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If you have ever been to a concert and felt the music vibrating in your chest, you were feeling the power of a subwoofer. The ZSOUND LC18P-III is a high-performance Active 18-inch Bass Enclosure designed to provide that physical “thump” for clubs, theaters, and touring shows. For those new to professional audio, this unit acts as the strong foundation of your entire sound system.

The “Active” Advantage: Built-in Amplification and Control

What makes this an “Active” system is that the power engine—the amplifier—is built directly into the wooden box. This means you don’t need a separate, heavy rack of external amplifiers to make it work.

• Built-in Amplifier Module: The LC18P-III features a dual-channel 2000W amplifier module. In simple terms, this provides more than enough “muscle” to drive the speaker to its maximum potential without getting tired.
• Integrated DSP: This Active 18-inch Bass Enclosure includes a “brain” called a DSP (Digital Signal Processing).
  • Explanation: DSP is a specialized computer inside the speaker that automatically cleans up the audio signal, prevents the speaker from blowing out, and ensures the sound is perfectly balanced.

Massive Performance: Moving Air with an 18-inch Driver

The heart of this Active 18-inch Bass Enclosure is its massive 18-inch “driver” (the actual circular speaker part that moves back and forth).

• High SPL Capabilities: The LC18P-III can reach a Maximum SPL of 136dB.
  • Explanation: SPL stands for Sound Pressure Level. It is a measurement of how loud a speaker can go. At 136dB, this subwoofer is powerful enough to be heard—and felt—clearly even in large, noisy crowds.
• Deep Frequency Response: This unit can play sounds as low as 28Hz.
  • Explanation: Frequency response measures the “pitch” range. 28Hz is a very low, deep bass note that is often felt more than it is heard, giving your music a rich, professional feel.
• 100mm Voice Coil: The driver uses a 100mm voice coil.
  • Explanation: The voice coil is the coil of wire that turns electricity into movement. A larger coil, like this one, can handle more heat and power, making the speaker last longer during long events.

Touring-Ready Design: Mobility and Integration

ZSOUND designed this Active 18-inch Bass Enclosure to be as easy to move as it is to listen to. Weighing 70kg, it is a sturdy piece of professional gear, but it comes with clever features for transport.

• Wheels and Bumper: The bottom of the cabinet (the protective wooden box) is equipped with wheels and a “bumper”.
  • Explanation: A bumper is a reinforced frame that protects the speaker from bumps and scratches while you are rolling it in and out of a venue.
• Seamless Integration: The LC18P-III is the perfect partner for the ZSOUND LC10 line array. The top of this Active 18-inch Bass Enclosure is designed with a specific “surface” that has space for two LC10 speakers. This allows you to stack your system safely and efficiently, saving space in your truck and on the stage.

Whether you are setting up a permanent system in a church or taking your show on the road, the LC18P-III provides the deep, reliable bass you need in one convenient, powerful package.