The LA-4240B is a compact line array speaker designed for both speech and music, featuring four 4” full-range drivers. Complementing it, the LA-150SUB is an active subwoofer with a high-power 15” woofer and advanced digital signal processing, delivering outstanding audio performance with remarkable output stability.
For enhanced portability, the full-range speakers can be detached and conveniently stored within the bass reflex port of the subwoofer, optimizing space efficiency.
When used together, a setup of two LA-4240B speakers and one LA-150SUB subwoofer produces crisp, dynamic sound with deep bass, achieving a high sound pressure level that exceeds comparable systems. Its superior outdoor projection and easy installation make it well-suited for a variety of locations, such as churches, museums, live performance venues, transportation hubs, sports arenas, government buildings, conference spaces, lecture theaters, shopping centers, and AV demonstration rooms.

Model | LA-4240B |
Speaker Unit | 4 × 4" Full-range Drivers |
Rated Power | 280W @ 8Ω / 800W (peak) |
Frequency Range | 100Hz-20kHz |
Sensitivity(1W/1m) | 98dB |
SPL | 120dB (Continuous), 130dB (Peak) |
Nominal Impedance | 8Ω |
Nominal Coverage Angle (H × V) | 120° × 80° |
Crossover Frequency | 120Hz |
Connectors | Two Neutrik NL4 Sockets (1-/1+) |
Enclosure Material | Aluminum Alloy |
Product Dimension(W×H×D) | 125 × 500 × 138mm |
Product Weight | 7.2kg |
Model | LA-150SUB | |
Speaker Unit | 1 × 15" Woofer, 220mm magnet / 100mm voice coil | |
Rated Power | 700W (Continuous), 1600W (Peak) | |
Frequency Response | 32Hz - 300Hz | |
Sensitivity(1W/1m) | 97.5dB | |
SPL | 130dB (Continuous), 136dB (Peak) | |
Nominal Impedance | 8Ω | |
Crossover Frequency | 120Hz | |
Connectors | One Neutrik NL4 Socket | |
Product Dimension(W×H×D) | 500 × 486 × 550mm | |
Product Weight | 35kg | |
Amplifier Module | Power Configuration | 1200W + 800W @ 8Ω |
Frequency Response | 20Hz - 20kHz (-0.5dB at 1/8 Output Power) | |
SNR | ≥101dB (A-Weighted) | |
Damping Factor | 500 | |
Input Sensitivity/Impedance | 1.2V / 22kΩ | |
THD | ≤0.05% | |
Input Voltage | ~190V-240V 50/60Hz | |
Output Circuit Type | Class D | |
Protection Features | Overload Protection, Overvoltage Protection, Undervoltage Protection, Overheat Protection, Short Circuit Protection, DC Protection, etc. | |
DSP Decoder Chip | 96kHz Sampling Rate | |
LA1512S (8Ω) Waterproof Line Array Loudspeaker (4 units combinations)November 29, 2016DSPPA LA1512S Line Array Speaker are full range speaker cabinets with RMS power of 200W and it meets the important need of versatile public address system that can provide high quality reinforcement f...view
LA-4530 LA-4530S Professional Column Array Speaker SystemNovember 1, 2024The LA-4530 full-range speaker utilizes 4×4.5" ferrite full-range drivers with 35mm voice coils and a 25mm dome tweeter, featuring a built-in passive crossover. The 4.5" drivers are equipped with the...view
LA1422S Passive Line Array SubwooferSeptember 21, 2018The LA1422S is a passive line array subwoofer designed with an 800W rated power and an impedance of 8Ω. It features a single 18" driver unit, achieving a maximum SPL of 127±2dB with a sensitivity of...viewwe will contact you within 24 hours.
Wall Mount PA Speakers: Delight Your Ears, Decorate Your LifeNovember 20, 2024Wall mount PA speakers are a type of speaker that can be installed on a wall, typically used to provide surround sound effects or save space. DSPPA wall mount PA speakers are loved for their wonderful...view
Audition of Conference MicrophoneMarch 29, 2019Because of the particularity of the conference room, in most cases, the speaker can not attend the audition (for example, the leader speaks), so just adjust the volume of the normal person. Try to mak...view