Classe CA-M400 Manual De Instrucciones página 14

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For this reason, we strongly recommend using the balanced analog
interconnections between your Classé components wherever possible.
The pin assignments of these XLR input connectors are:
Pin 1: Signal ground
Pin 2: Signal + (non-inverting)
Pin 3: Signal – (inverting)
Connector ground lug: chassis ground
These pin assignments are consistent with the standard adopted by the
Audio Engineering Society (AES14-1992).
If you are using your Classé power amplifier with a Classé preamplifier,
you're all set – just take standard balanced interconnect cables and plug
them in.Then engage that input on the power amplifier by configuring it
as described in Initial Setup.
If you are using another brand of preamplifier, please refer to the operating
manual of your balanced-output preamplifier to verify that the pin
assignments of its output connectors correspond to those of your amplifier.
If not, have your dealer wire the cables so that the appropriate output pin
connects to the equivalent input pin.
2 Single-Ended (RCA) Input
Single-ended cables using RCA connectors are the most common form
of analog connection used in consumer electronics. When implemented
carefully and with use of high quality interconnecting cables, this standard
can provide excellent performance. Classé has gone to extraordinary effort
to ensure that the single-ended (RCA) input of your power amplifier is
as good as possible. However, this connection standard cannot offer the
immunity from interference that balanced interconnection does—hence
our recommendation to use the balanced inputs when possible.
If you elect to use the single-ended input of your Classé power amplifier,
you need to engage it by configuring the amplifier as described in the
section Initial Setup.
3 Speaker Outputs
Two pairs of high quality five-way binding posts are provided on the
amplifier, in order to facilitate bi-wiring.
In practice, bi-wiring involves connecting two (preferably identical) sets
of speaker cables between each amplifier channel and its corresponding
loudspeaker. In many cases, the benefit is a subjectively improved level of
clarity and detail from the speaker, as a result of being able to feed the two
separate sections of its crossover and driver complement with identical, yet
separate signals.