ΣH Series Wood Speaker

ΣH Series Wood Speaker

The Beta Three® ΣH series consists of a remarkably compact 3-way coaxial professional full-range sound reinforcement system and an 18” subwoofer delivering astonishing low-frequency performance. The ΣH series is suitable for various applications requiring optimal sound performance, especially ideal for music and vocal reproduction. The ΣH series loudspeaker’s performance is further enhanced when paired with the ΣC2600 processor.

ΣH118B - 18" LF Speaker
ΣH118B - 18" LF Speaker


18" LF Speaker

The Beta Three® ΣH118B subwoofer loudspeaker can be used in applications including sound reinforcement for Houses of Worship, Events, Indoor Stadiums, Theme Parks, Multifunctional Auditoriums, Schools, and Transit Terminals etc. These are excellent for live, rental and portable sound reinforcement applications. The ΣH Series loudspeaker delivers extraordinary performance where high speech intelligibility and natural sounding music is required at unmatched value. 


  • 18” LF driver with 100mm voice coil
  • 220mm big magnet system which enables high power handling and reliability, the RMS power is up to 1000W
  • ΣH118B is high SPL and high power bass speaker with folded horn which ensures the bass effect in compact cabinet size, 3dB higher than normal bass reflex bass speaker
  • High intensity plywood cabinet
  • Input and output corresponding design is to avoid the connection error
  • Match with Beta Three ΣH215B bass speaker with ΣC2600 processor for high quality sound reproduction


Acoustical specifications
Frequency Response(-3db):
Max SPL @ 1m:
1 x 18" Subwoofer
Input/Output section
Input Connectors:
4 x NL4
Sensitivity (1W @ 1m):
Power section
Total Power:
800W(RMS); 1600W(MUSIC); 3200W(PEAK);
Nominal Impedance (Ohm):
Physical specifications
Dimension (W x D x H):
550 x 850 x 680mm / (21.7 x 33.5 x 26.8in)
Package Dimensions (W x D x H):
660 x 970 x 780mm / (26 x 38.2 x 30.7in)
Net Weight:
52 kg / 114.6 lb
Gross Weight:
58 kg / 127.9 lb

ΣH118B Application

    ΣH118B Installation

      ΣH118B Parts

        ΣH118B Cases

          ΣH118B Collocation



              ΣH118Bβ3 ΣH118B Datasheet 1.0ΣH118B  200KB 2022-07-05 20:00:31
              β3_ΣH118B_PA_Chinese_Manualβ3_ΣH118B_PA_Chinese_Manual 1β3_ΣH118B_PA_Chinese_Manual  427.61KB 2018-07-12 02:25:39
              β3_ΣH118B_PA_English_Manualβ3_ΣH118B_PA_English_Manual 1β3_ΣH118B_PA_English_Manual  422.09KB 2018-07-12 02:25:39