TW Series Wood Speaker

TW Series Wood Speaker

The Beta Three® TW series is a series of professional speakers perfectly suited for a wide range of portable and installed applications. It is designed to work with ease and high efficiency. The TW series is capable of cutting through the loudest of stage backgrounds for a clear vocal and musical performance. With its distinctive design, the TW series can be used as a PA system or a stage monitor.

TW118Ba - 18" Active Subwoofer


18" Active Subwoofer

β3 TW118Ba is a brand new design subwoofer in TW family. It adopts one 18" LF woofer, built-in crossover and single channel amplifier. 4" voice coil with round copper wire and Aluminium bobbin delivery 500W power, symmetrical magnet circuit design reduce the impar HD effectively and enhance the LF sound quality.

Cabinet is made of 18mm birch plywood with advanced environmental protection Polyurethane-based painting which is very rigid. The cabinet strength reach to 4500N. The 35mm flange can be used to support full range speaker. 

Q235 grille is coated by powder to provide strong ultra-Weatherability, can be used outdoors for 5 years. The backside foam of grille can prevent the rain.

TW118Ba is a protection free design, which reduce the interfere and enhance the sound quality. 

TW118Ba can be used with MU series together to meet the application in conference room, multifunctional hall, small auditorium, church, living performance, etc. 



  • Single 18" active phase inverted subwoofer.

  • Built-in 500W/4ohm power amplifier with high-cut.

  • One input and one output.

  • 500W woofer with 4" voice coil.

  • Built-in crossover make the sound very natural. 

  • Powder coated grille can be used for 5 years outdoors, backside foam of grille prevent the rain. 

  • Advanced paint materials and the painting technology make the surface very rigid. 

  • The sound is very clean, powerful and stretchy.


Acoustical specifications
Frequency Response(-3db):
Max SPL @ 1m:
1 x 18" Woofer
Input/Output section
Input signal:
Balanced 20kΩ, Unbalanced 10kΩ
Input Connectors:
Power section
Total Power:
Nominal Impedance (Ohm):
Voltage range:
AC 220V-240V~50/60Hz
Physical specifications
Cabinet/Case Material:
18mm Plywood
4 x Wooden handles
Powder coated grill
Dimension (W x D x H):
680 x 780 x 530mm / (26.8 x 30.7 x 20.9in)
Package Dimensions (W x D x H):
885 x 795 x 660mm / (34.8 x 31.3 x 26in)
Net Weight:
46.5 kg / 102.5 lb
Gross Weight:
51 kg / 112.4 lb

TW118Ba Application

    TW118Ba Installation

      TW118Ba Parts

        TW118Ba Cases

          TW118Ba Collocation



              TW118Baβ3 TW118Ba Datasheet 1.0TW118Ba  200KB 2022-05-22 01:56:04
              β3_TW118Ba_PA_Chinese_Manualβ3_TW118Ba_PA_Chinese_Manual 1β3_TW118Ba_PA_Chinese_Manual  1204.14KB 2018-07-12 02:25:39
              β3_TW118Ba_PA_English_Manualβ3_TW118Ba_PA_English_Manual 1β3_TW118Ba_PA_English_Manual  971.26KB 2018-07-12 02:25:39