The AURA-4B900 is a robust and high-output four-channel Class D amplifier, delivering an impressive 4 × 900W RMS at 4Ω. Designed for demanding commercial and professional installations, it provides exceptional flexibility with support for both low-impedance (2, 4, 8Ω) and high-impedance (70/100V) loudspeaker systems, selectable via a rear-panel switch. It also supports dual or bridge mode (4/8Ω), allowing higher power output when system requirements demand it.

Equipped with four analogue audio inputs, the amplifier uses Euroblock input and output connectors with an anti-pulling locking system to ensure secure, stable connections in permanent installations. A link output for Input 1 enables easy signal distribution to additional amplifiers, simplifying system expansion.

For installation security and operational control, the front-panel volume knobs can be locked using rear-panel switches to prevent unauthorized adjustments. The high-efficiency Class D design minimizes heat generation and power consumption, while the integrated Auto Standby function further enhances energy efficiency by reducing power usage when no audio signal is present.

Comprehensive protection systems—including fan cooling, thermal protection, overload protection, and an anti-clip system—ensure reliable long-term performance and safeguard both the amplifier and connected loudspeakers.