B-52 US-5000 Owner's Manual - Us Series Amplifiers
THE BEAUTY OF POWER
B-52 US Series Professional Power Amplifiers - Instruction Manual
US SERIES AMPLIFIERS
is not referenced to the ground. In this mode the chan-
nel 2 input is inactive.
NOTe:SeetheCONNECTIONSsectionlaterin
thismanualformoredetailsonPARALLEL
MONOandBRIDGEDMONOmodes.
WARNINg:
DONOTchangesettingsofthe
BRIDGE/STEREO/PARALLELswitchwhen
amplifierisON.AlwaysturnamplifierOFFand
connect output cables and input cables appro-
priately first, then set the switch in desired
positionBEFOREturningamplifierbackON.
WARNINg:DONOTchangesettingsofthe
BRIDGE/STEREO/PARALLELswitchwhen
amplifierisON.AlwaysturnamplifierOFFand
connect output cables and input cables
appropriately first, then set the switch in desired
positionBEFOREturningamplifierbackON.
7. BINdINg POST OUTPUTS
Use the binding posts to connect your loudspeakers
to the amplifier. Binding posts are a good option for
fixedinstallationsorwhenyoudonothaveSpeakon
fitted speaker cables. The high-quality insulated bind-
ing posts offer a variety of connection options. Use
speaker wires with stripped ends (do not strip them
morethan½”or12.5mm),usingtheholesonthe
bottomofthebindingposts.Ensurethatnopartof
thespeakerwireisexposedwhenconnectedtothe
bindingposts.Alternatively,youcanalsousespeaker
cablesterminatedwithstandardbananaplugs.Make
sure that no part of speaker wire or banana plugs are
exposedwhenconnectedtothebindingposts.
NOTe: US-Series amplifiers configured for use
inEuropeareprovidedwithpermanentplastic
inserts which prevent using banana plugs for
speaker connection. This is a safety measure
requiredbyEuropeansafetylaws.
NOTe:IntheBRIDGEDmode,theloudspeaker
must be connected using the two red binding
posts.Thepositive(+)wirefromtheloudspeaker
must be connected to the Channel 1 red post,
and negative (-) wire from the loudspeaker must
be connected to the Channel 2 red post, as
indicated on the rear panel just below the
binding posts.
WARNINg:NEVERCONNECTspeakerswith
an impedance lower than the rated minimum
impedance of the amplifier. The lowest
impedanceinSTEREOandPARALLELmodesis
2Ohmsforeachchannel.Thelowestimpedance
inBRIDGEDmodeis4Ohms.NEVER
CONNECT2Ohmsratedloudspeaker(s)or
a combination of speakers to the amplifier in
theBRIDGEDmode.
NOTe:RefertotheCONNECTIONSsection
later in this manual for speaker wire connection
diagrams.
8. SPeAkON™ OUTPUT CONNeCTORS
Use these speaker outputs to connect cables fitted with
Speakon™ cable connectors. US-Series amplifiers
have two connectors, one for each channel, to con-
nect Speakon™ fitted cables. The 1- pin is connected
totheground.The1+pinisconnectedtotheoutput
of each channel, which is an industry standard.
You can connect both channel 1 and channel
2 loudspeakers to the Channel 1 output connector.
To do this a quad speaker cable must be used. The
Channel 1 speaker should be connected to pins
1-/1+andtheChannel2loudspeakerisconnectedto
pins2-/2+.
You can use the Channel 1 output connector for
BRIDGEconnectionofyourloudspeakers(whenthe
amplifierisinBRIDGEmode).Inthisconfigurationthe
loudspeakersconnectedmustusethe2+pinofthe
connector for the loudspeaker’s ground connection
(NOTCONNECTEDTOTHEGROUNDOFAMPLI-
FIER)andpin1+forthespeaker’sHOTconnection.
NOTe:Matchthepindesignationsprintednext
to the output connectors on rear panel to ensure
proper connections.
9. CIRCUIT BReAkeR
The circuit breaker protects the amplifier from faults
attheACsupplyandservesasprotectionwhenthe
amplifierfails.Ifthecircuitbreakertrips,cuttingAC
power supply to your amplifier, it may indicate a seri-
ous malfunction or failure. Wait for the circuit breaker
to cool before resetting it by simply pressing the reset
knob. If the circuit breaker repeatedly trips, especially
when there is no signal on the inputs or outputs, this
indicatesafailureofyouramplifier.DISCONNECT
thepowercordfromthewallACoutletimmediately
REAR PANEL CONTROLS (cont.)
12