The Alfatron ALF-120W-UB is a compact Class-D commercial mixer amplifier designed for distributed audio and paging systems. Featuring built-in Bluetooth, USB MP3 playback, FM radio tuner, microphone inputs, and 70V/100V speaker support, the ALF-120W-UB delivers flexible audio performance for classrooms, retail stores, restaurants, coffee shops, offices, and commercial spaces.

With 120 watts of output power, priority paging functionality, and multiple built-in protection circuits, this amplifier is ideal for professional background music and public address applications. 

Powerful 120W Commercial Audio Amplifier

The ALF-120W-UB is designed for reliable distributed audio performance:

• 120W Class-D amplifier
• Supports 70V, 100V, and 4-16 Ohm speaker systems
• Efficient low-heat Class-D design
• Ideal for commercial audio and paging applications

Bluetooth, USB & FM Media Playback

Integrated media features provide flexible audio source options:

• Bluetooth wireless streaming
• USB MP3 player support
• Built-in FM radio tuner
• Includes remote control for easy operation

Flexible Microphone & Audio Inputs

Built for announcements, paging, and music playback:

• 2 microphone inputs
• Front microphone input with priority function
• Rear balanced XLR microphone input with phantom power
• 2 RCA line inputs
• RCA line output for additional audio routing
• EMC emergency input support

Priority Paging & Audio Controls

The ALF-120W-UB simplifies commercial audio management:

• Priority hierarchy:
  • EMC > MIC1 > Other sources
• Independent controls for:
  • Mic volume
  • AUX volume
  • Bass
  • Treble
  • Master volume

Built-In Protection Features

Designed for dependable long-term operation:

• Short-circuit protection
• Clip protection
• Overload protection
• High-temperature protection
• LED indicators for:
  • Power
  • Signal
  • Clip
  • Protect

Ideal Applications

Perfect for commercial and educational installations:

• Classrooms
• Retail stores
• Restaurants
• Coffee shops
• Offices
• Small commercial venues

Technical Specifications

• Rated Power: 120W
• Amplifier Type: Class-D
• Speaker Outputs:
  • 70V
  • 100V
  • 4-16 Ohms
• Bluetooth: Yes
• FM Radio: Yes
• USB MP3 Playback: Yes
• Inputs:
  • 2 Mic inputs
  • 2 Line inputs
  • 1 EMC input
• Outputs:
  • 1 RCA line output
• Power Supply:
  • AC100-240V
  • 24V backup power input

• Key Features

• 120W commercial mixer amplifier
• Bluetooth audio streaming
• USB MP3 playback
• Built-in FM tuner
• 70V/100V speaker compatibility
• 4-16 Ohm speaker support
• Microphone priority paging
• Phantom power support
• Emergency EMC input
• Compact Class-D amplifier design

Best Commercial Mixer Amplifier for Paging & Background Music

The Alfatron ALF-120W-UB is an excellent solution for commercial audio systems requiring both music playback and paging functionality. With Bluetooth streaming, microphone priority control, and support for distributed 70V/100V speaker systems, it works well in restaurants, retail stores, classrooms, and office environments.

Its compact Class-D design and built-in media playback features make installation simple while delivering dependable daily performance.