The.rear.panel - Blackheart BH15H Handsome Devil User Manual

The Rear Panel
HANDSOME DEVIL 15 - PUSH PULL/CLASS A AMPLIFIER
4 OHMS 4 OHMS
12
The.rear.panel.has.connections.for.the.AC.
power.cord.and.external.speaker.cabinets.
WARNING!.Never.turn.on.or.use.the.ampli-
fier.without.a.load.or.speaker.connected.to.
the.amplifier..
9. AC Power Input with Mains Fuse:.
The.amplifier.is.equipped.with.a.detach-
able.power.cord.that.plugs.into.this.
IEC.Mains.socket..The.AC.power.cord.
should.only.be.plugged.into.a.grounded.
power.outlet.that.meets.all.applicable.
electrical.codes.and.is.compatible.
with.the.voltage,.power,.and.frequency.
requirements.stated.on.the.rear.panel.
of.the.amplifier..Do.not.attempt.to.
defeat.the.safety.ground.connection..
The.AC.Mains.fuse.is.located.in.the.IEC.
Mains.socket.and.is.used.to.protect.
the.amplifier.from.electrical.faults..If.
the.fuse.needs.to.be.replaced,.please.
refer.to.the.correct.fuse.specifications.
located.on.the.back.panel.of.the.ampli-
fier..Always.unplug.the.power.cord.
when.changing.or.inspecting.the.fuse..
Never.bypass.the.fuse.or.replace.it.with.
a.wrong.type.or.value..
10. 16 OHMS:.This.output.can.power.an.
external.speaker.cabinet.rated.at.16.
ohms.(see.top-left.figure.on.next.page).
11. 8 OHMS:.The.two.8.ohms.speaker.out-
put.jacks.are.wired.in.parallel..See.the.
connection.examples.on.the.next.page.
12. 4 OHMS:.The.two.4.ohms.speaker.out-
put.jacks.are.wired.in.parallel..See.the.
connection.examples.on.the.next.page.

LOUDSPEAKER OUTPUTS
POWER OUTPUT 15 WATTS RMS
CONNECT SPEAKERS BEFORE USE
8 OHMS 8 OHMS
11
16 OHMS
10
Connecting speaker cabinets
The.hookup.diagrams.on.the.next.page.
show.some.different.cabinets,.their.imped-
ance,.where.to.plug.them.in,.and.the.total.
load.impedance.placed.on.the.amplifier.
ALWAYS.use.good.quality.(non-shielded).
speaker.cable.to.connect.speaker.cabinets..
Never.use.(shielded).instrument.cable.
ALWAYS.match.the.amplifier's.speaker.
output.impedance.to.the.impedance.of.the.
speaker.that.is.being.used.
•
Use.only.one.type.of.impedance.output.
at.a.time.
•. If.more.than.one.speaker.is.connected.
at.the.same.time,.make.sure.they.all.
have.the.same.impedance.rating.
•. Never.use.two.or.more.cabinets.with.
different.impedance.ratings..This.will.
create.an.unbalanced.load.
•. When.using.multiple.speaker.cabinets.
(with.the.same.impedance.rating),.
match.the.total.load.impedance.of.the.
speaker.cabinets.to.the.speaker.output.
of.the.amplifier.
For.equal-impedance.speakers.connected.in.
parallel,.the.first.law.of.rock.and.roll.states:
SPEAKER.CABINET.IMPEDANCE.divided.by.
NUMBER.OF.CABINETS.=.TOTAL.LOAD
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