JBL VT4880A Ultra Long Excursion Dual 18" Arrayable Subwoofer, 16000W Peak Power, 25 Hz - 80 Hz Bandpass

The JBL VT4880A is a high-performance subwoofer offering extended low-frequency reproduction capabilities in the foundation octave at lowest audible frequencies. The centrally vented enclosure features two 2269H 18" Ultra Long Excursion transducers fitted with dual voice coils to 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 VT4880A'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 the multi-enclosure VT4880A array will be determined by the total number of units coupled. The directivity of a 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.