Audac AUA-ATU44MK2 Universal Input Adapter Universal Input Adapter

The Audac ATU44MK2 is a four-channel audio transformer unit designed to convert low-impedance amplifier outputs into 70 V or 100 V line signals for distributed audio systems. It allows standard low-impedance amplifiers to be used in constant-voltage speaker installations, commonly used in commercial sound systems.

The unit is typically installed between the amplifier and the loudspeaker network, enabling long cable runs and multiple speaker connections while maintaining stable signal levels. With four independent transformer channels, the ATU44MK2 provides flexible configuration for multi-zone or distributed audio setups.

The device is ideal for commercial installations such as retail stores, offices, restaurants, hospitality venues, education facilities, and public buildings where constant-voltage speaker systems are required.

Key Features

• 4-channel audio transformer unit
• Converts low-impedance amplifier outputs to 70 V / 100 V line
• Allows standard amplifiers to operate in distributed speaker systems
• Independent transformer channels for flexible installations
• Designed for professional commercial audio systems

Applications

• Distributed 70 V / 100 V audio systems
• Commercial background music systems
• Retail and hospitality audio installations
• Public address systems
• Education and corporate facilities

General Specifications

Product type: Audio transformer unit
Channels: 4 independent transformer channels
Function: Low-impedance to 70 V / 100 V line conversion
Application: Distributed audio installations

Construction

The unit is designed for professional AV installations and integrates easily with rack-mounted audio equipment.