Australian monitor DCM120 User Manual

DCM120

120W AC/DC Power Amplifier

Description

The DCM120 is a high performance 120 watt power amplifier designed to meet the needs of

the most demanding sound reinforcement installations and applications. The amplifier is

designed to operate from both AC mains power as well as 24 volts DC.

Inputs and Outputs

The DCM120 features a transformer balanced line level XLR input with a parallel output to

feed additional amplifiers. The DCM120 provides 100 volt, 70 volt and 4 & 8 ohm speaker out-

puts via a rear panel barrier strip.

Controls and Metering

The front panel consists of a mains power switch and a recessed, screwdriver adjustable input

attenuation control. The front panel of the DCM120 includes a back-lit LED display indicating

power, high temperature, LED VU meter and mains fail indication. The mains fail indicator will

only operate in the event of a mains power failure and when the amplifier is connected to a

24V DC power supply.

Protection

The DCM120 features overload and overdrive protection. Should the amplifier be overdriven,

a current limiter will protect the unit, and in a worst case scenario the amplifier will shut down

until the problem is resolved. Once the problem is fixed (shorted speaker line, or overdriven

input), the amplifier will automatically reset and continue operation. The amplifier also features

a built-in compressor/limiter designed to smooth out any peaks in input signal. The DCM120

features generous heatsinking and fan cooling. The fan will only switch on if the operating tem-

perature exceeds a factory preset level.

Australian Monitor Installation Series amplifiers feature a protection network that provides

greater stability and performance. Our amplifiers are recognised

worldwide for their reliability and this is due to the extensive levels of

current limiting which protect the amplifiers from both overload and

overdrive conditions.

Other Features

The DCM120 can operate from both AC and 24V DC and includes a built-in trickle charge

circuit.

Power Output 120 Watts RMS into 100 & 70 Volt line, 4 & 8 Ohms

Maximum Load 80 Ohms @ 100V

Frequency Response 50Hz - 15kHz (± 3dB) into 100V

Total Harmonic Distortion Less than 0.5% @ 1kHz; Distortion at Max Power: 0.7%

Signal To Noise Ratio -82dB

Input Sensitivity Max 300mV (set @ 1V)

Input Impedance 10K Ohms

Input Connection Transformer Balanced input with male and female XLR input/output sockets

Outputs 100 & 70 Volts, 4 & 8 Ohm speaker outputs via a rear panel barrier strip. Line out

to feed additional power amplifiers available from one of the paralleled XLR inputs

Controls Front Panel Power Switch, Recessed front panel input attenuator

Metering/Indicators Amplifier Status Display Window including: Power On LED;

10 segment LED output meter; Mains fail LED; High temp trip LED

Power Sources AC: 240V - 50Hz or 110V - 60Hz (special order), 3 pin IEC connector;

DC: 24V with built in trickle charge circuit: 300ma maximum trickle charge.

8 Amp maximum current draw on DC 300ma standby (idle) current draw on DC

Power Consumption 300 Watts (maximum)

Protection Internal Cooling Fan with temperature sensor

Compressor/Limiter Current Limiter with auto protect and auto reset

Dimensions/Weight 88mm H x 483mm W x 310mm D (Chassis dimensions only). 12 kg

ARCHITECTURAL AND ENGINEERING SPECIFICATIONS

The power amplifier shall be of high quality, suitable for the most demanding PA installations and appli-

cations. The unit shall have a frequency response of no less than 50Hz - 15kHz (±3dB). Distortion at

1kHz shall not exceed 0.5%. The Signal to Noise ratio shall be -82dB or greater. The amplifier shall have

two transformer balanced XLR inputs, one of which can be used to feed additional power amplifiers.

The amplifier shall be capable of delivering 120 watts RMS into 100 & 70 volt or 4 & 8 ohm loads.

Speaker connection shall be via a rear panel barrier strip.

The unit shall operate from both AC mains power or from a 24V DC battery supply. The amplifier shall

include a built-in trickle charge circuit. The amplifier shall feature overload and overdrive protection and

shall also include cooling fans, which should only be active if the operating temperature exceeds a fac-

tory preset level.

The unit shall be packaged in a rugged 2 RU metal chassis suitable for desk or rack mounting.

The power amplifier shall be an Australian Monitor Installation Series model DCM120.

Engineered and Distributed By AUDIO TELEX COMMUNICATIONS PTY LTD (

NSW Tel: [phone] Fax: [phone] VIC Tel: [phone] Fax: [phone] QLD Tel: [phone] Fax: [phone] WA Tel: [phone] Fax: [phone]

TAS Tel: [phone] Fax: [phone] SA Tel: [phone] Fax: [phone] Export Enquiries: [e-mail]

ABN 78 001 345 482), 149 Beaconsfield Street, Silverwater, Sydney, NSW, 2128 Australia

Website: www.australianmonitor.com.au