BST UPA120TU - 120W PA Amplifier with USB/SD and Tuner for 4 Zones

BST UPA120TU - 120W PA Amplifier with USB/SD and Tuner for 4 Zones

The BST UPA120TU amplifier is a compact (2U) rack-mount amplifier that delivers 120 W of power to 100 V, low-impedance (4–8 Ω) line-based PA systems. It features a mixer with four microphone inputs with XLR/jack combo connectors and +48 V phantom power switching, a stereo line input, an EMC telephone input, and a REC output. The USB/SD module plays MP3 files from external memory and features an LCD display, while the built-in AM/FM tuner allows quick access to radio stations. Its echo, siren, and chime functions, along with priority on microphone 1 and the EMC input, guarantee professional intercom control. It also allows the connection of an additional speaker for monitoring audio sources. Forced ventilation and dual power supplies (220 V AC or 24 V DC) ensure continuous operation in demanding environments.

Main features

• Total power: 120 W into 100 V line or low impedance output (4–8 Ω).
• Tickets:
  • 4× microphone (XLR/jack combo) with selectable +48 V phantom.
  • 1× stereo line (6.3 mm jack).
  • 1× EMC (telephone input).
• Departures:
  • 1× REC (6.3 mm jack).
  • External monitor speaker connector.
• Integrated mixer with independent level controls and 2-band EQ on the output.
• USB/SD module with LCD display for MP3 playback.
• Built-in AM/FM tuner with dedicated external antenna.
• Built-in functions: echo, siren and bell with priority over other signals.
• Forced ventilation by internal fan.
• Dual power supply: 220–240 V AC (50/60 Hz) or 24 V DC.
• 19″ 2U rack format: 484 × 89 × 280 mm; Approximate weight: 11 kg.

Product benefits

• Multi-zone management: Distribute simultaneous audio to up to 4 different areas with line disconnection.
• Call Priority: Microphone 1 and EMC inputs automatically cancel out other signals, ideal in emergencies.
• Connection flexibility: XLR/jack combo connectors and terminals facilitate installation in professional environments.
• Standalone playback: USB/SD and FM/AM radio without the need for an additional external source.
• Sound Control: 2-band equalizer to adjust bass and treble on the main output.
• Continuous reliability: Internal fan and dual power options keep equipment operating without interruption.

Use cases

• Public address systems in corporate buildings, schools, and hospitals.
• Emergency call control in shopping centers and factories.
• Fixed alarm and notification installations in high-traffic areas.
• Background music in shops, restaurants and hotels.
• Voice-over and announcement support at events and auditoriums.

Frequently Asked Questions

• How do I select phantom power?
  Each microphone channel has a switch on the rear panel to activate +48 V.
• Can I use both power supplies simultaneously?
  No, the equipment automatically switches between 220 V AC and 24 V DC depending on availability.
• What reception range does the tuner offer?
  AM: 530–1600 kHz; FM: 87.5–108 MHz.
• Can it be mounted on a standard rack?
  Yes, it takes up 2U of height in a 19″ rack.

Description for projects

19″ 2U 120W rack amplifier for 100V or low impedance line, 4 microphone inputs with +48V phantom, 1 stereo line, 1 telephone EMC, REC, integrated mixer, 2-band equalizer, USB/SD MP3, AM/FM, echo, siren, bell, forced ventilation and AC/DC power supply.