BST APM1120 - Compact 120W PA Mixer Amplifier with USB, SD, Bluetooth, FM and Remote Control

BST APM1120 – Compact 120W PA Mixer Amplifier with USB, SD, Bluetooth, FM and Remote Control

The BST APM1120 is an all-in-one solution for small PA installations, combining a USB player, SD card reader, Bluetooth connectivity and an FM tuner in a compact 19" rackmount chassis (1 U). It features two unbalanced microphone inputs (MIC 1 with priority function and MIC 2 with +48 V phantom power), two auxiliary inputs, a line output for powering an additional amplifier and a high-definition display showing information on the current program. Individual volume controls for each source, master control, bass and treble adjustments and a remote control allow for simple and precise management. It also integrates thermal, short-circuit and overload protection, a peak current limiter, as well as a step-up transformer for 70 V and 100 V systems and a low-impedance output (4–16 Ω). It operates on dual power supplies (100–230 V AC and 24 V DC), ideal for environments requiring backup power.

Main features

• Output power: 120 W RMS.
• Front USB player and SD card reader (MP3/WAV).
• Built-in Bluetooth and FM tuner (87.5 – 107.5 MHz).
• IR remote control for remote control of all functions.
• 2 unbalanced microphone inputs: MIC 1 with priority, MIC 2 with +48 V phantom.
• 2 AUX inputs (RCA).
• Line output for connection of additional amplifier.
• High definition LCD display.
• Individual and master volume controls.
• 2-band equalizer: bass and treble ±10 dB.
• Protections: thermal, short circuit, overload and peak limiter.
• Step-up transformer compatible with 70 V and 100 V lines.
• Low impedance output: 4 – 16 Ω.
• Dual power supply: 100–230 V AC / 24 V DC.
• 19″ rack format, 1 U; dimensions 483 × 366 × 89 mm; weight approx. 4.8 kg.

Product benefits

• Compact integration: Multiple sources in a single 1U unit to save rack space.
• Priority and clarity: MIC 1 always prevails with automatic muting of other inputs.
• Connection flexibility: USB, SD, Bluetooth, FM, microphone and line outputs for adding more amplification.
• Total control: Independent volumes, master, tone and remote control make operation easy.
• Professional reliability: Complete protections and dual power supplies ensure continuous service.

Use cases

Ideal for small shops, bars, classrooms, meeting rooms, and offices that require background music, announcements, or PA systems with a variety of sources and require power backup.

Frequently Asked Questions

• What is the maximum USB or SD card size supported? Up to 32 GB in FAT16/FAT32 format.
• How do you configure the phantom power on MIC 2? Use a front switch that activates +48 V only on the second microphone input.
• Does it work with 24 V DC in backup installations? Yes, it allows backup power with a battery or external 24 V DC source.

Description for projects

Compact 120W RMS PA mixer-amplifier with USB/SD, Bluetooth, FM, remote control, 2 unbalanced microphones (MIC 1 priority, +48V phantom on MIC 2), 2 AUX, line output, LCD display, individual and master volumes, 2-band equalizer, thermal protections, short circuits, overload and peak limiter, 70/100V step-up transformer, 4–16 Ω output, 100–230 V AC and 24 V DC power supply.