TOA A-1803 mixer amplifier

Toa A1803 100V line mixer amplifier

Toa A1803 powered mixer is a basic mono/2 zones 30 Watts (100V) PA amplifier with 3 mic channels suited for broadcasting, paging or background music in schools, offices or shops.

Toa A-1800 series

A-1800 series of mixer power amplifiers comprises A-1803 30 Watts, A-1806 60 Watts and A-1812 120Watts.

Features

Versatility plus: The A-1800 Series amplifiers are distinctive for their input versatility. Each has three mic inputs, three auxiliary inputs, an emergency input as well as a telephone paging input. Paging can be initiated and the chime function can also be set to automatically output to two zones.

Each A-1700 Series amplifier has 2 speaker output zones which can be independently selected or used together for enhanced PA applications.

2 Zone Capability: A-1800 Series amplifiers feature 2 speaker zones to which broadcasts can be sent independently or combined as desired. Emergency broadcasts will be heard in both zones. Even when the amplifier power is switched off, an emergency broadcast will be initiated to both zones.

Phantom Power Provided: The A-1800 Series of amplifiers provide phantom power to all connected microphones. Phantom power can be switched on or off as needed. The microphone inputs feature a balanced configuration with XLR connectors, allowing long cable runs without any problems.

For more sophisticated equalization such as minimizing feedback, a parametric equalizer or other gearcan be patched in before the power amplification stage. Other equipment such as a delay unit can also be connected if required. Alternately, to extend sound coverage, and additional power is needed to power other speakers, the line out terminal can be used to send the mix output to another power amplifier.

Chime on input: The Mic 1 input incorporates chime on capability when the optional PM-660D Paging Microphone is used. Chime on can also be activated for the telephone paging. A selection of chime tones are available such as single, two-tone and four-tones which can either be in ascending or descending order.

Equalization: Each amplifier allows easy tonal adjustment of all output signals with bass and treble controls.

Line output: A line output is useful for adding more power in a particular zone by providing the input signal for a booster amplifier such as the P-1812.

Remote control: In an expanded system with the P-1812 amplifier, an emergency will activate the P-1812, even if had not be switched on to enable the broadcast.

Record Output: The back panel includes a record output for connecting an external recorder to archive or back up broadcasts.
Input priority override and muting

Each input can be set for priority override as well as mute. This facilitates making emergency announcements and messages as well as paging. Priority is in order starting with emergency, telephone paging, Mic 1* input.

* Mic 1 has priority by default unless switched or when the optional PM-660D Paging Microphone is used. Priority will also automatically decrease the levels of other inputs.

Dual power supply: A-1800 Series amplifiers can conveniently be operated on AC or on DC24V to suit installation requirements.
Music On Hold (MOH) output-equipped. For adding convenient music or messages when telephone call waiting, music from a CD or cassette player connected to the Aux 1 input will activate MOH to fill the silence.

Specification

Power Source AC mains 50/60Hz, or 24V DC (M4 screw terminal)
Rated Output A-1803: 30W A-1806: 60W A-1812: 120W
Power/ Current Consumption A-1803: AC operation: 80W (rated output), 37W (EN60065)
24V DC operation: 2.0A (rated output), 1.0A (EN60065)
A-1806: AC operation: 158W (rated output), 66W (EN60065)
24V DC operation: 3.8A (rated output), 1.6A (EN60065)
A-1812: AC operation: 260W (rated output), 110W (EN60065)
24V DC operation: 7.0A (rated output), 2.8A (EN60065)
Frequency Response 50 - 20,000Hz (¡Þ3dB)
Distortion Under 2% at 1kHz, rated power
Input MIC 1: -60dB*1, 600O, electronically-balanced, combined type of XLR-3-31 equivalent and phone jack, DIN socket (5 pins)
MIC 2-3: -60dB*1, 600O, electronically-balanced, combined type of XLR-3-31 equivalent and phone jack
AUX 1(MOH): -20dB*1, 10kO, unbalanced, RCA pin jack
AUX 2: -20dB*1, 10kO, unbalanced, RCA pin jack
AUX 3: -20dB*1, 10kO, unbalanced, combined type of XLR-3-31 and phone jack
TEL*2: -20dB*1, 10kO, electronically-balanced, M3 screw terminal
EMERGENCY: 0dB*1, 600O, unbalanced, M3 screw terminal
Output A-1803:REC: 0dB*1, 600O, unbalanced, RCA pin jack
LINE 1, 2*3: 0dB*1, 600O, unbalanced, RCA pin jack
MOH: 0dB*1, 600O, transformer balanced, M3 screw terminal
Speaker selector: 2 zone, high impedance (100V line/330O), individual selector switch, M4 screw terminal
Direct speaker out: High impedance (100V line/330O), M4 screw terminal Low impedance (4 - 16O), M4 screw terminal
(Both Low and High impedance terminals cannot be used at the same time.)
A-1806: REC: 0dB*1, 600O, unbalanced, RCA pin jack
LINE 1, 2*3: 0dB*1, 600O, unbalanced, RCA pin jack
MOH: 0dB*1, 600O, transformer balanced, M3 screw terminal
Speaker selector: 2 zone, high impedance (100V line/167O), individual selector switch, M4 screw terminal
Direct speaker out: High impedance (100V line/167O), M4 screw terminal Low impedance (4 - 16O), M4 screw terminal
(Both Low and High impedance terminals cannot be used at the same time.)
A-1812:REC: 0dB*1, 600O, unbalanced, RCA pin jack
LINE 1, 2*3: 0dB*1, 600O, unbalanced, RCA pin jack
MOH: 0dB*1, 600O, transformer balanced, M3 screw terminal
Speaker selector: 2 zone, high impedance (100V line/83O), individual selector switch, M4 screw terminal
Direct speaker out: High impedance (100V line/83O), M4 screw terminal Low impedance (4 - 16O), M4 screw terminal
(Both Low and High impedance terminals cannot be used at the same time.)
Phantom Power ON or OFF for each MIC 1 - 3 with switch setting
S/N ratio (Band Pass:
20 ? 20,000Hz) Over 100dB (Master volume: min)
Over 76dB (Master volume: max)
Over 60dB (MIC 1 - MIC 3)
Over 76dB (AUX 1 - AUX 3)
Over 90dB (TEL)
Over 96dB (EMERGENCY)
Tone Control Bass: ¡Þ10dB at 100Hz, Treble: ¡Þ10dB at 10kHz
Control Input TEL: No-voltage make contact input, short-circuit: under 5mA, M3 screw terminal
EMERGENCY*4: No-voltage make contact input, short-circuit: under 10mA, M3 screw terminal
Control Output Power remote: Open collector output, withstand voltage: 35V DC, control current: under 50mA, M3 screw terminal
Chime 1-tone, 2-tone, or ascending 4-tone chime, or None selectable with switch setting, activated at MIC 1's DIN or CONTROL TEL terminal
Indicator 5 point LED output level meter,
Power indicator LED,
Zone indicator LED,
Emergency LED,
TEL LED
Priority EMERGENCY: Overrides other inputs TEL: Overrides other inputs except EMERGENCY, ON/OFF selectable with switch setting MIC 1: Overrides other inputs except EMERGENCY & TEL, ON/OFF selectable with switch setting
Operating Temperature -10°C to +40°C
Finish Panel: ABS resin, black, hair line
Case: Steel plate, black
Dimensions (W × H × D) 420 × 107.7 × 367mm
Weight A-18036: 8.1kg A-1806: 9.4kg A-1812: 12.6kg
Accessory
Power cord × 1,
Terminal block cover × 1,
Terminal block cover mounting screw × 2
Option Rack mounting bracket: MB-25B,
Volume control cover: YA-920
Input transformer: IT-453A

Note: Distance between barriers on the above screw terminals: M3 = 7mm, M4 = 9mm
*1 0dB = 1V
*2 Can be transformer-balanced with the addition of optional IT-453A input transformer.
*3 LINE 1 and LINE 2 outputs can be interlocked with ZONE 1 and ZONE 2 speaker selectors, respectively. (This function needs internal modification.)
*4 Operation when activated can be selected from the following: Turning ON the unit's power (factory-preset) or OFF. (The OFF function needs internal modification.)

Specific accessories	Price ex. VAT

Page last updated:  Thursday 24 July 2008

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