Telex ACM1202P Rear Panel Features, AC Power Inlet, Speaker Output Terminal Strip, Level Control

A M P L IFIE R 2 A M P L IFIE R 1

INPUT AM P 2		INPUT AM P 1
LEVEL 2		LEVEL 1
	X LR
1 =	Ground
2 =	+	Signal
3 =	-	Signal

ENGIN EERED BY AUD IO TELEX C OMM UN IC ATIO N S PTY LTD SYDN EY AUSTRALIA

Rear Panel Features

AC Power Inlet

The 3 pin IEC power inlet is located on the bottom left of the rear panel and accepts a standard mains power lead fitted with an IEC connector. Before plugging in a power lead, please check the rear panel of the amplifier to ensure that the voltage label shows the correct AC operating voltage for your part of the world.

The inlet is equipped with an in-built AC fuse holder fitted with a 6 Amp slow blow fuse plus a spare fuse. Please ensure that the mains power cord is disconnected before attempting to check or replace this fuse. Power consumption is 400 watts (max).

Speaker Output Terminal Strip

Located on the top left of the rear panel are the speaker output terminal strips. A terminal strip is provided for each of the two amplifiers. Reading from left to right, the connections per terminal strip are:

COM Common or “-” for low impedance speaker loads (4 or 8 ohms).

4The “+” for 4 ohm speaker loads (use with common)

8The “+” for 8 ohm speaker loads (use with common)

COM Common or “-” for 70v or 100v speaker loads (maximum load of 80 ohms at 100v)

70The “+” for 70v line speaker loads (use with common)

100The “+” for 100v line speaker loads (use with common)

Please ensure that the correct “Common” is used. Low impedance and 70/100v loads can be used simultaneously but please pay careful attention to the overall speaker load. When used individually, the low impedance load should be 4 ohms or higher while the 100v line load should not fall below 80 ohms per amplifier. When both low impedance and 70/ 100v outputs are used simultaneously on the one amplifier, ensure that neither output is loaded to maximum.

Level Control

Located next to the XLR input/output is a recessed screwdriver adjustable level control. One is provided per amplifier channel. The level control is an input attenuation control normally used to match the amplifier to a wide variety of input signals. In essence, the amplifier is designed to receive a 700mv input signal however the level control can be used to increase the level for lower signals or decrease the level for higher input signals. In normal use, the level control is used as a ‘set and forget’ master level control for the amplifier.

XLR Audio Input and Parallel Output

The ACM1202P includes both male and female 3 pin XLR connectors per channel. While the female is normally used as the input to the amplifier, both XLR’s are connected in parallel so either will work. When signal is connected to one XLR, the other XLR becomes a line level output allowing the input signal to be distributed (split) to other amplifiers. In some projects, the same input may be looped through to multiple amplifiers using this method. Up to 6 amplifiers can be looped together without any noticeable loss in level. A distribution amplifier should be used when more than 6 amplifiers need to be looped.

The XLR’s are wired as follows: Pin 1: Shield. Pin 2: Hot, +, Positive. Pin 3: Cold, -, Negative