Need help?Do you have a question about the APART REVAMP4120T and is the answer not in the manual?
The REVAMP4120T is a professional 4-channel Class-D power amplifier designed for fixed installations, offering robust performance and high thermal efficiency. This amplifier is specifically engineered for 100-volt speaker systems, providing a versatile solution for various audio setups.
The primary function of the REVAMP4120T is to amplify audio signals for distribution to speaker systems, particularly in 100-volt applications. It utilizes high-power Hypex® Class-D amplifier modules, known for their efficiency and sound quality. The amplifier features four independent channels, each capable of delivering 120 watts at 100 volts. For higher power requirements, channels can be bridged, allowing for two channels to deliver 240 watts each at 100 volts.
An integrated Automatic Power Control (APC) limiter/compressor is a key feature, designed to automatically limit incoming audio signals to prevent overloads. This protective mechanism is crucial for safeguarding connected speakers from potential damage due to excessive signal levels. The amplifier also incorporates a soft-start switching power supply unit, which helps to prevent sudden power surges during startup, contributing to the longevity of the unit and connected equipment. Toroidal 100-volt transformers are used to ensure stable and reliable operation in 100-volt speaker line applications.
The REVAMP4120T is equipped with comprehensive protection circuits, including over-current and over-temperature protection, which automatically engage to prevent damage to the amplifier under adverse operating conditions. These circuits ensure the amplifier operates within safe parameters, enhancing its reliability and lifespan.
The REVAMP4120T offers a range of features designed for flexible and user-friendly operation in professional audio environments.
The amplifier provides both balanced and unbalanced input options. Balanced inputs are available via 3-pole Euroblock connectors for each channel, ensuring robust and interference-resistant signal transmission over longer cable runs. Unbalanced inputs are provided via RCA connectors, with a pass-through feature that allows the signal to be routed to other devices. Each input channel includes an input level attenuator, allowing users to precisely adjust the input gain to match the output level of their source equipment and prevent clipping.
Speaker outputs are provided via Euroblock connectors with multiple taps, offering flexibility for various speaker configurations. These taps include options for low impedance (4 ohms) and various 100-volt line voltages (35V, 50V, 70V, and 100V). It is important to note that only one output tap should be used per channel simultaneously.
The amplifier supports bridged mode operation, enabling two channels to be combined for higher power output. A dedicated bridge button on the rear panel allows users to switch between normal 4-channel operation and 2-channel bridged mode. When in bridged mode, the bridged LED indicator on the front panel illuminates.
Channels 1 and 2 feature an on/off dipswitch for a 250Hz high-pass filter. This filter is particularly useful when using 100-volt horn speakers, as it helps to remove low-frequency content that can be detrimental to their performance and efficiency.
The front panel provides clear LED status indicators for each channel, offering immediate visual feedback on the amplifier's operational status. These indicators include:
The amplifier is designed for 19-inch rack mounting and comes with removable rack ears, making it easy to integrate into existing rack systems.
A mains voltage selector on the rear panel allows the amplifier to be configured for either 230 VAC or 115 VAC, accommodating different regional power standards. The mains power cord connects to a dedicated inlet on the rear panel.
The REVAMP4120T is designed with several features to ensure reliable operation and ease of maintenance, although some tasks require qualified personnel.
The amplifier employs a convectional cooling system, supplemented by a temperature-controlled cooling fan. In normal operating conditions, the fan typically remains off, ensuring silent operation. The fan activates only when internal temperatures rise, providing additional cooling to prevent overheating. It is crucial to ensure that the fan area and all ventilation openings are kept free from dust and obstructions to maintain optimal cooling performance. The manufacturer explicitly states that at least one free rack space (44 mm) should be allowed above and beneath the amplifier when installed in a rack to ensure adequate airflow.
The mains fuse is located inside the unit. In the event of a fuse failure, it must be replaced with a fuse of the same current and voltage rating (5 AT/250V). This task should only be performed by qualified personnel to ensure safety and proper operation.
The amplifier should be cleaned only with a dry cloth. It is important to avoid exposing the apparatus to rain or moisture, and no objects filled with liquids (such as vases) should be placed on the unit. The unit is not designed for use in mobile applications (e.g., mobile discobars, PA systems, live bands, audio rental systems) and should only be used in fixed installations to prevent product damage and safety risks.
All servicing requirements, including issues such as a damaged power supply cord or plug, liquid spills, foreign objects inside the unit, or operational malfunctions, must be referred to qualified service personnel. The internal components are not user-serviceable, and removing the cover should only be done by trained technicians.
Proper ventilation is critical for the amplifier's performance and longevity. The unit should not be installed in confined spaces or built-in units (like bookcases) without ensuring adequate airflow. Ventilation openings must not be blocked by items such as newspapers, tablecloths, or curtains.
The device includes important safety warnings, such as the risk of electric shock and the need for proper earthing. The mains plug/appliance coupler serves as the disconnect device and must remain readily operable. Users are advised to unplug the apparatus during lightning storms or when it will be unused for long periods.
By adhering to these usage and maintenance guidelines, users can ensure the REVAMP4120T operates efficiently and reliably for an extended period, delivering high-quality audio amplification in fixed installations.
General| RMS Power per channel 4 ohms | 120 W |
|---|---|
| RMS Power bridged 8 ohms | 240 W |
| Minimum impedance bridged | 8 ohms |
| THD+N | < 0.05% |
| 19" Mountable | Yes |
| Height- rack units (1U=44mm) | 1U |
| Frequency response | 20 Hz - 20 kHz |
| Cooling | Fan cooled |
| Power supply | 230 VAC / 50-60 Hz |
| Impedance | 4 ohms |
| Input Impedance | 20k ohms balanced, 10k ohms unbalanced |
To Next Page
