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
fixed installations or when you do not have Speakon-
fitted speaker cables. The high-quality insulated
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