Rear Panel Features; Connection To The Mains; Connection Of The Loudspeakers - Master audio HD Serie Manual De Usuario

4. Rear panel features

- Forced ventilation turbine (8)
- 230V power supply (1)
- Automatic Breaker (2)
8 1

5. Connection to the mains

First, it is essential to ensure that the main voltage corre-
sponds to the apparatus voltage. It is not advisable to con-
nect 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 Terminal 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 of the minimum cross
section values according to the distance:
- Up to 20m in length: cross section of minimum 2.5mm
(14AWG)
- From that length on, increase the section to 4 mm
(12AWG).
These cross-sections correspond to imped-
ance of 8 Ohms; they should be increased
for impedance of 4 Ohms. If you use very
low load (2 Ohm) the cross section has a
very important role in the sound quality.
There are two speaker outputs: CH A and CH B both fitted with
Speakon sockets and Terminal type (binding posts) connectors.
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 connec-
2
2 4
3
2
- XLR input signal connectors (6) & Link (7)
- Loudspeaker output connection. Speakon (3) and Terminals (4)
- Mode Selection Switch. Stereo, Bridge and Parallel (5)
3
CAUTION: the connection to any other
voltage different from the one specified
can damage the amplifier immediately.
tion 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 con-
nection up to 8mm
The outputs are configured as following for the STEREO and
PARALLEL amplifier modes:
2
minimum
Output
+ Ch A
- Ch A
+ Ch B
- Ch B
For BRIDGE mode, the following output connection is needed:
Output
+ Pole
- Pole
(*) Although it is possible to get the output of both channels
with the same connector (Speakon A) when not strictly neces-
sary, it is recommended whenever possible to use one Speakon
connector for each output (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.
5 6 7
6
7
section (8AWG).
2
Speakon A
Speakon B
1 +
N.C.
1 -
N.C.
2 + (*)
1 +
2 - (*)
1 -
Speakon B
Speakon A
N.C.
1 +
N.C.
2 +
8
Binding Post
Red (A)
Black (A)
Red (B)
Black (B)
Binding Post
Red (A)
Red (B)