50 85 e e 240 e P 22 9115 P SE Jem Zeg Y ZO KM 409 350 oc 180 tag E 400 ee RANGE LP PHASE EQ HP LEVEL GND REM BATT Jdomz o REMOTE SUB CONTROL 4 SUBWOOFER B max 3 oo GND REM BATT FX i h 8dB TWO AMPLIFIERS IN BRIDGED MODE TWO FPD 900 1 amplifiers are required Amplifier 1 will have MASTER switch selected Amplifier 2 will have DIRECT switch selected Crossover and level co
7. ntrols will only function on MASTER amplifier 1 By selecting DIRECT on amplifier 2 all crossover and level controls are bypassed and the LEFT input channel must be used Master Amplifier 1 will receive the source signal on left and right channels Master Amplifier 1 RCA out will connect to direct amplifier 2 RCA LIN The LEFT input channel must be used The speaker will connect to Amplifier 1 speaker The speaker will connect to Amplifier 2 speaker The speaker on Amplifier 1 will connect to speaker on Amplifier 2 A3 2 AMPS BRIDGED REMOTE SUB CONTROL 40Hz HP LP GND REM BATT 85 Ex 240 Es vM Zo UOS ded d 4 Ne i 40 350 0 180 or 6dB LP PHASE EQ LEVEL CONTROL DIRECT Le X SUBWOOFER HQ 40Hz GND REM BATT 150 4 lar aiio tales ITN Ga peto Gp meas 40 350 0 180 0 6dB LP PHASE EQ CONTROL MULTIPLE AMPLIFIERS IN PARALLEL CASCADE MODE TWO or more FPD 900 1 amplifiers are required e Use this mode when you have several speakers that will use the same crossover and loudness setting and will have one amplifier on each speaker One example is a dual voice coil subwoofer and you use one amplifier on each voice coil e A second example is you have several subwoofers and will use one amplifier on each subwoofer Amplifier 1 will have MASTER switch selected Amplifier 2 3 4
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