Specifications

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2.5 SPEAKERIMPEDANCE&POWERWIREINFO
3. AMPLIFIERMOUNTING
Warning:Foryourownsafety,disconnectthenegativebatteryterminal(GND)and
removethemainfuse(ofexistingsysteminstalls)inthepositivepowercablenearthecar
battery,beforeyoustartanyinstallationorwiringwork!
BeforeyouproceedtoinstallthisEMPHASERamplifier,itisrecommendedtomapoutthecom-
pleteaudiosystemandtherespectivewiringrequired.Consideralladditionalelectricalrequire-
mentsandaccessories,suchaspowercables,interconnectcablesetc.,tocompletethisinstall.
Pleasenotethat-becauseofpossibleinterferenceproblemswiththeexistingcarelectricsand
electronics-especiallytheroutingofthesignalcablesandthechassisgroundconnectionwill
haveaprofoundimpactonthetrouble-free(noisefree!)operationoftheamplifier.
Themountinglocationshouldbecarefullyselectedandintheinterestofpassivedriverandpas-
sengersafety,theamplifiermustbesecurelymounted.Makesurethatthereisnowiringharness,
fueltanketc.behindorbelowthemountingsurface,thatmaybedamagedbythedrillingofthe
holesfortheamplifiermountingscrews.Afterinstallation,thereshouldbeaclearanceofatleast
5cmtoallsidesincludingthetopoftheamplifierheatsink.Makesuretheunitisnotexposedto
directsunlight,humidity,water,oilorspillofotherfluidsthatmayentertheamplifier.
Oncethelocationwheretheamplifierwillbemountedisdefined,usetheunitasatemplatefor
themarkingofthemountingholeswithpencilorfelt-tipmarker.Themountingholesshouldbe
pilot-drilled,usinga2,5mmor3mmdrillbit.Fortheactualmounting,alwaysusethesupplied
rubberwashersbeforeattachingtheamptothepanelwiththesuppliedmountingscrews.
Important!Theremustnotbeadirectcontactoftheamplifierheatsink,bottompanelor
anyothermetalpartoftheamplifiertothevehicle!Electricalground-loopscanresultin
audiblehum!
Theheatdissipationcapacityofthisamplifierlinehasbeendesignedtocopewithlowimpedance
loads.However,EMPHASERlaboratoriesrecommendtostayatorabovethesuggestedimpe-
danceratingslistedbelow:
EA1450XT
➡ 4ohmsmono/2ohmsmono
EA2250XT
➡ 4/2ohmsstereo/4ohmsbridged
EA4150XT
➡ 4/2ohmsstereo/4ohmsbridged
EA460-300XT
➡ 4/2ohmsstereoCH1-4/4/2ohmsmonoCH5
Note:EMPHASERlaboratoriesrecommendaminimummainpowercablecross-section(5m
totallength)of25to35mm²,forboththepositiveandthegroundwires.Theserecommendations
guaranteetrouble-freeoperationofyouramplifier,givingyoufullpoweroutput.