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Compact Half Rack 100V PA Amplifiers
Operating Manual
A 4218 1 x 60W
A 4219 2 x 60W
A 4220 1 x 120W
A 4221 2 x 120W
A 4222 1 x 240W
A 4223 2 x 240W
A 4224 1 x 480W
A 4225 2 x 480W
Distributed by Altronic Distributors Pty. Ltd.
Phone: 08 9428 2199
Internet: altronics.com.au
IMPORTANT NOTE:
Please read these instructions carefully from front to back prior to installation.
They include important setup instructions. Failure to follow these instructions may prevent the
unit from working as designed.
User manual revision number: 1.0 22/1/25
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Summary of Contents for Redback A 4218
- Page 1 Compact Half Rack 100V PA Amplifiers Operating Manual A 4218 1 x 60W A 4219 2 x 60W A 4220 1 x 120W A 4221 2 x 120W A 4222 1 x 240W A 4223 2 x 240W A 4224 1 x 480W A 4225 2 x 480W Distributed by Altronic Distributors Pty.
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Page 2: Important Safety Instructions
Power Supply Vo Power Consumpt Speaker Output Frequency Respo S/N Ratio T.H.D Compact Half Rack 100V PA Amplifiers Working Humidity Output Channel Tone Controls IMPORTANT SAFETY INSTRUCTIONS Working Tempera Product Dimensi Net Weight Read these instructions prior to use and retain these Only use attachments and accessories specified by the instructions for future reference. -
Page 3: Unpacking And Installation
Compact Half Rack 100V PA Amplifiers INTRODUCTION Thank you for purchasing this Redback compact half rack PA amplifier. This amplifier has been designed with multi zone systems in mind, offering the ability to mix and match different zone amplifier power ratings and channel configurations within a single unit of 19” rack space. -
Page 4: Front Panel
Compact Half Rack 100V PA Amplifiers FRONT PANEL INPUT 1 volume: Adjusts input 1 volume. LOW tone control (BASS): Adjusts the low frequency, 100Hz +/-10dB. HIGH tone control (TREBLE): Adjusts the high frequency, 10kHz +/- 10dB. SIGNAL indicator: Turned on when output signal is present. PROTECTION indicator: Turned on when the amplifier goes into protection mode by over current or over temperature. -
Page 5: Rear Panel
Compact Half Rack 100V PA Amplifiers REAR PANEL PARALLEL OUTPUT2 OUTPUT1 100V 100V 100V 100V ~ AC INPUT INPUT2 INPUT1 IN&LINK IN&LINK 115 / 230V, 50 - 60Hz AC INPUT CONNECTION: When connecting power, connect the power cord to the connector and then plug it into an appropiate AC power outlet. -
Page 6: Installation
User’s Manual LUCKY TONE Compact Half Rack 100V PA Amplifiers Setups SET UP & INSTALLATION Installation CAUTION: Before you begin, make sure your amplifier is disconnected from the power source, with CAUTIO efore you begin, make sure your mixer-amplifi er is disconnected from the power the power switch in the “OFF”... - Page 7 Compact Half Rack 100V PA Amplifiers OUTPUT WIRING GUIDE For the amplifier output connectors, We recommend using heavy gauge speaker cable. Euro block screw terminals are provided for connection. Ensure there are no short circuits in your wiring by inserting the conductor completely into the terminal before securing so that the insulation prevents conductors from making contact.
- Page 8 Compact Half Rack 100V PA Amplifiers User’s Manual LU C K Y T O N E CONNECTION - CAUTION WARNING Never use both low impedance (8Ω) and high impedance (100V) terminals at the same time. CAU TION : Never use both the Low-Z(8 )and Hi-Z(100V ) terminals at the same time Switch the impedance selector to the desired output.
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Page 9: Choose Input Wire And Connectors
Compact Half Rack 100V PA Amplifiers User’s Manual LU C K Y T O N E Connections CONNECTIONS INPUT : Connect unbalanced or balanced line-level sources to amplifier inputs. Set volume Choose input wire and connectors accordingly. Connect unbalanced line-level signals to RCA input connectors. OUTPUT : Maintain proper polarity on output connectors. -
Page 10: Specifications
Compact Half Rack 100V PA Amplifiers SPECIFICATIONS Model A4218 A4219 A4220 A4221 A4222 A4223 A4224 A4225 Rated power (8Ω) 2x30W 4x30W 2x60W 4x60W 2x120W 4x120W 2x240W 4x240W Specifications Rated power (100V) 2x60W 120W 2x120W 240W 2x240W 480W 2x480W Specifications Input sensitivity 0dBu / 10K Ohm unbalanced/balanced. -
Page 11: Warranty Statement
Compact Half Rack 100V PA Amplifiers WARRANTY STATEMENT Redback warrants this product for two years from date of purchase. If this item is part of an installation or another product, please contact the installer or supplier for your warranty. During the warranty period, we undertake to repair or replace your product at no charge if found to be defective due to a manufacturing fault. - Page 12 Compact Half Rack 100V PA Amplifiers www.redbackaudio.com.au...
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