JBL VT4880 Dual 18" Arrayable Subwoofer, 8000W Peak Power, 26 Hz - 80 Hz Bandpass

The JBL VT4880 is a rugged, lightweight, centrally-vented enclosure housing two 18" woofers. These advanced components, each fitted with dual voice coils, provide a high output power-to-weight ratio. The PlyMax enclosure features: foam backed perforated steel grille; speaker cones treated with weather-resistant compounds. Protective end-caps safeguard the suspension hardware while allowing vertical stacking of multiple enclosures on end using integral end-mounted, scuff-resistant pads, keyed for aligning surfaces and preventing slippage.

VerTec suspension systems are engineered for maximum support strength and flexibility. The VT4880's suspension hardware (same as the full range VT4889) relies on quick-release pins and end-mounted metal frames to couple adjacent units together in rigid arrays. Suspension frames are made from premium-grade chromoly alloy steel with plated surfaces; hinge bars are plated and quick-release pin restraining lanyards are stainless steel to resist corrosion.

The low-frequency capabilities of a multi-enclosure VT4880 array will be determined by the total number of units coupled. The directivity of a subwoofer line array at any given frequency is proportional to the product of frequency and length of the array. The beam-width will be inversely proportional to the product of the array's length and the frequency of interest, typically 20-80 Hz for subwoofer applications. The more subwoofer elements that are used in the array, the greater directivity will be at lower frequencies, enabling better pattern control. Medium to large arrays can generate extreme amounts of sub-low frequency energy.