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-121F - Dual 15" Subwoofer
TLB-121F - Dual 15" Subwoofer


Dual 15" Subwoofer

The Beta Three® TLA-121 is a medium to large sized weatherproof line array loudspeaker that 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 TLA Series line array loudspeaker delivers extraordinary performance where high speech intelligibility and natural sounding music is required at unmatched value. 


  • 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 @ 1+ 2-
Sensitivity (1W @ 1m):
Power section
Total Power:
900W(RMS); 1800W(MUSIC); 3600W(PEAK);
Nominal Impedance (Ohm):
Physical specifications
Cabinet/Case Material:
Birch plywood
4 x 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-121F Application

    TLB-121F Installation

      TLB-121F Parts

        TLB-121F Cases

          TLB-121F Collocation



              TLB-121Fβ3 TLB-121F Datasheet 1.0TLB-121F  200KB 2022-07-05 08:16:34
              β3_TLB-121F_PA_Chinese_Manualβ3_TLB-121F_PA_Chinese_Manual 1β3_TLB-121F_PA_Chinese_Manual  1838.84KB 2018-07-12 02:25:39
              β3_TLB-121F_PA_English_Manualβ3_TLB-121F_PA_English_Manual 1β3_TLB-121F_PA_English_Manual  1633.89KB 2018-07-12 02:25:39