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L18S801 Excelent Sound woofer 18inch Professional Loud Speakers Unit

WOOFER Professional Low Frequency Transducer 4-inch, fibreglass inside-outside copper voice coil 1400 Watt continuous program power handling 99.5 dB Sensitivity 38 Hz - 1 kHz Frequency range "Forced air ventilation and front heat sink for minimum power compression" Dual spider design with silicon based dampening control M-roll surround and exponential cone geometry


Nominal Diameter  18 / 457 inch / mm
Rated Impedance  8 ohm
Program Power  1400 W Watt
Power handling capacity  700 Watt
Sensitivity  99.5 dB
Frequency Range  38 - 1000  Hz
Effective Piston Diameter 380 / 14.96  mm / inch
Max Excursion Before Damage (peak to peak)  40 / 1.57  mm / inch
Minimum Impedance  6 ohm
Voice Coil Diameter  4 / 102  inch / mm
Voice Coil Material  Copper  
Voice Coil Winding Depth 19 / 0.75  mm / inch
Number of layers  2  
Kind of layer  inside/outside  
Top Plate Thickness  10 / 0.39  mm / inch
Cone Material  No pressed pulp  
Cone Design  Curved  
Surround Material  Polycotton  
Surround Design  M-roll  
Magnets Material  Ceramic   
Overall Diameter 460 / 18.11  mm / inch
Bolt Circle Diameter  438 / 17.24 mm / inch
Bolt Hole Diameter 8 / 0.31 mm / inch
Front Mount Baffle Cut-out  416 / 16.38 mm / inch
Rear Mount Baffle Cut-out 418 / 16.46 mm / inch
Depth  187 / 7.36  mm / inch
Volume occupied by the driver  6.5 / 0.26  liters / ft3


A loud speaker, also known as a speaker or speaker system, is an electroacoustic device designed to convert electrical audio signals into sound waves. It is a vital component in audio systems, providing the means to reproduce sound accurately and efficiently across a wide range of applications.

Loud speakers are used in various settings, including home audio systems, professional audio setups, public address systems, and concert venues. They are engineered to deliver high-fidelity sound reproduction with clarity, power, and accuracy.

The key components of a loud speaker include a driver, a diaphragm, a voice coil, and a magnet. The driver is responsible for converting electrical signals into mechanical vibrations, which are then transmitted to the diaphragm. The diaphragm, typically made of lightweight materials such as paper, plastic, or metal, vibrates in response to the electrical signals, generating sound waves. The voice coil, located around the diaphragm, interacts with the magnetic field produced by the magnet, causing the diaphragm to move back and forth rapidly and produce sound.

In home audio systems, loud speakers serve as the primary means of reproducing music and other audio content. Whether it's a compact bookshelf speaker, a floor-standing tower speaker, or a dedicated subwoofer, each loud speaker is carefully designed to deliver specific frequency ranges with optimal accuracy and balance. Home theater systems often incorporate multiple loud speakers strategically placed around the room to create a surround sound experience, immersing listeners in a three-dimensional audio environment.

In professional audio applications, loud speakers play a crucial role in live sound reinforcement, recording studios, and concert venues. These environments demand powerful and reliable loud speakers capable of delivering high SPL (Sound Pressure Level) with minimal distortion. Line arrays, point source speakers, and subwoofers are commonly used configurations in professional audio setups, allowing for precise coverage, even dispersion, and extended low-frequency response.

Public address systems rely on loud speakers to deliver clear and intelligible speech to large audiences. These systems are commonly used in stadiums, airports, schools, and other public spaces where announcements, instructions, or music need to be broadcasted. Horn speakers and column speakers are often employed for their ability to project sound over long distances and provide consistent coverage.

Advancements in loud speaker technology have led to the development of various innovations. Wireless connectivity, Bluetooth compatibility, and smart speaker integration allow users to stream audio wirelessly from their devices. Additionally, the integration of digital signal processing (DSP) technology enables precise control over equalization, time alignment, and other parameters, optimizing the performance of loud speakers in different environments.

In conclusion, loud speakers are essential components of audio systems, enabling the faithful reproduction of sound across a wide range of applications. With their precise engineering, quality construction, and technological advancements, loud speakers continue to evolve, delivering immersive and high-quality audio experiences in both professional and consumer settings.