ETI Sound Systems, INC US-1200 Stereo Amplifier User Manual


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B-52 US Series Professional Power Amplifiers - Instruction Manual
THE BEAUTY OF POWER
US SERIES AMPLIFIERS
5. LIMITER switch (US-3000 and
US-4000 models only)
When the sound source signal is too high, the out-
put signal will distort. To prevent this, both channels
feature clip limiters to prevent gross distortions on the
outputs. It is recommended to avoid clipping but if
it does occur, the clip limiters will greatly reduce the
amount of distortion and stress on your speakers and
amplifier. It is recommended to keep these switches in
theONpositionasthiswillresultinbettersoundand
increase the life of your loudspeakers.
NOTE: The US-1200 and US-1800 amplifiers
have built-in limiters that are permanently
engaged for constant protection and optimal
performance.
6. BRIDGE / STEREO / PARALLEL SWITCH
Use this switch to change the amplifier’s operating
modetoSTEREO,BRIDGEDMONOorPARALLEL
MONO.SetthisswitchtotheSTEREOpositionfor
normal stereo, or 2-channel operation.
WhensettoPARALLEL,theinputsignalconnectedto
channel1isroutedtobothchannels.ThePARALLEL
MONOmodeisconvenientwhenrunningalong
mono signal cable to a remote power amplifier(s),
and then connecting speakers to both of the channels
inordertoreproducethesamesignal.InPARALLEL
mode the input of channel 2 is inactive and should
not be used in this configuration.
IntheBRIDGEDposition,themonoinputsignalcon-
nected to channel 1 is routed to both the right and
left amplifier channels, yet in this mode the speaker is
connected between the two channels’ hot outputs and
is not referenced to the ground. In this mode the chan-
nel 2 input is inactive.
NOTE:SeetheCONNECTIONSsectionlaterin
thismanualformoredetailsonPARALLEL
MONOandBRIDGEDMONOmodes.
WARNING:DONOTswitchtoPARALLEL
MONOorBRIDGEDMONOunlessyouhave
read and understood these connections and their
limitations as described later in this manual.
7. BINDING POST OUTPUTS
Use the binding posts to connect your loudspeakers
to the amplifier. Binding posts are a good option for
xedinstallationsorwhenyoudonothaveSpeakon-
fitted speaker cables. The high-quality insulated
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