ETI Sound Systems, INC US-3000 - Manual (Page 12)

THE BEAUTY OF POWER
B-52 US Series Professional Power Amplifiers - Instruction Manual
US SERIES AMPLIFIERS
binding posts offer a variety of connection options.
Use speaker wires with stripped ends (do not strip
them more than ½” or 12.5mm), using the holes on
the bottom of the binding posts. Ensure that no part of
the speaker wire is exposed when connected to the
binding posts. Alternatively, you can also use speaker
cables terminated with standard banana plugs. Make
sure that no part of speaker wire or banana plugs are
exposed when connected to the binding posts.
NOTe: US-Series amplifiers configured for use
in Europe are provided with permanent plastic
inserts which prevent using banana plugs for
speaker connection. This is a safety measure
required by European safety laws.
NOTe: In the BRIDGED mode, the loudspeaker
must be connected using the two red binding
posts. The positive (+) wire from the loudspeaker
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: NEVER CONNECT speakers with
an impedance lower than the rated minimum
impedance of the amplifier. The lowest
impedance in STEREO and PARALLEL modes is
2 Ohms for each channel. The lowest impedance
in BRIDGED mode is 4 Ohms. NEVER
CONNECT 2 Ohms rated loudspeaker(s) or
a combination of speakers to the amplifier in the
BRIDGED mode.
NOTe: Refer to the CONNECTIONS section
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
to the ground. The 1+ pin is connected to the output
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+ and the Channel 2 loudspeaker is connected to
pins 2-/2+.
You can use the Channel 1 output connector for
BRIDGE connection of your loudspeakers (when the
amplifier is in BRIDGE mode). In this configuration the
loudspeakers connected must use the 2+ pin of the
connector for the loudspeaker’s ground connection
(NOT CONNECTED TO THE GROUND OF AMPLI-
FIER) and pin 1+ for the speaker’s HOT connection.
REAR PANEL CONTROLS (cont.)
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