Fusion FM-504 - Control Descriptions; Power And Status LEDs; Crossover Selector; Low Pass Filter

Control Descriptions
004
CONTROLS 005 CONTROLS
L R
BRIDGE MODE
FUSEFUSE
FRONT
REAR
FE-504
13 15
11 12
FUSEFUSE
FRONT
REAR
L R
MONO
14
20 HZ 55 HZ 8 V 0.3 V0 DB +18 DB
40 HZ 600 HZ40 HZ 160 HZ
LP
REM+12VGND
HP LEVELSUBSONIC
20 HZ 55 HZ 8 V 0.3 V0 DB +18 DB
40 HZ 600 HZ40 HZ 160 HZ
LP HP LEVELSUBSONIC
BASS BOOST
BASS BOOST
OFF LP HP
REAR X-OVER
SELECTOR
FRONT X-OVER
SELECTOR
OFF LP HP
INPUT
FRONT
INPUT
REAR
OUTPUT
L LL
R RR
PWR
PRT
10987654321
4 CHANNEL • FULLY REGULTED 2 OHM STABLE • Bridgeable MOSFET Amplifier
FM-504
FM-504
1 Power And Status LEDs:
 thisshowsiftheamplierhasbeencorrectlypoweredupandifanyfaultsarepresent.
2 Crossover Selector:
 Settheappropriatemodeofoperation.The3positionsavailableareOFF,LPandHP.Seepoints3and4below.
3 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.
4 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.
5 Bass Boost:
Thisisavariablecontroltoincreasethebassboostat45Hzfrom0-+18dBofgain,adjusttosuit.
6 Subsonic Filter:
 ThisisavariablecontrolltersoutallSubBassFrequenciesbelowthesetpointat18dB/octave.
7 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.
8 Front RCA Input:
 ConnecttheseRCAconnectorstothefrontLOWLEVELoutputconnectionfromtheheadunit.
9 Rear RCA Input:
 ConnecttheseRCAconnectorstotherearLOWLEVELoutputconnectionfromtheheadunit.
10 RCA Output:
 UsetheseRCAOutputconnectorstoconnecttoasecondaryamplier.ThisoutputisaSUMMEDOUTPUTcon-
nectionderivedfromthefrontRCAinputandtherearRCAinputconnectors.
11 Ground Connection:
 Connectdirectlytosuitablegroundpointviaa4gaugepowercable.NOTE:Thisistobetherstwiretocon-
nectwhenwiringupampliers.Damagecouldresultofthisisnotdone.
12 +12V Connection:
 Thismustbeconnectedtothebatterypositive(+)terminalviaa4gauge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.
13 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.
14 Fuses:
 Pleaseensurethecorrecttypeoffuseistted,asspeciedinthismanual.PLEASENOTE:theFM-504has2x
25Afuses.
15 Speaker Output:
 See4/3/2channelinstallationdiagramsinthismanualforcorrectspeakerconnection.