ΣS Series Wood Speaker

ΣS Series Wood Speaker

The Beta Three® ΣS series is a series of compact professional speakers perfectly suited for various portable and installed applications. It is incredibly lightweight and compact, easy to set up and operate, and complemented by its distinct feature of being used as a PA system or a stage monitor. The ΣS series is specially designed for applications including Houses of Worship, banquet halls, nightclubs, ballrooms, and many other venues demanding extraordinary acoustic performance.

ΣS2153 - Dual 15" Two Way Full Range Speaker
ΣS2153 - Dual 15" Two Way Full Range Speaker
ΣS2153 - Dual 15" Two Way Full Range Speaker
ΣS2153 - Dual 15" Two Way Full Range Speaker
ΣS2153 - Dual 15" Two Way Full Range Speaker
ΣS2153 - Dual 15" Two Way Full Range Speaker


Dual 15" Two Way Full Range Speaker

Portable and Installed PA loudspeakers used in applications including sound reinforcement and stage monitoring in Houses of Worship, Events, Clubs,Rehearsal Halls, Ballrooms. Σ Series delivers extraordinary performance at unmatched value. 


  • High SPL and sensitivity

  • 2 x 15” high power low frequency transducer

  • 1 x 3” titanium diaphragm compression driver

  • Drived by one amplifier

  • 60°X40° width direction to get more widely enlarge capability

  • With computer optimize simulated design to get better grquency and phase features

  • Multiple flexible installation methods

  • Suitable for full sound field enlarge, club and dancery etc publics using

  • Suitable for any big sound engineering project or enlarge, returning listen, repair listen of fluxion performance system

  • Used for high quality output replaying music, can be assorted with ΣB115H, ΣB118D, ΣB218 high capacity bass box


Acoustical specifications
Frequency Response(-3db):
Max SPL @ 1m:
Dispersion (H x V):
60° x 40°
Compression driver:
1 x 3" HF Compression Driver
2 x 15" LF
Input/Output section
Input Connectors:
2 x NL4
Sensitivity (1W @ 1m):
Processor section
Crossover frequencies:
Power section
Total Power:
750W(RMS); 1500W(MUSIC); 3000W(PEAK);
Nominal Impedance (Ohm):
Physical specifications
Cabinet/Case Material:
Wedge shape
Speaker stand
2 x Wooden handles
Cabinet coated by Polyurethane paint; grille is powder coated
Dimension (W x D x H):
550 x 660 x 1070mm / (21.7 x 26 x 42.1in)
Package Dimensions (W x D x H):
1185 x 670 x 770mm / (46.7 x 26.4 x 30.3in)
Net Weight:
63 kg / 138.9 lb
Gross Weight:
67.5 kg / 148.8 lb

ΣS2153 Application

    ΣS2153 Installation

      ΣS2153 Parts

        ΣS2153 Cases

          ΣS2153 Collocation



              ΣS2153β3 ΣS2153 Datasheet 1.0ΣS2153  200KB 2022-07-06 16:50:53
              β3_ΣS2153_PA_Chinese_Manualβ3_ΣS2153_PA_Chinese_Manual 1β3_ΣS2153_PA_Chinese_Manual  2935.6KB 2018-07-12 02:25:39
              β3_ΣS2153_PA_English_Manualβ3_ΣS2153_PA_English_Manual 1β3_ΣS2153_PA_English_Manual  2460.54KB 2018-07-12 02:25:39
              β3_ΣS2153II_PA_Chinese_Manualβ3_ΣS2153II_PA_Chinese_Manual 1β3_ΣS2153II_PA_Chinese_Manual  2768.44KB 2018-07-12 02:25:39
              β3_ΣS2153II_PA_English_Manualβ3_ΣS2153II_PA_English_Manual 1β3_ΣS2153II_PA_English_Manual  2561.53KB 2018-07-12 02:25:39