Introduction; General Notes; Features Of The Pt Series Amplifiers; The Pt Series Models - Zeck Audio PT-series Owner's Manual

Zeck PT series
stereo power amplifiers

1. Introduction

1.1 General notes

The term 'PT' stands for Power Transfer, which expresses
exactly what the PT series power amplifiers do: they 'transfer'
a few milliwatts of electrical signal power at the inputs into a
couple of hundred watts at the speaker outputs, without chang-
ing the shape of the signal and adding as little noise or other
spurious signals as possible. We put this signal transfer under
the command of one of the most technical advanced control
systems, including NLR (Non-Linearity Restoration) and TCL
(Temperature Control by Limiting).

1.2 Features of the PT series amplifiers

All PT series power amplifiers are equipped with:
• High efficiency ´flow through´cooling system with
2 proportional temperature controlled fans and large surface
hybrid heatsink.
• LED displays for ready/protect, signal, NLR (distortion limiter)
and TCL (temperature controlled limiter)
• electronically balanced mixed XLR/phone jack input
sockets with parallel XLR outputs for easy setup of
multiple-amplifier systems
• oversized, non-compromise power supply with low-flux
toroidal transformer
• 3 Speakon output connectors for stereo, parallel and bridge
mode
• soft-start anti-surge circuitry for maximum speaker protection
• high-efficiency output stage for lowest possible internal power
dissipation
• protection circuitry against clipping, overtemperature,
mismatched loads, open/short outputs and dc voltage
at output
• distortion-controlled input stage with ultra-fast 100V/µs
internal-loop slew rate
R
owner`s manual PT series © 1995 Zeck Audio
owner's manual PT series
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 PUSH PUSH PUSH PUSH PUSH PUSH 1
PUSH PUSH PUSH PUSH PUSH INPUT PUSH PUSH PUSH PUSH PUSH
1 = SIGNAL GROUND
2 = SIGNAL +
3 = SIGNAL -
2 3 1
MODE
1 + = SIGNAL CH. 1
PARALLEL
1 - = GROUND CH. 1
2 + = SIGNAL CH. 2
2 - = GROUND CH. 2
1
2
DUAL
DIRECT 1 + = SIGNAL CH.2
1 - = GROUND CH. 2
OUT
BRIDGED
1 + = SIGNAL CH.1
1 - = SIGNAL CH.2
2 + = GROUND CH.1
2 - = GROUND CH.2
BRIDGED MONO OPERATION: INPUT SELECTOR SWITCH TO BRIDGED
POSITION. INPUT SIGNAL TO CH. 1 ONLY. CONNECT SPKR TO 1+ AND 1- OF
PT SERIES
BRIDGED OUT CONECTOR. MATCH CH. 1 AND CH. 2 GAINS ON THE FRONT
PANEL AND REGULATE LEVEL WITH BOTH GAIN CONTROLS SIMULTANEOUSLY.

1.3 The PT series models

The PT series amplifiers are available in 4 models:
Model rated output power per channel
into 4 ohms
PT 3 330 W
PT 5 540 W
PT 7 720 W
PT 9 920 W
2
CAUTION
!
RISK OF ELECTRIC SHOCK
DO NOT OPEN
MIN.
2 OHM
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.
SPEAKER OUT
RISQUE DE CHOC ELECTRIQUE. NE PAS OUVRIR.
SERIAL Nr.: 941001AA018
MADE IN BELGIUM
BRIDGED
H A Z A R D O U S E N E R G Y !
MAKE PROPER SPEAKER CONNECTIONS.
MIN. 4 OHM
SEE OPERATING MANUAL.
into 8 ohms
220 W
330 W
450 W
600 W
11