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4. Rear panel features
3
1
1) IEC power connector – Input power supply 230V AC.
2) Breaker – Overcurrent protection.
3) FANS – Forced ventilation turbines. Do not cover.
4) XLR Input A – Electronically balanced for channel A.
5) XLR Link A – Signal link of the A channel (for another amplifier).
6) XLR Input B – Electronically balanced for channel B.
7) XLR Link B – Signal link of the B channel (for another amplifier).
8) Mode selection – Switch: Stereo, Bridge and Parallel mode.
5. Connection to the mains
First, it is essential to ensure that the main voltage corresponds to
the apparatus voltage. It is not advisable to connect and disconnect the
mains wire without first making sure that the switch is in its OFF position.
The amplifier is equipped with an Inrush current limiter circuit,
which avoids current excess when powering up. In addition to that, a
breaker switch located close to the IEC socket protects the amplifier
when the average current consumption is out of the specified range.
6. Connection of the loudspeakers
The loudspeaker system should be connected to the Speakon or
binding posts connectors ensuring that the polarity is correct. It is
very important to use a cable fitting to the power of the amplifier in
order to maintain the high damping factor these units provide.
As a general guideline, we offer a table showing the recommend-
ed cable section for different cable length, in order to keep power and
damping factor loss in acceptable values.
Max. recommended cable length
Cable Section
8 Ohm Load
2.5mm2 (AWG14)
20 m
4mm2 (AWG12)
30 m
6mm2 (AWG10)
40 m
8 mm2 (AWG 8)
50 m
There are two speaker outputs: CH A and CH B both fitted with
Speakon sockets and Terminal type (binding posts) connectors.
4
2
11
10
4 Ohm Load
10 m
15 m
20 m
25 m
8
9
9) Speakon Output A – Loudspeaker output A connection via 2-pole
Speakon (+1 -1) or loudspeaker output A+B (A: +1 -1; B: +2 -2) connection
via 4-pole Speakon.
10) Binding Posts – Separate outputs of each channel. This connector
is connected in parallel with the Speakon Output and they are recom-
mended when requiring separate ways or a wire section greater that the
Speakon Output.
11) Speakon Output B – Loudspeaker output B connection via 2-pole
Speakon (+1 -1).
AC 220/240 V – 50/60 Hz
AVERAGE CURRENT DRAW
CAUTION: the connection to any other
voltage different from the one specified can
damage the amplifier immediately.
The Speakon connector (not included) has 4 terminal poles labeled
as +1, -1, +2 and -2. Each pole can fit a maximum wire section of 4mm
(12AWG). In mobile applications this connection may also be soldered to
guarantee better contact.
The Binding Posts are marked with Red for the Positive Pole, and
Black for the Negative Pole. They accept direct cable connection up to
8mm
2
section (8AWG).
The outputs are configured as following for the STEREO and PAR-
ALLEL amplifier modes:
Output
Speakon A
+ Ch A
- Ch A
+ Ch B
2 + (*)
- Ch B
For BRIDGE mode, the following output connection is needed:
Output
Speakon A
+ Pole
- Pole
(*) Although it is possible to get the output of both channels with the
same connector (Speakon A) when not strictly necessary, it is recom-
mended whenever possible to use one Speakon connector for each out-
put (Speakon A for CHA, Speakon B for CHB). With only two active pins
+1 y -1 to avoid undesired signal crosses between positive pins that can
damage the amplifier.
4
5
6
7
3 A at
1
/
power
8
6 A at
/
power
1
3
Speakon B
1 +
N.C.
1 -
N.C.
1 +
2 - (*)
1 -
Speakon B
1 +
N.C.
2 +
N.C.
User's Manual /
Manual de usuario
3
2
Binding Post
Red (A)
Black (A)
Red (B)
Black (B)
Binding Post
Red (A)
Red (B)
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