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The 18-400B 18-Inch Replacement Loudspeaker is a high-power, commercial-grade low-frequency transducer engineered to deliver deep, rumbling sub-bass reinforcement and heavy acoustic punch to professional PA subwoofers, bass bins, and large-format sound reinforcement cabinets.
Rated at an authoritative 400 watts RMS, this heavy-duty 18-inch driver serves as an essential drop-in replacement utility for live sound engineers, mobile DJs, touring bands, and rental audio production benches.
It replaces burned-out, torn, or fatigued sub-bass drivers instantly, saving production teams from the high expense of replacing full cabinet enclosures.
Operating as a highly efficient low-frequency driver, the loudspeaker features a robust pressed steel chassis paired with a high-temperature 3-inch voice coil wound on a resilient former.
This structural framework ensures the speaker handles intense thermal loads and prolonged high-volume stress without suffering from power compression or voice coil warping.
Its specialized treated paper cone and multi-roll cloth surround are optimized to move massive columns of air, delivering tight, punchy low-end transients and extended sub-bass frequencies that add raw physical impact to live music and dance venue audio layouts.
Features
High-Efficiency 400W RMS Continuous Power Handling: Built to manage 400 watts of continuous RMS power safely.
This high power rating provides the thermal headroom necessary for demanding live venue reinforcement and multi-hour DJ events.
Premium Pressed Steel Chassis Construction: Formed from a high-gauge structural steel frame that resists warping and mechanical distortion.
This rigid basket geometry maintains perfect internal component alignment under heavy acoustic loads.
Large 3-Inch High-Temperature Voice Coil: Wound with precision wire around an advanced thermal former.
This oversized design dissipates heat rapidly, protecting the component from thermal failure during long, high-volume operations.
Optimized Sub-Bass Paper Cone and Cloth Surround: Features a lightweight, stiff paper cone coupled with a durable multi-roll treated cloth surround.
This specialized combination delivers rapid transient response and deep sub-bass reproduction while eliminating cone flexing.
Universal Drop-In 18-Inch Form Factor: Standardized mounting bolt holes provide effortless compatibility with a wide array of pro audio brands.
It drops perfectly into standard bass-reflex cabinets, folded horn enclosures, and passive bass bins.
Cost-Efficient Sound System Maintenance: Designed as a heavy-duty single replacement component.
This standalone driver availability allows rental companies and school AV groups to repair single damaged subwoofers affordably and keep their inventory running.
Specifications
Component Type: Professional Low-Frequency Sub-Bass Replacement Transducer
Model Designation: 18-400B High-Output Series
Nominal Basket Diameter: 18 inches (457 mm)
Continuous Power Handling: 400 Watts RMS
Nominal System Impedance: 8 Ohms Standard Operational Load
Primary Application: Replacement low-frequency driver for active and passive subwoofer cabinets, portable DJ bass bins, compact club sub-bass enclosures, and custom venue sound installations
What’s in the Box
1 x 18-400B 18-Inch 400W RMS Replacement Loudspeaker Driver
