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This volume control attenuator for 5 zones in 40W / 100V line is versatile, allowing the user to choose from five single inputs to five outputs or one input to five outputs. Each zone has a 40W load capacity and the panel can handle a total of 200W. With six settings and an off option, the input and outputs are connected using heavy duty screw terminals on the rear panel, all housed in a 2 unit rack panel. It also comes with an engraving strip to label speaker zones. Designed specifically for use in 100V line commercial PA systems. Specifications Power rating: 200W (40W per zone) Relay override operation voltage: 24V DC Dimensions: 484W x 50D x 88H mm Weight: 2.3kg

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This versatile Microphone/Line Pre Amplifier is designed to convert either a microphone or line input into a balanced high level signal. The mic input can be connected through a balanced XLR, while the line input can be connected through 2 x RCA sockets or a 3.5mm jack. The output signal, carried through Cat5e cable, can be distributed up to 300m without any interference. For even greater flexibility, the A 4928 line output box (or other Redback UTP compatible product) can be used to provide a balanced high or low level output, as well as an unbalanced Aux output signal to be routed to an amplifier. Power is conveniently provided through the Cat5e cable connection. In addition, a 24V DC switched output with a maximum current draw of 120mA can be activated when the VOX output of the pre-amplifier is in use.Use with Redback A4432When paired with A4432, this device allows for overriding the input to a specific zone using a local input source in that zone. This could include a mobile phone for background music or a microphone for speeches at a wedding. The wall plate and box offer connections for a 3 pin XLR microphone, dual RCA line level input, and a 3.5mm line level input for portable devices, providing a versatile range of options for input sources. Part of the Redback UTP Solutions Range.As a versatile addition to the Redback UTP solutions range, this product offers a variety of interchangeable transmitters and receivers. These allow for seamless connection of various audio signals between local zones and equipment racks. To find compatible items in the Redback range, consult the convenient connection matrix for this product. Specifications Input Mic Level Sensitivity: 3mV Input Line Level Sensitivity: 1V Music Input Line Level Sensitivity: 200mV Output Connector: RJ45 8P8C Input Connectors (Audio): 3 pin XLR balanced, 2 x RCA, 3.5mm JACK Dimensions: ~133W x 65D x 44H Weight: ~0.2 kg

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These compact 1RU rack mount amplifiers are suitable for both stand alone PA system use, or as zone amplifiers in larger systems requiring local inputs. All models operate on 240V AC or 24V DC for battery backup operation.The input consists of a 3-pin XLR which can be set for either balanced mic level (3mV) or balanced line level (2V), adjusted via a rear-mounted trimpot. A dual RCA input is also provided with adjustable sensitivity of either 300mV or 1V. Phantom power is also provided on the input XLR. The circuit includes protection features in case of output over voltage, over current and over temperature. All are self re-setting once the fault condition is removed. Visual indication via front panel LEDs display amplifier status at all times. Features Compact 1RU 19” rack mount design Balanced mic or line input 100V line output Phantom power Overload limiting Over voltage limiting On demand fan cooling (60W and 100W versions only) Over temperature shut down protection Dual input connectors Variable input sensitivities 240V AC / 24V DC operation Australian designed & manufactured Specifications Power Outputs A 4240A: 60 watts RMS Distortion: < 0.5%, @ 1kHz Frequency Response Mic input: 50Hz - 12kHz, -3dB Line input: 50Hz - 15kHz, -3dB Sensitivity Mic input: 3mV-2V balanced Line input: 300mV-1V Signal to noise ratio Mic input: > 75dB below rated output Line input: > 81dB below rated output Output Connectors Speakers: Screw terminals (100V line) Input Connectors Inputs: 3 pin XLR balanced or 2 x RCA 24V DC power: Screw terminals 240V AC power: IEC power connector Current Draw Min: 170mA Max: 4.5A Size & Weight Dimensions: ≈ 483W x 210D x 44H Weight: ≈ 5.5kg

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These modules are specifically engineered for emergency evacuation systems, operating on an external 24V DC power supply. With a line level audio input, they can generate a 100V line output through a highly efficient transformer. These modules come equipped with short circuit, overload, and thermal cutout protection, and boast a durable steel chassis. Features Powered by 24V DC 100V line audio output Line level audio input Short circuit, overload and thermal cutout protection Bolt-in chassis construction Specifications Output Power: 250W RMS Current Draw: 17A at full load (360mA quiescent) Frequency Response: 40Hz - 13kHz Distortion: <0.6% SNR: -91dB Sensitivity: 600mV RMS Operating temperature: -10°C to +60°C Dimensions: 300W x 240D x 95H

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Experience versatile and reliable sound amplification with Redback Compact 1RU Public Address Mixer Amplifier 30W A4235. Whether used as standalone or as a zone amplifier in larger systems, these compact 1RU rack mount amplifiers are the perfect solution. With the ability to operate on both 240V ac and 24V dc for battery backup, you can count on uninterrupted sound in any setting.The Redback Compact 1RU Public Address Mixer Amplifier 30W A4235 includes six source options on two inputs, offering versatility for your audio needs. Input one features a 3-pin XLR with the option for balanced mic level (3mV) or balanced line level (2V), adjustable with a trimpot located on the rear panel. Additionally, a dual RCA and 3.5mm jack can be found on input one, with adjustable sensitivity of 100mV or 1V. Input two includes three sets of dual RCA sockets on the rear panel and a 3.5mm jack on the front panel. Selection between auxiliary sources is made simple with the front panel switch. Input one also offers the option for VOX mute of input two, selectable through DIP switches. Phantom power is available for the XLR input of input one. Convenient volume level controls are located on the front panel for both inputs one and two.The Redback Compact 1RU Public Address Mixer Amplifier 30W A4235 includes advanced protection features for safeguarding against output over voltage, over current, and over temperature. These features are automatically reset once the fault is resolved, with clear visual indication provided through front panel LEDs to display the amplifier's status at all times. Features Compact 1RU 19” rack mount design Balanced mic or line input 100V line output VOX muting Phantom power Four auxiliary inputs Overload limiting Over voltage limiting On demand fan cooling Over temperature shut down protection Dual input connectors Variable input sensitivities 240V ac / 24V dc operation Specifications Distortion: < 0.5%, @ 1kHz Frequency response: 50Hz - 15kHz, -3dB Output line: 100V Mic sensitivity: XLR balanced 2mV to 2V Line sensitivity: RCA 100mV/1V, 3.5 TRS 600mV Signal to noise ratio: > 80 dB Input 1: 3 pin XLR balanced / dual RCA Input 2: Dual RCA x 3 / 3.5mm TRS jack x 1 24V dc power: Pluggable screw terminals 240V ac power: IEC power connector Speaker output: Pluggable screw terminals (100V line) Current Draw: 160mA Standby, 2.5A Full @ 24V dc Protection: 1A ac & 3A dc breaker Dimensions: ≈ 483W x 210D x 44H A 4235 Weight: ≈ 4.5kg

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These 1RU amplifiers are suitable for both standalone PA system use and as zone amplifiers in larger systems with local inputs. All models can operate on 240V AC or 24V DC for battery backup. They offer six source options on 2 inputs, including a 3-pin XLR with balanced mic or line level capabilities (adjusted via trimpot), and a dual RCA with adjustable sensitivity of 300mV or 1V. Additionally, input two features three sets of dual RCA sockets on the rear panel and a 3.5mm jack on the front panel, with source selection through a front panel switch. Input one can also be selected for VOX mute input two using DIP switches.Phantom power is available for input one XLR, while front panel level controls are provided for inputs one and two. The circuit is equipped with protective features for potential output issues, including over voltage, over current, and over temperature situations. Once the fault is resolved, these protections will reset automatically. Amplifier status can be easily monitored at all times through the front panel LEDs. Features Compact 1RU 19” rack mount design Balanced mic or line input 100V line output VOX muting Phantom power Four auxiliary inputs 3.5mm Jack Input (Front Mounted) Overload limiting Over voltage limiting On demand fan cooling (60W and 100W versions only) Over temperature shut down protection Dual input connectors Variable input sensitivities 240V AC / 24V DC operation Australian designed & manufactured Specifications Power Outputs Output: 60 watts RMS Distortion: < 0.5%, @ 1kHz Frequency Response Mic input: 50Hz - 12kHz, -3dB Line input: 50Hz - 15kHz, -3dB Sensitivity Mic input: 3mV-2V balanced Line input: 300mV-1V Aux inputs: 300mV - 1V 3.5mm input: 600mV Signal to noise ration Mic input: > 75dB below rated output Line input: > 81dB below rated output Output Connectors Speakers: Screw terminals (100V line) Input Connectors Inputs 1: 3 pin XLR balanced or 2 x RCA Input 2: 3 x RCA and 3.5mm Jack 24V DC power: Screw terminals 240V AC power: IEC power connector Size & Weight Dimensions: ≈ 483W x 210D x 44H Weight: ≈ 5.4kg

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Redback Desktop Phantom Power Supply | XLR Connections (48V USB-Powered) Portable Phantom Power for Condenser Microphones The Redback Desktop Phantom Power Supply is a compact, USB-powered 48V solution designed for powering condenser microphones in podcasting, streaming, field recording, and mobile content creation. Featuring balanced XLR input/output and an additional 3.5mm stereo mixed output, it integrates seamlessly with mixers, audio interfaces, portable recorders, cameras, and computers. With its rugged metal housing, status LEDs, and portable form factor, this unit is perfect for desktop studios and on-the-go creators who need reliable phantom power without bulky power bricks.  Key Features: USB Powered – Plug into any USB port or power bank for portable operation 48V Phantom Power – Fully compatible with professional condenser microphones Balanced XLR Input & Output – Maintains high-quality, noise-free signal flow 3.5mm Stereo Mixed Output – Directly connect to cameras, portable recorders, or computers Compact Metal Enclosure – Durable and road-ready for field work Status LEDs – Power and input indicators for quick reference Versatile Applications – Ideal for podcasting, live streaming, mobile recording, and location audio work  Specifications: Output Voltage: 48V ±2V Frequency Response: 20Hz – 20kHz Signal-to-Noise Ratio: 60dB Sensitivity: -36dB ±2dB Dimensions: 160 × 90 × 50 mm Weight: 600g Power Supply: USB-powered  Ideal For: Podcasters & Streamers – Clean power for studio mics Videographers – Phantom power for location audio rigs Musicians – Portable mic powering for rehearsals & demos Field Recordists – Battery bank-friendly for remote shoots  Why Choose the Redback Desktop Phantom Power Supply? No bulky adapters – runs from any USB source Professional-grade 48V output for condenser mics Extra monitoring/output flexibility with 3.5mm stereo out Strong, compact, and portable for both studio and field use

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Enables you to track and record the quantity of events initiated by a pair of closing contacts. Records event dates and times to the internal Micro SD card for convenient review. Offers a 24V DC output (NC or NO) to power external systems such as a buzzer or light. Can be programmed to activate after each event or after a specified number of events. The output also includes an adjustable ‘ON’ time delay that can be set anywhere between 0s and 10s (in intervals of 100ms). Powered by the provided 24V DC plugpack. Features Events triggered by closing contact Event time and date recorded Power ON time and date recorded 24V DC switched output Adjustable output ON Time delay Adjustable output Event count Battery Backup (Time only) Micro SD card supplied CR2032 backup battery supplied 24V DC operation Supplied with 24V DC plugpack  

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The A 1715 is a DIN rail MP3/SD message player that is housed in a convenient design. It features four independent contacts for remote triggering of four available MP3 audio files, allowing for recorded messages, music tracks, or any audio in MP3 format. All files are stored on the included Micro SD card. Audio is output through dual stereo line level RCA connections and the unit is powered using the provided 24V DC plugpack. Features Four MP3 audio messages available Micro SD Card storage of MP3 files (supplied) Stereo Dual RCA output Remote triggering of MP3 playback Manual playback of MP3 files 24V DC operation Supplied with 24V DC plugpack

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This compact module enables remote volume adjustment of low level signal sources for amplifiers or mixers through RS 232 or RS 485 serial control. It can be used with the "Redback Touch" wallplate or other third-party control systems. A 24V DC power supply is required. Features two RCA inputs (selectable via serial control) and remote volume control.

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Enables remote operation of the A4565A or A4595A Fire Test and Fire Alarm tones. Momentary operation switches require a press of up to 3 seconds for activation. Protective flip-up covers prevent accidental operation.The Redback Fire Alarm Test Wallplate, Suit A4595 A4597, can be connected to the A4565A or A4595A through standard Cat5e cabling, with a maximum range of 300m. Up to four wall plates can be cascaded together for maximum efficiency. On the back of the A4597 wall plate, there are two RJ45 ports available for usage. It is important to note that pressing the Fire Test and Fire Alarm switches on the A4597 while the A4565A or A4595A main unit is in "Manual" or "Isolate" mode will have no effect. In addition, the Fire tone can be activated by using the contact on the rear of the A4565A or A4595A. To accommodate your specific installation needs, two snap-on covers are included with the wall plate.Please Note: the Fire Test and Fire tones cannot be triggered by any other means than the A4597 wall plate.

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This microphone/line receiver hub can handle audio from up to four A 4931 zone wallplates or other Redback UTP transmitters. The A 4931 wallplate accepts both microphone and line inputs, converting them to balanced high-level outputs. The 3V signal is transmitted via Cat5e cable (capable of distribution up to 300m without interference) back to the hub. Mic inputs use a balanced XLR connection, while line inputs can be made through 2 RCA sockets or a 3.5mm audio jack for portable devices with a lower-level line output. The hub features individual output channels for each transmitter and includes front-mounted volume controls. Users can adjust DIP switches to choose which source is sent to the main combined output. Each output, including the main output, can be set to balanced mic/line or unbalanced line levels via DIP switches. The included plugpack provides 24V DC power for the hub. Part of the Redback UTP Solutions Range.Explore the Redback UTP solutions range with the Four Output Microphone/Line Hub A4930. Create seamless connections between different audio signals and local zones, and easily integrate with equipment racks. Refer to the connection matrix to see the full range of compatible items. Features Connects to A 4931 transmitter wallplate or other Redback UTP transmitter (see connection matrix) Connect up to four audio zones together. Easy Cat5e/6 UTP data cabling connection. Up to 300m cable runs out to zones. Balanced Euro terminal block connections. Balanced mic or line level operation. 24V DC operation. Australian designed & assembled. Rack MountingTo properly incorporate any of the Redback half rack products into a 19" racking system, the H 4990 bracket is essential. In cases where a single product is being mounted with the H 4990, a metal (H 4992) or plastic (H 4993) infill panel may be used for a more streamlined appearance. Specifications Output Mic Level: 3mV Output Line Level: 1V Output Connectors: Audio Outputs: Euroblock terminals Input Connectors: Wall Plate Inputs: RJ45 8P8C 24V DC Power: 2.1mm JACK (centre +ve) 24V DC Power: Euroblock terminals Controls: Volume1-4: Front Volume Power Supply: 24V DC @ 1 Amp Dimensions: 210W x 122D x 44H Weight: 0.4 kg

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This unit is specifically designed to monitor the condition of 100V line speaker systems in emergency paging and fire evacuation installations. It can handle large commercial speaker circuits with loads of up to 250W per zone, whereas traditional line monitoring units were limited to 50W per zone. The A 4567C is capable of handling loads of up to 500W per zone. Its microprocessor controlled circuit provides continuous monitoring of loudspeaker lines for normal, open, or short circuit conditions. An LED indicator, with multiple colors, displays the line's condition for each zone. The Redback Line Monitoring Unit 10 Zone A4567C includes a built-in buzzer with a cancel button for audible alarm alerts. The unit also offers a switched output for remote monitoring in the event of a fault condition. The output is a ground signal and the unit provides three outputs: one for short circuit conditions, one for open circuit faults, and one combined output for any fault condition. The unit can be customized to work with multiple amplifiers. Dimensions: 482 x 152 x 44mm. Features 1U 19" rack mount Monitors 10 zones @ 500W max Configurable for use with 1 to 10 individual amplifiers. ie 1 amplifier per zone/circuit or 1 amplifier per many zones/circuits. Monitors normal, open and short circuit conditions Switched output for remote fault monitoring Pluggable terminals for all connections 24V dc operation Includes Power Supply Wiring RequirementsThis unit is specifically designed for "loop in loop out" serial wiring to loudspeakers and requires a 100kΩ terminating resistor at the end of the line. The use of star wiring or tee offs is strictly prohibited. In order for each loudspeaker to function properly, a series connected 22µf bipolar capacitor is also necessary. Additionally, a 10-second delay is included to minimize false alarms when detecting faults.A 4568 Zone Status InterfaceWhen using the A 4568, you can effectively track the state of every individual zone by setting up the interface in two different ways. The LED status can either indicate a normal or faulty state (without differentiating between open or short) or it can specifically display if there is an open or short. A Cat 5e patch lead is used to connect the A 4567C and A 4568, with screw terminals available for each zone.

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This device supplies either microphone or line level output that can be easily connected to an amplifier input. Connection between the A 4660 paging console and this unit is established through a Cat5e cable, providing both power and a balanced audio output from the microphone.

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The Redback® A 2069 Remote Plate can remotely control the Redback® A 4505 Lockdown Timer with Lockdown, Fire, Chime, and Cancel buttons. It can be placed up to 100m from the main unit, and connected with a minimum of 8 wires. The distance can be extended up to 30m with standard Cat5/6 cable, but installations beyond that will require a heavier duty cable to prevent voltage drop and ensure switch LEDs light up. (Note: This plate uses screw terminal connections).

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This pre-amplifier allows for the use of both microphones and auxiliary inputs, converting them to a balanced high level signal. The output is able to be distributed up to 500M without interference and has an available output level of up to 3V. Volume controls for both inputs, as well as a master volume control, are included. The microphone input is balanced with an XLR connection, while the auxiliary input has 2 RCA sockets and a DIP switch attenuator for adjusting input signal levels. The output is connected via a male 3 pin XLR.This product features two inputs, one for a Balanced Mic with 1.5mV input level and the other for a line level with adjustable sensitivity (200mV, 500mV, or 1V) through DIP switches. Separate volume controls are provided for the Mic and Aux inputs, while the overall output volume can be adjusted using the Master volume control. The unit operates solely on 24V DC power.This product does not come with a power supply. It needs 24V DC @ 500mA and a compatible plug pack M 8968B. Features XLR Mic input RCA Aux input XLR balanced output. Phantom power to Mic Input (15V DC). Controls for AUX, MIC and master volume. DIP Switch selectable AUX input sensitivity. 24VDC operation via 2.1mm DC power jack. Shipping Weight: 0.27Kg Specifications Power: 24V DC Input (2.1mm) Max current draw: 40mA @ 24V Frequency response: 30Hz to 10KHz (±0.5dB) Noise: > -50dB Controls: Master, Mic and Aux volume Weight: 240gm Dimensions: 133W x 65D x 44H mm Colour: Black Input: XLR (Microphone): Reference level, 1.5mV RCA (Auxiliary): DIP switch selectable level (Nominal: 0.2V, 0.5V, 1V) Mic input impedance: 600Ω Balanced Line input impedance: 10kΩ Output: Connection: Balanced 3V XLR (8.5V p-p) Output load required: 600Ω nominal, balanced Output level: +15dBM

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The A4906 is a multifaceted device that can accommodate a line-level signal, balanced microphone signal, or 100V input signal. Its output is a line level signal that can be easily connected to an amplifier. The microphone input offers phantom power and a VOX circuit with adjustable sensitivity, which activates output relays. The device runs on a 24V DC power source. Covering all your needs, the A4906 allows you to easily connect to an amplifier with its versatile input options and line-level output signal. With features like phantom power and adjustable sensitivity, this device is a reliable and powerful tool powered by a 24V DC power source.This unit does not come with a power supply. It needs a 24V DC input and can support up to 500mA. A suitable plugpack is necessary such as the M 8968C. Features Mic, line or 100V input level. Line level output. Phantom power to Mic Input (12V DC). Controls for master volume and VOX sensitivity. VOX operated relay outputs. 24VDC switched output. (120mA Max). VDC operation via 2.1mm DC power jack. Dimensions 133W x 30H x 80D mm. Weight: 0.28 Kg

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This wall plate for microphone and line inputs features a balanced high level output converted from either input. The 3V signal is transmitted through Cat5e cable, allowing for distribution up to 300m without interference, to a compatible UTP receiver unit from Redback. The mic input uses a balanced XLR, while the line input can be connected through 2 x RCA sockets or 3.5mm audio jack for portable devices with a lower level output. Power is provided to the plate via UTP cabling.Use with Redback A4480B and A4432The wall plate allows for a local input source in a specific zone to override the overall input. This could include a mobile device for background music or a microphone for speeches at a wedding event.

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This pre-amplifier wall plate is versatile, accepting both microphone and line inputs and converting them to a balanced high level output. The resulting 3V signal can be transmitted up to 300m without interference via Cat5e cable, making it perfect for large spaces. The mic input is balanced XLR, while the line input offers options for both 2 x RCA sockets and a 3.5mm audio jack, making it compatible with a variety of devices. Power is conveniently supplied through the UTP cabling, making installation a breeze.Use with Redback A4480B and A4432This wall plate allows for overriding the input to a designated zone using a local input source within that zone. For example, a mobile phone can be used for background music or a microphone can be used for speeches at a wedding event..Part of the Redback UTP Solutions Range.Explore Redback's UTP solutions range, featuring a diverse selection of transmitters and receivers designed to seamlessly connect various audio signals between local zones and equipment racks. Refer to the connection matrix to identify which items in the Redback range are compatible with this product. Specifications Input Mic Level Sensitivity: 3mV Input Line Level Sensitivity: 1V Music Input Level Sensitivity: 500mV Output Connector: RJ45 8P8C Input Connectors: Audio: 3 pin XLR balanced 2 x RCA, 3.5mm JACK

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This REDBACK MP3/SD Random Message Player A1745 easily connects to any existing stereo input and delivers intervalled messages and background music to enhance the customer experience. The 8GB SD card included offers the option to customize background music and promotional messages for your business. The player allows for adjustable message intervals ranging from 30 seconds to 7.5 minutes. It also features a standard stereo RCA line output for convenient connection to existing PA or telephone systems. Playback starts automatically upon switching on, and files play in the specified order within the designated 'music' or 'messages' folders (alpha-numerically).Plugpack included. Features Connects to standard stereo input SD card input for custom track storage Randomised playback. 12-30V @ 300mA DC operation Includes 8GB SD card Adjustable message interval timing (30s to 450s) Ideal for in store background music promotion Includes power supply

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This module is suitable for emergency evacuation systems and operates using a 24V DC power source. It can receive a line level audio input and generate a 100V line output through a transformer. Additionally, it offers protection from short circuits, overload, and thermal cutouts, and is built with a steel chassis. With its focus on reliability and strong performance, this is the optimal audio power source for evacuation systems and other applications that require a DC-powered 100V line amplifier. Features Powered by nominal 24V DC 100V line audio output Line level audio input - 600mV Short circuit, overload, and thermal cutout protection Bolt-in chassis construction Australian designed and assembled Specifications Output Power: 120W RMS Current Draw: 8A at full load, 220mA Quiescent Freq. Response: 50Hz - 12kHz Distortion: < 0.6% Signal to Noise Ratio: -91dB Sensitivity: 600mV RMS Fuse Rating and Type: 7.5A M205 Dimensions: 210W x 170D x 87Hmm

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These modules are specifically engineered for incorporation into emergency evacuation systems. They require an external 24V DC power supply and support line level audio input, generating a 100V line output using a built-in transformer. The modules boast protection from short circuits, overloads, and thermal cutout, and are built on a durable steel chassis. Features Powered by 24V DC 100V line audio output Line level audio input Short circuit, overload and thermal cutout protection Bolt-in chassis construction Specifications Output Power: 60W RMS Current Draw: 3.8A at full load (100mA quiescent) Frequency Response: 45Hz - 12kHz Distortion: <0.3% SNR: -94dB Sensitivity: 600mV RMS Protection: 4A Operating temperature: -10°C to +60°C Dimensions: 210W x 170D x 85H

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The Redback Phase 5 amplifier series was designed and developed over a span of 2 years in Australia, adhering to strict engineering standards. Extensive input and consultation from professional sound contractors and installers nationwide contributed to the remarkable performance and reliability of this series. With a multitude of features, these amplifiers are highly recommended for demanding industrial PA system applications. Furthermore, they feature on-demand multi-staged thermally cued fan forced cooling.The output power stage of the Redback Phase5 Boost Public Address 2x125W Amplifier A4372 is equipped with thermal monitoring, allowing for automatic operation of a long-lasting computer-style cooling fan that can be switched "off" or "on" based on airflow needs. In normal use or during paging mode, the fan remains inactive. However, over temperature sensing is in place to safeguard against extreme overheat situations, such as excessive load or improper use of the amplifier. The system will automatically restart once normal temperatures are reached, and there is also output peak limiting for added protection.The output voltage is capped at a maximum of 105V RMS regardless of the load impedance, to protect the speaker load from damage. Compared to standard 100V line PA amplifiers, which can supply over 180 volts in high drive and low load conditions, this amplifier's output voltage is significantly lower. This is important, as excessive voltage can rapidly destroy any connected loudspeakers. Features Robust design incorporating latest Mosfet technology Very Low noise and distortion 100V outputs 240V AC or 24V DC operation Multi stage thermally cued fan cooling Output Peak Limited Thermal Overload protected Signal Presence Indicators Fault Indicators Power Status Indicators Rack Mountable (suits 19 inch racks) Specifications Power Output: 2 x 125 Watts RMS Distortion: < 0.5%, @ 1kHz Output Line: 100V Frequency Response Mic Inputs: 50Hz - 12kHz, -3db Mic Sensitivity (3 pin XLR): 500mV Signal to noise ratio Mic Inputs: > 75db below rated output Line Output: 600Ω balanced, 0dB , 3 Pin XLR Output Connectors Speakers: Screw terminals Input Connectors Inputs: 3 pin XLR balanced 24V DC power: Screw terminals 240V AC power: IEC power connector Controls Mic inputs: Volume Power: On/off switch Indicators: Power, signal present, output peak limiting, overtemp ,current limit, Protect, Half Power, 24V DC, Mains Power Supply: 240V AC or 24V DC Fuse Protection: 7.5A AC , 2x 10A DC Dimensions: ≈483W x 410D x 88H

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This Redback 4 Zone 250 Watt 100V Public Address Mixer Amplifier is similar in functionality to the A 4377/A4387 amplifiers with the addition of four 100V line output zones. During normal use, you are able to select via the front panel switches, any zone on or off to control BGM programming. Remote paging to each zone is made possible by connecting the A 4660 paging console to the amplifier via Cat6 cable (2 consoles @ max 300m). This allows for paging to selected zones or all call, muting BGM to all zones. At the completion of the announcement, music will be restored to previously selected zones. BGM can also be selected on or off to all zones remotely from the paging console. When using the paging console, these microphones assume priority between input 1 and input 2 on the amplifier. If two consoles are connected, they operate on a first in, first served basis, activating a system busy indicator on the inoperative console. Features Multi-stage thermally cued fan cooling 2U 19” rack mount (with optional A 4376) Tape record out terminals Provision for connection to Redback A4660 touchscreen paging console MP3 based Alert/Evac tones with MP3 voice over message for emergency tones (built in) 3 mic input and 4 auxiliary inputs Phantom powering available on all inputs Adjustable vox muting on inputs 1 & 2. Bass and treble tone controls Terminals for 100V line output 240V AC or 24V DC power operation Thermal & fuse overload protection Built in short circuit protection Australian designed & assembled Specifications Power output: 250W Distortion: <0.5% @ 1kHz Output line: 100V Frequency response: 50Hz - 12kHz, -3dB Line inputs: 300mV Mic line sensitivity: 3mV balanced Mic input: >75dB below rated output Line inputs: >81dB below rated output Speaker connection: Pluggable terminals Power connection: IEC or 24VDC pluggable terminal Audio inputs: 3 pin XLR, stereo RCA, 3.5mm jack Controls: Volume (3), Bass, Treble, Master, Zone Selection (4) Bass adjustment: ±10dB @ 100hz Treble adjustment: ±10dB @ 10kHz Indicators: Power, 24VDC, Fault, Peak Limit, Over Load, Paging Active Fuse protection: 7.5A AC, 10A DC Power: 240V AC or 24V DC (nominal) Dimensions: 483 x 270 x 88mm

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