Setting Up The Amplifier; Installation; Mode Switch; Connections - Zeck PT Série Mode D'emploi

PT series owner's manual
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PUSH PUSH PUSH PUSH PUSH PUSH PUSH PUSH PUSH PUSH PUSH PUSH PUSH PUSH PUSH PUSH PUSH PUSH PUSH PUSH PUSH PUSH PUSH PUSH
PUSH PUSH PUSH PUSH PUSH PUSH PUSH PUSH PUSH PUSH
INPUT
MODE
PARALLEL
3
1
2
1
DUAL
DIRECT
OUT
BRIDGED
7
BRIDGED MONO OPERATION: INPUT SELECTOR SWITCH TO BRIDGED
POSITION. INPUT SIGNAL TO CH. 1 ONLY. CONNECT SPKR TO 1+ AND 1- OF
BRIDGED OUT CONECTOR. MATCH CH. 1 AND CH. 2 GAINS ON THE FRONT
PANEL AND REGULATE LEVEL WITH BOTH GAIN CONTROLS SIMULTANEOUSLY.

2. Setting up the amplifier

2.1 Installation

The PT series amplifiers are equipped with two cooling fans
with rear-to-front airflow. When installing the amplifier, allow for
ample space behind the amplifier to ensure sufficient airflow,
especially when the amplifier is operated inside a rack system.
This helps the amplifier to get rid of its dissipation heat and
avoids limiting or shut-off through the thermal TCL protection
circuit.

2.2 Mode switch

Before making any connections, you have to decide in which
mode you want to use your PT amplifier. All PT series ampli-
fiers are able to work in three operational modes which can be
selected by the mode switch (1) on the back panel:
• DUAL mode: in this mode both channels and their
corresponding in- and outputs work totally independent from
each other. This is the mode for normal stereo (two-channel)
operation.
• PARALLEL (MONO) mode: in this mode, both inputs of the
PT amplifier are internally connected in parallel. Using
the input 1 gives identical signals on both SPEAKER OUT 1
and 2 outputs (4 + 5) with the possibility of individual volume
control.
Warning: this mode does not mean that the outputs of
both channels are wired in parallel nor should you ever
attempt to wire them together!
• BRIDGE mode: the monaural bridge mode allows to use the
amplifier's full output power capacity for one single monaural
channel. (see Chapter 5 for details).
This configuration is recommended to produce high power for
a monaural speaker system, e.g. bass subwoofers. In addi-
tion to that, any PT amplifier working in BRIDGE mode can
be directly connected to a 100V-line (70V-line) constant
voltage sound system.
12
1 2
1 = SIGNAL GROUND
2 = SIGNAL +
3 = SIGNAL -
2 3 1
MIN.
2 OHM
1 + = SIGNAL CH. 1
1 - = GROUND CH. 1
2 + = SIGNAL CH. 2
2 - = GROUND CH. 2
SPEAKER OUT
1 + = SIGNAL CH.2
4
1 - = GROUND CH. 2
1 + = SIGNAL CH.1
1 - = SIGNAL CH.2
2 + = GROUND CH.1
2 - = GROUND CH.2
BRIDGED
PT SERIES
MIN. 4 OHM

2.3 Connections

All input and output sockets are located on the rear panel of the
amplifier. The rear panel also holds the mains cord (2) and the
mode switch (1). For maximum safety, it is recommended to
stick to the order given below when wiring the PA system.The
Zeck company holds no responssibility for any damage that
occured to other audio components connected to the PT ampli-
fier.

2.3.1 Input connections

The input sockets (3) are mixed XLR / phone jack receptacles,
which allows to use microphone or instrument cables to
connect to the amplifier to the mixer. Whenever possible, use
2-conductor microphone cables for a balanced signal transmis-
sion, which gives best sound results and lowest noise. The
inputs are wired in standard configuration with pin 1 as signal
ground, pin 2 as signal "hot" and pin 3 as signal "cold". You
may also refer to the input wiring diagram on the amplifier's
back panel. Two 'Direct Out' male XLR sockets (7) next to the
input sockets are wired parallel to the inputs and provide easy
connection to other amplifiers.
DUAL mode: connect each channel input to the appropriate
output of the preceding audio device.
PARALLEL mode: use only input 1 of the PT amplifier to
obtain identical signals on both speaker outputs 1 and 2. The
output levels can be adjusted indvidually by means of their cor-
r e s p o n ding volume controls.
BRIDGE mode: use only input 1. Both volume controls must
be used simultaneously for output level control. Under any cir-
cumstances, keep both volume controls at the same value.

2.3.2 Speaker connections

Warning: all PT series amplifiers are capable of producing dan-
gerously high voltages at their outputs! To avoid cable over-
heating, do not use speaker cables under 2 x 1.5 mm
section (AWG 15) for any power amplifier. The use of thicker
cables also helps to keep the power loss down, especially if
long speaker distances have to be bridged. After insertion,
make sure that every Speakon connector has been twisted
clockwise before locking it with the swivel nut to ensure proper
contact.
CAUTION
RISK OF ELECTRIC SHOCK
DO NOT OPEN
THIS APPARATUS MUST BE EARTHED. TO REDUCE THE
RISK OF FIRE OR ELECTRIC SHOCK DO NOT EXPOSE
THIS APLLIANCE TO RAIN OR MOISTURE.
NO USER SERVICEABLE PARTS INSIDE.
REFER SERVICING TO QUALIFIED PERSONNEL.
RISQUE DE CHOC ELECTRIQUE. NE PAS OUVRIR.
5
SERIAL
Nr.: 941001AA018
MADE IN BELGIUM
6
H A Z A R D O U S E N E R G Y !
MAKE PROPER SPEAKER CONNECTIONS.
SEE OPERATING MANUAL.
owner`s manual PT series © 1995 Zeck Audio
!
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