Redback A 4031C User manual

3Australian made
310 year manufacturer warranty with local product support
33 Inputs suitable for either microphone or line level, or for use as
microphone and line level coupled together
3Bass and treble controls (on both microphone and auxiliary inputs)
3Full 30W RMS output (100V and 4 -16Ωoutputs)
3Push to talk muting
3Protection against over-voltage, over current, thermal run-away and
short circuit load
3Internationally accepted IEC mains socket (240V AC operation only)
3Stereo RCA sockets for all auxiliary inputs (configured to mono inter-
nally allowing standard stereo equipment to be directly connected)
3Fully balanced microphone inputs
3Tape output, suitable for recording, or for connection to a second
amplifier
Product Guide
A 4031C 30W 100V Public Address Amplifier
A 4031C 30W 100V Public Address Amplifier
Redback®Public Address Products
This PA amplifier has been designed to meet the requirements of
small to medium sized professional public address installations.
Features such as push to talk (PTT) auxiliary muting, three
combined balanced line microphone / stereo line inputs, tape out,
and separate bass and treble controls give this amplifier a wide
scope of installation applications, including schools, public halls,
workshops and sporting complexes. This unit features thermal
overload shutdown, over current and short circuit protection.
High Performance
Frequency response extends from 40Hz to 10kHz at a total
harmonic distortion (THD) of less than 0.5%. Output may be 100V
line or low impedance (8 - 16Ω) speaker loads.
VOX Muting Functionality
The VOX circuit allows telephone paging via line input one or two
(selectable internally). When paging via the telephone, all other
line inputs are muted (ie. background music). Features variable
sensitivity and time delay settings.
Redback®products are proudly designed, engineered and
manufactured in Australia.
Each unit is covered by a comprehensive 10 year parts and labour
warranty. Redback®offers rock solid reliability from over 40 years
experience in the commercial sound industry. Redback®offer locally
available servicing and parts, plus the ability to offer feedback direct to
the manufacturer.
Overview
About Redback®Public Address Products
Key Features
®
1

Rear Panel
Product Guide
A 4031C 30W 100V Public Address Amplifier
Redback®Public Address Products
®
2
1
1 240V AC input
2 100V line terminals
38-16Ωterminals
4RCA stereo tape output
5RCA stereo line (input 3)
6RCA stereo line (input 2)
7RCA stereo line (input 1)
8XLR 3 pin balanced (input 3)
9XLR 3 pin balanced (input 2)
10 XLR 3 pin balanced (input 1)
11 DIN 5 pin unbalanced (input 1)
12 6.35mm jack unbalanced (input 1)
2 3 4 5 6 7 8 9 10 11 12
Specifications
Electrical
Power Output: 30 watts RMS
Distortion: < 0.5% @ 1kHz
Output Line: 100V or 8 - 16Ω
Signal to Noise Ratio: Typically 75dB below rated output
Frequency response mic: 52Hz - 10kHz, -3dB
Frequency response mic: 40Hz - 10kHz, -3dB
Mic 1 sensitivity: 2.6mV balanced or 3.2mV unbalanced
Mic 2 & 3 sensitivity: 2.6mV balanced
Line inputs sensitivity: 150mV
240V ac power: IEC power connector
Power supply: 240V AC
Protection: 800mA AC, 3A x 2 DC internal
Muting: PTT and VOX via microphone (-79dB)
Indicators: Power
Controls
Volume 1: Controls mic 1 / line 1
Volume 2: Controls mic 2 / line 2
Volume 3: Controls mic 3 / line 3
Bass: ±10dB @ 100Hz
Treble: ±13dB @ 10kHz
Mechanical
Dimensions: 300W x 220D x 74H mm
Weight: ≈4.8kg
Connections
Inputs
Mic 1 Mic 2 & 3 Line 1, 2 & 3
6.35mm (unbalanced)
5 pin DIN (unbalanced)
3 pin XLR fem. (balanced)
3 pin XLR fem.
(balanced) Stereo RCA
Notes: The 5 pin din has facility for PTT (push to talk) muting. The PTT
contacts will mute input 2 (mic 2 and aux 2) and input 3 (mic 3 and aux 3).
The PTT contacts will not mute Aux 1 input. We recommend that you connect
only one microphone at a time to input 1.
Outputs
Speakers Tape Out
Screw terminals for 100V line
and 8-16ΩStereo RCA
Notes: Minimum impedance for 100V loads is 333Ω(when only the 100V
output is used). We do not recommend using this amplifier with a combination
of low impedance and 100V line speakers.
The amplifier shall have a power output of 30 watts RMS. The unit shall have 3 inputs,
each input consisting of one balanced XLR microphone input and dual RCA line input. In
addition, microphone 1 input shall have a 5 pin DIN balanced input and a 6.35mm jack
unbalanced input. Frequency response shall be 52Hz – 10kHz (-3dB) for microphone
inputs and 40Hz – 10 kHz (- 3dB) for line inputs.
The unit shall have separate volume controls for each microphone / line input and tone
controls providing 10dB cut or boost at 100Hz and 13dB cut or boost at 10kHz.
The unit shall operate from 240V AC with a LED indicator, and be fuse protected. The unit
shall have overload protection via DC fuses.
The amplifier shall be capable of delivering full power of 100V RMS into a 333 ohm (30W)
inductive load with less than 0.5% distortion measured at 1 kHz and with system hum and
noise typically -72dB with all volume controls at minimum. The speaker outputs shall be
100V and 8 ohms provided via screw terminals.
The amplifier shall be a REDBACK model A 4031C.
Architect Specifications