Marshall Amplification 1974X - Rear Panel Functions; Footswitch and Speaker Connections; Output Impedance Selector; Fuses and Power Inlet

ENGLISH
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REAR PANEL FUNCTIONS
1. TREMOLO FOOTSWITCH JACK
ThisiswherethesuppliedTremoloon/o
footswitchispluggedin.
2 & 3. SPEAKER OUTPUTS
Connectoneortwospeakercabinetshereusing
1/4”jackspeakercables.
Warning: alwaysensuretheoutputimpedance
selectorissettotheappropriateimpedancefor
theloadofyoursetup(speakercabinets).Never
usethisampwithoutaspeakerorload.
4. OUTPUT IMPEDANCE SELECTOR
Matchestheamp’soutputtotheload
impedance.Ensuretheampiscompletely
powereddownbeforeturningtheselector.
Theimpedanceselectedontheampmust
matchthetotalimpedanceoftheinternal
speakerorexternalspeakercabinet(s)being
used.
• Whenusingthecombo’sinternalspeaker
only,theimpedanceselectormustbesetto
16Ω.
• Ifanaddional16Ωextensionspeaker
cabinetisusedinconjunconwiththe
internalspeakertheimpedanceselector
shouldbesetto8Ω.
Note: anextensionspeakercabinetwithan
impedanceoflessthan16Ωshouldnotbeused
inconjunconwiththeinternalspeaker.
Warning: failuretocomplywiththesepointsmay
resultindamagetotheamp.
5. MAINS FUSE
Thecorrectvalueofthemainsfuseisspecied
ontherearpanel.
6. H.T. FUSE
ThecorrectvalueoftheH.T.fuseisspecied
ontherearpanel.
7. POWER INLET
Thesuppliedmainspowerleadisconnected
here.Themainsinputvoltagerangthatyour
amphasbeenbuiltforisshownontherear
panel.
8Ω
16Ω
4Ω
V1 V2 V3 V4 V5 V6
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