ALFAtron ALF-PA2B PA2B 2 x 20W Compact Digital Amplifier

Compact Audio Amplifier for Small Commercial Spaces

The ALFAtron ALF-PA2B is a professional-grade mini digital amplifier designed for classrooms, cafes, pubs, and other environments that demand reliable, clean sound reinforcement in a small footprint. With its 2 x 20W output at 4 ohms and switchable 1 x 40W bridged mode at 8 ohms, this compact device brings audio amplification to tight spaces without sacrificing power or flexibility.

Multiple Input Options and Signal Routing Control

Equipped with two stereo line inputs and a balanced microphone input, the PA2B gives users flexible routing choices for playback and voice amplification. Whether you're using a wireless mic, dynamic mic, or condenser microphone with 48V phantom power, this amp handles it all. The ability to toggle inputs using panel buttons, RS-232, or IR remote ensures ease of use in both permanent installations and temporary setups.

Independent Volume and EQ for Clearer Sound Output

The PA2B includes independent control for volume, bass, and treble settings, allowing fine-tuned adjustments per source. A built-in mic mixer lets users blend mic input directly with line audio and adjust its volume independently—ideal for live speech mixed with background music in retail or education environments.

Bridge Mode and Dual-Mono Capabilities for Versatile Setups

This amplifier adapts to different speaker configurations with selectable bridge mode for 1 x 40W output and dual-mono functionality that replicates a mono signal across both outputs. These features are especially useful when designing distributed audio systems in commercial or multi-zone layouts.

Clean Performance with Auto Noise Gate and Passive Cooling

The auto noise gate detects input activity and automatically mutes output when there’s no signal, maintaining a quiet noise floor. Its convection cooling system ensures consistent thermal performance without the need for fans, and the anti-static chassis protects the device from environmental wear and interference.

Built for Integration with Control Systems and Simple Installations

Control via RS-232 makes the PA2B ideal for integration with third-party AV systems or automation platforms. Compact and mountable, this amplifier is perfect for installations that require audio management with minimal space and maximum reliability.