JBL VT4881ADP 18" Powered Compact Arrayable Subwoofer with Standard dbx Input Module, Integrated Audio System

The VT4881ADP is a lightweight, vented sub-woofer enclosure housing one Ultra-Long Excursion 18" woofer and a JBL DrivePack DP1 fully integrated power and DSP electronics package . The JBL DrivePack, developed in cooperation with Crown and dbx, brings leading-edge technology to the VERTEC DP Series including patented high efficiency Class-I power amplifier technology and onboard digital signal processing. This provides not only unmatched audio quality and performance but also onboard DSP functionality that communicates readiness and operational status to the user and monitors fault detection of components and electronics.

A new Ultra Long Excursion 18" VLF component, fitted with dual voice coils and Ultra Robust composite cone provides high output capabilities with an advantageous power-to-weight ratio. Enclosure features: foam-back perforated steel grille; speaker cone treated with weather-resistant compound; rigging tubes and hinge bars made from premium-grade alloy aluminum; plated hinge pins; stainless steel quick-release pin restraining lanyards; and inter-locking rubber feet which allow vertical stacking of multiple inter-locking units, including reverse ground-stacking for cardioid subwoofer array applications if desired. VT4881ADP rigging hardware relies on quick-release pins and end-mounted metal frames to couple adjacent units together in rigid but flexible arrays.

• New 2269G Advanced Technology Component: Differential Drive Neodymium Magnet, Dual Voice Coil, Direct Cooled cone transducer with Ultra-Long Excursion capabilities
• JBL DrivePack technology delivers superb audio quality and robust high efficiency Class-I power, perfectly matched to the enclosure, with comprehensive digital signal processing. Modular bay accepts standard dbx or optional Crown, networked input modules
• World-wide AC line voltages are automatically selected for 50 or 60Hz
• Advanced construction techniques using JBL PlyMax provide exceptionally rigid, lightweight enclosure
• Rugged DuraFlex exterior finish; Weatherized loudspeaker cone
• Integrated S.A.F.E suspension system: premium heat-treated alloys provide rigid, reliable hanging arrays designed for vertical orientation at various angles.

Application
The VT4881ADP Compact Powered 18" Arrayable Subwoofer is designed to deliver high quality sound reinforcement of VLF (Very Low Frequency) musical information for a variety of applications including concert audio, corporate A/V and theatrical presentations of all types. Ideal companion to VT4887ADP compact three-way systems.

JBL DrivePack input modules are used to implement crossovers, equalization, time alignment and protection for the attached speaker system. Speaker-dependent settings are not user-configurable from any version of the input module. The following options are available for connectivity, audio signal path and control functionality.

DPIP (Standard dbx Input Module)
JBL DrivePacks are equipped with a modular input bay and are available in several versions. The standard DPIP input module features analog audio inputs and sophisticated onboard digital signal processing technology. Precision bandpass limiting, pre-equalization filters and automatic self-test functions ensure optimized performance. Front panel controls include a 32-position detented rotary attenuator calibrated in 0.5dB steps which provides a 16dB range of control.

This can be useful for setting up downfill shading or overall system gain structuring. Another feature is the "Enable Subwoofer Filter" button. This is a momentary-contact type switch which enables or disables the selected function. On subwoofer applications, the low-pass frequency is set to 80Hz. For full-range systems used with subwoofers, the high-pass is raised to 80Hz.