Line Array Series

Line Array Series

The Beta Three® line array series is a series of outstanding rental and touring solutions for live entertainments, sports events, speech reinforcement, and other venues where a line array system is desired. The line array series contains various models consisting of active and passive models for horizontal and vertical deployment complemented by reliable flying equipment. Selected models are also available in the weatherproof version, making them ideally suited for any outdoor application requiring a line array system with state-of-the-art sound performance and optimal scalability.

TLB-121 - Dual 15" Subwoofer Weatherproof Line Array Speaker


Dual 15" Subwoofer Weatherproof Line Array Speaker

T-Line Weatherproof Line Array is composed by a dual 12" full range element TLA-121F and a suspend-able dual 15" subwoofer TLB-121F. Compact construction, light weight and quick installation makes the system most suitable for outdoor touring performance applications.

T-Line Weatherproof Line Array Speakers were designed in accordance with IP54 Standard, mainly be applicable for outdoor touring performance.

The adjacent speakers can achieve the seamless coupling and form the consistent cylindrical wave. The adjustable angle between two adjacent speakers is 0°- 10°. Magnetic circuit of LF is optimized through the finite element analysis to achieve the ultra-low distortion and maximum clarity under the high SPL. Overheated protection for drivers, perfect and reliable circuit protection.

TLB-121F adopts multifunctional structure design and Russian birch, weatherproof polyurethane painting provides super strong weather resistance.



  • Weatherproof(IP46)

  • High SPL and sensitivity

  • 2 x 15" ferrite low frequency transducer

  • 2 x NL4 connectors

  • Trapezoidal cabinet with integrated flywear and locking pins

  • Stainless steel grill

  • Combine with Bate three ® line array TLA121F series high power speaker for extended full range frequency, high quality music reproduction.

  • Computer aided design to optimize frequency and phase response

  • Rigging allows adjustment from 0°- 5°in 1°increment

  • Cabinet constructed by Russian outdoor plywood

  • Durable weatherproof polyurethane textured base paint

  • All terminals are weatherproof


Acoustical specifications
Frequency Response(-3db):
Max SPL @ 1m:
2 x 15" Subwoofer
Input/Output section
Input Connectors:
2 x NL4
Sensitivity (1W @ 1m):
Power section
Total Power:
900W(RMS); 1800W(MUSIC); 3600W(PEAK);
Nominal Impedance (Ohm):
Physical specifications
Cabinet/Case Material:
Birch plywood
4 × Iron handles
Weather resistant polyurethane finish, black powder coating for grille.
Dimension (W x D x H):
965 x 700 x 488mm / (38 x 27.6 x 19.2in)
Package Dimensions (W x D x H):
830 x 570 x 1105mm / (32.7 x 22.4 x 43.5in)
Net Weight:
66.5 kg / 146.6 lb
Gross Weight:
75 kg / 165.3 lb

TLB-121 Application

    TLB-121 Installation

      TLB-121 Parts

        TLB-121 Collocation



            TLB-121β3 TLB-121 Datasheet 1.0TLB-121  200KB 2022-05-22 07:07:24