Description

Bosch LB20-SW400-D Dual 10″ Black Cabinet Subwoofer for PA and Music Systems


The Bosch LB20‑SW400‑D is a powerful dual 10‑inch subwoofer in a black cabinet, engineered to extend low‑frequency output in public address, background music, or live sound installations. Its robust build and high power handling make it ideal for use with standard amplifiers or PA systems to deliver deep, controlled bass and enhance full‑range audio performance in medium to large venues.

Features of Bosch LB20‑SW400‑D

  • Dual 10″ (250 mm) long‑throw woofers for enhanced bass response
  • High power handling capacity suitable for demanding audio applications
  • Sturdy black cabinet construction for durability and stable mounting
  • Front‑firing configuration for consistent sub‑bass dispersion
  • Low‑frequency extension down to deep bass range for music and PA
  • Compatible with 8 Ω amplifier outputs or constant‑voltage systems (with proper wiring)
  • Compact enough for stage or installation use in clubs, halls, or large rooms
  • Can be used standalone or as part of multi‑speaker systems with mains and high‑frequency cabinets
  • Balanced sound output with minimal distortion at rated power
  • Reliable performance for background music, events, or entertainment systems

Applications of Bosch LB20‑SW400‑D

  • Nightclubs, bars, and entertainment venues
  • Theaters, auditoria, and event halls
  • Large retail outlets and shopping malls
  • Conference rooms, ballrooms, and multipurpose halls
  • Churches, community centers, and public venues
  • Live music or DJ setups requiring strong low‑frequency support
  • Outdoor‑sheltered venues needing deep bass for announcements or music

 

Specifications of Bosch LB20‑SW400‑D

ModelBosch LB20‑SW400‑D
Speaker TypeDual‑woofer cabinet subwoofer
Woofers2 × 10″ (250 mm) long‑throw drivers
Impedance8 Ω nominal
Power Handling (Continuous)200 W RMS (per manufacturer recommendation)
Power Handling (Peak)800 W peak (music/transient bursts)
Frequency Response30 Hz – 250 Hz (approximate sub‑bass range)
Sensitivity (1 W / 1 m)≈ 95 dB (in the sub‑bass range)
EnclosureSealed or ported rugged cabinet — black finish
MountingFloor standing or stage placement
Dimensions (H × W × D)Approx. 550 × 450 × 400 mm
WeightApprox. 22 kg
Use CasesPA systems, live sound, music playback, sub‑bass reinforcement, event sound systems
Recommended Amplifier Power250–400 W per channel at 8 Ω for optimal performance

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