U Series Plastic Speaker

U Series Plastic Speaker

The Beta Three® U series is a series of plastic professional speakers ideally suited for a wide range of portable and installed applications. The U series offers a collection of full-range speakers in various sizes and preferences (passive, active, MP3 player). The U series utilizes a rotatable horn and is highly versatile. It can be used as a main PA or as a stage monitor for sound reinforcement in applications including Houses of Worships, nightclubs, banquet halls, multifunctional halls, and other venues. The optional weatherproof version allows the U series to have optimal performance in both outdoor/indoor applications.

U15a - 15" Two Way Full Range Active Plastic Speaker
U15a - 15" Two Way Full Range Active Plastic Speaker
U15a - 15" Two Way Full Range Active Plastic Speaker
U15a - 15" Two Way Full Range Active Plastic Speaker
U15a - 15" Two Way Full Range Active Plastic Speaker


15" Two Way Full Range Active Plastic Speaker

Portable and installed plastic loudspeakers used in applications including sound reinforcement in Front of House and Foldback applications in Houses of Worship,Events, Clubs, Rehearsal Halls etc. The U Active Series delivers extraordinary performance at unmatched value. 


  • High output SPL and sensitivity
  • 1 x 15” high power transducer with 50mm voice coil
  • 1 x 1.7” diaphragm compression driver
  • Rotatable Horn: 50º-100º x 55º controlled coverage pattern
  • Built-in Bi-amp power amplifier module
  • Master volume control
  • Bass and Treble control
  • XLR input and output connectors
  • Switchable between Mic and Line input
  • Heavy duty protective grill
  • Injection molded
  • 2 x XLR connector
  • Cabinet design for FOH and Monitor use
  • Suitable for use as a main system with or without sub speaker augmentation
  • Portable system (stand), or permanent installation (wall, ceiling)
  • Arrays with all active high power U Series sub speakers for extended low frequency, high quality music reproduction
  • Monitor kit - optional


Acoustical specifications
Frequency Response(-3db):
Max SPL @ 1m:
Dispersion (H x V):
50-100° x 55°
Compression driver:
1 x 1.7" HF
1 x 15" LF
Input/Output section
Input signal:
Balanced 20kΩ, Unbalanced 10kΩ
Input Connectors:
2 x XLR
Power section
Total Power:
300W(RMS); 600W(MUSIC); 1200W(PEAK);
Nominal Impedance (Ohm):
Voltage range:
Physical specifications
Cabinet/Case Material:
Polypropylene injection moulding
8 x M8 hanging point, SMART pole mount system
Two side, one rear
Powered coated grill
Dimension (W x D x H):
485 x 460 x 700mm / (19.1 x 18.1 x 27.6in)
Package Dimensions (W x D x H):
545 x 515 x 800mm / (21.5 x 20.3 x 31.5in)
Net Weight:
30.5 kg / 67.2 lb
Gross Weight:
33.7 kg / 74.3 lb

U15a Application

    U15a Installation

      U15a Parts

        U15a Collocation



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