BST UPA30CD - 30W PA Amplifier with CD Player and USB

BST UPA30CD - 30W PA Amplifier with CD Player and USB

The BST UPA30CD PA amplifier delivers 30W of power into a 100V line or low-impedance (4–8 Ω) input, integrating a voice and music mixer with a CD player and USB. It features two XLR/jack combo microphone inputs with priority on the first, an additional jack microphone input, and an RCA line input. Microphone inputs 2 and 3 incorporate +48V phantom power for condenser microphones. It also features an RCA recording output, built-in siren, and basic equalization function. Power can be supplied from either a 220–240V AC mains supply or a 24V DC battery/UPS. The 2U, 19″ rackmount format allows for tidy cabinet installation. The LCD display makes it easy to monitor the CD and USB players, and its forced ventilation ensures continuous, reliable operation.

Main features

• Output power: 30 W into 100 V or 4–8 Ω
• Microphone inputs:
  • 2x XLR/jack COMBO (priority on Mic 1)
  • 1× 6.3 mm jack (Mic 3)
• Line input: 1× stereo RCA
• Integrated player: CD and USB-MP3 with LCD display
• Recording output: 1× RCA
• Built-in alarm siren
• +48V phantom power on Mic 2 and Mic 3
• 2-band equalizer (bass and treble) on the main output
• Priority system for Mic 1
• 19″ 2U rack format: 320 × 88 × 280 mm, weight 3 kg
• Dual power supply: 220–240 V AC (50/60 Hz) or 24 V DC

Product benefits

• Audio Flexibility: Switch between 100V line voltage and low impedance depending on the installed system.
• Priority Control: The Mic 1 input overrides other signals, ideal for urgent announcements or emergency calls.
• Standalone playback: CD and USB with LCD navigation allow background music without additional equipment.
• Professional connectivity: XLR/jack combo, RCA jacks and speaker terminals make any setup easy.
• Condenser Ready: Phantom +48V on two channels for high-quality microphones.
• Tidy Installation: 2U rack design with forced ventilation for continuous operation.

Use cases

• Public address systems for small and medium-sized facilities: classrooms, multipurpose rooms, offices.
• Playing background music in shops, restaurants and hotels.
• Emergency announcements and sirens in shopping centers or industrial facilities.
• Basic PA equipment for churches and community centers.
• Voiceovers and presentations at conferences and corporate events.

Frequently Asked Questions

• How do I activate Mic 1 priority?
  The front panel includes a switch to enable the Mic 1 mute function over other inputs.
• What formats does the USB port play?
  MP3 from USB devices or SD memory cards (optional adapter).
• Can I use both types of power supply simultaneously?
  No, the equipment automatically switches between 220 V AC and 24 V DC depending on availability.
• How do you adjust bass and treble?
  The 2-band equalizer on the front panel allows for easy boost or cut.

Description for projects

30W in-line 100V or low impedance amplifier, 4-channel mixer with priority on Mic 1, +48V phantom on two channels, CD/USB MP3 player with LCD, siren, REC RCA output, 2-band equalizer, 19″ 2U rack, 220–240 V AC / 24 V DC.