Control Descriptions
004
CONTROLS
005
CONTROLS
10 11987654321
13 15 1612 14
1 Bass Remote Selector
 Usethisswitchtoactivateordeactivatethe(optional)FP-BASScontroller.
2 Bass Remote Connector
 Thisportallowsconnectionstothe(optional)FP-BASScontrol.
3 Power And Status LEDs:
 thisshowsiftheamplierhasbeencorrectlypoweredupandifanyfaultsarepresent.
4 Crossover Selector:
 Settheappropriatemodeofoperation.The3positionsavailableareOFF,LPandHP.Seepoints5and6below.
5 Low Pass:
 Setthecrossoverswitch2toLPwhenasubwooferisconnected.Ensurethecrossoverfrequencyissetat
100Hzorbelow,thisfeatureisdesignedtolterallmidtohighfrequenciesthatonlyFULLRANGEspeakers
shouldproduce.NOTE:Failuretodosocouldresultinspeakerdamage.
6 High Pass:
 Setthecrossoverswitch2toHPandturnthiscontrolto65Hzorabovewhenusingspeakerssmallerthan6
x6”,thisfeatureisdesignedtolteralllowbassfrequenciesthatonlySUBWOOFERSshouldproduce.NOTE:
Failuretodosocouldresultinspeakerdamage.
7 Bass Boost:
Thisisavariablecontroltoincreasethebassboostat45Hzfrom0-+18dBofgain,adjusttosuit.
8 Subsonic Filter:
 ThisisavariablecontrolltersoutallSubBassFrequenciesbelowthesetpointat18dB/octave.
9 Level:
 Thisallowsleveladjustmentoftheinputsignal.Usethiscontroltocorrectlymatchtheheadunittothe
amplier.Tosetthiscontrolcorrectly,turntheamplierleveltoMINandtheheadunitto3/4volume,with
theBASSandTREBLEonzero,thenslowlyturnupthisamplierlevelcontroltowardstheMAXendofthe
control.NOTE:Ifthesoundbecomesdistorted,turnthiscontroldown.
10 RCA Input:
 ConnecttheseRCAconnectorstotherearLOWLEVELoutputconnectionfromtheheadunit.
11 RCA Output:
 UsetheseRCAOutputconnectorstoconnecttoasecondaryamplier.ThisoutputisaPASS-THRUconnection
derivedfromtheRCAinputconnectorsothesignallevelandfrequencyresponsearethesameastheoriginal
inputsignal.
12 Ground Connection:
 Connectdirectlytoasuitablegroundpointviaa4gaugepowercable.NOTE:Thisistobetherstwireto
connectwhenwiringupampliers.Damagecouldresultofthisisnotdone.
13 +12V Connection:
 Thismustbeconnectedtothebatterypositive(+)terminalviaa4guagepowercableandwithaninlinefuse
orcircuitbreakeratthebatteryend.NOTE:Thisistobethelastwiretoconnectupduringinstallationas
damagecouldresult.
14 Remote Connection:
 Thisinputisforturningtheamplieronando.Thisrequiresaswitchedpositive(+12V)topower‘ON’the
amplier,thiscanbefoundontherearoftheheadunitintheformofanelectricantennaoutput,oraremote
onoutput.IfnotavailableyoucanwiretotheACCpositiononthekey.
15 Fuses:
 Pleaseensurethecorrecttypeoffuseistted,asspeciedinthismanual.PLEASENOTE:theFM-402has1x
25Afuses.
16 Speaker Output:
 See2/1channelinstallationdiagramsinthismanualforcorrectspeakerconnection.