JBL VT4883 User Manual

Subcompact Dual 12"
Cardioid-Arrayable

VT4883

VERTEC®Series

Application:

The VT4883 Subcompact Dual 12" Cardioid­Arrayable Subwoofer Line Array Element is a
companion low frequency extension for the
VT4886 subcompact 3-way enclosure.
Designed to deliver high quality sound
reinforcement of sub-low frequencies for a
wide variety of live music and A/V support
applications, typical uses include concert
audio and multi-media presentations of all
types.

Key Features:

䉴

Advanced Technology Components:
Differential Drive
Neodymium Magnets, Dual Voice Coils,
Direct Cooled™

䉴

Reverse-arrayable for implementation of
gradient cardioid subwoofer configurations

䉴

JBL PlyMax®engineered wood materials
provide rigid, yet lightweight enclosure

䉴

Rugged DuraFlex™ exterior finish;
weather-resistant components

䉴

Patented, integrated S.A.F.E.™ suspension
system with premium heat-treated alloys

The VT4883 is a subcompact subwoofer

housing two 12" long-excursion, Differential

®

Drive

low-frequency transducers. These
advanced components, each fitted with dual
voice coils and dual magnets, provide an
exceptionally high output power-to-weight
ratio.

The PlyMax
vented bandpass topology with optimized
component density and minimal footprint;
large area corner ports with laminar flow
design for reduced turbulence noise and
optimized linearity; integral rubber feet,
keyed for aligning surfaces and preventing
slippage of stacked systems; pole mount
socket for use with optional extension rod.

V

ERTEC suspension systems are engineered

for maximum support strength and flexibility.
The VT4883’s suspension hardware relies on
quick-release pins and side-mounted
suspension tubes to couple units together in
rigid arrays, either front-firing or rear-firing
for implementation of gradient cardioid
configurations.

Suspension tubes are made from premium­grade heat-treated aluminum, hinge bars are
plated high tensile steel and quick-release
pin restraining lanyards are plastic-coated
stainless steel to resist corrosion.

Subwoofer Line Arrays:

The low-frequency capabilities of a multi­enclosure VT4883 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 beamwidth 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.

®

, technology, Dual

®

enclosure features: unique

Subwoofer

Specifications:

System

Frequency Range (-10 dB): 35 Hz - 300 Hz

Frequency Response (±3 dB): 40 Hz - 300 Hz

Recommended Bandpass: 35 Hz - 200 Hz

System Input Power Rating: 2000 W Continuous, 8000 W Peak (AES / 2 hour)

System Sensitivity: 95 dB, 1 W (per driver) @ 1m (averaged 40 - 140 Hz)

Maximum Peak Output

Recommended Amplification: (2 x) 1600 - 2000 W into 8 ohms (transducers powered individually)

Recommended Signal Crown

Transducers

Enclosure

Shipping Dimensions (W x H x D): 584 mm x 457 mm x 699 mm

Optional Accessories

1

Calculated maximum SPL based on rated peak power and measured sensitivity

2

AES Standard, one decade pink noise with 6 dB crest factor within device's operational band, free air. Standard AES 2 hr
rating plus long term 100 hr rating.

JBL continually engages in research related to product improvement. Some materials, production methods and design
refinements are introduced into existing products without notice as a routine expression of that philosophy. For this
reason, any current JBL product may differ in some respect from its published description, but will always equal or
exceed the original design specifications unless otherwise stated.

Cabinet Construction: Rectangular enclosure. PlyMax™ engineered wood composite structure,

Dimensions (H x W x D): 398 mm x 579 mm x 643 mm

Processing: Audio™ FDS-366T Omnidrive™, BSS Audio Soundweb™ London

Low Frequency: 2 x 2263H-1, 305 mm (12 in) dia., 75 mm (3 in) Dual Coil, Dual

Nominal Impedance: 2 x 8 ohms

Input Power Rating 1000 W Continuous, 4000 W Peak (AES / 2 hour)

(each transducer)2: 800 W Continuous, 3200 W Peak (100 hour)

Suspension System: Patented S.A.F.E.™ hardware, integral hinge bars nest in suspension

Input Connectors: Rear panel: Neutrik

Net Weight: 29.5 kg (65 lbs)

Shipping Weight: 35.4 kg (78 lbs)

VT4886-AF Array frame for suspension of VT4883, VT4886, or mixed

VT4886-AB Adapter bar for attachment of multiple VT4886-AF array frames

SS4-BK2 Adjustable extension rod with M20 thread for attachment to VT4883,

1600 W Continuous, 6400 W Peak (100 hr)

1

: 139 dB SPL, 1m (2␲, half-space, ground-based application)

133 dB SPL, 1m (4␲, free-space, suspended application)

3200 - 4000 W into 4 ohms (transducers powered in parallel)

®

I-Tech HD, Crown I-Tech, dbx®DriveRack®4800, BSS

Magnet, neodymium Differential Drive®, Direct Cooled™

DuraFlex™ finish, 4 handles, integral pole mount adapter (M20 thread)

tubes on enclosure sides. Quick release pins with restraining lanyards.
Set of 4 hinge bars included. Reverse-arrayable for gradient cardioid
configurations. Suspend with VT4886-AF Array Frame.

Grille: Black perforated steel, foam backed

Front panel: Neutrik®Speakon®NL-4 (1x) for gradient cardioid
configurations. All connectors in parallel, internal wiring; transducers
circuited individually 1±, 2± (2 x 8 ohm) (NL4 and NL8)

(15.7 in x 22.8 in x 25.3 in)

(23" x 18" x 27.5")

VT4883/VT4886 arrays. Can also be used for ground stacking.

hand crank height adjustment and patented expanding mandrel system
for secure, vibration-free attachment of optional VT4886-UB accessory
and up to 3x VT4886

®

Speakon®NL-4 and NL-8 (2x each)

䉴 VT4883 Subcompact Dual 12" Cardioid-Arrayable Subwoofer

20 100 1000 10000 20000

Frequency (Hz)

50

60

70

80

90

100

SPL (dB)

11.8 [300]

21.3 [541]

15.7 [398]

15.4 [392]

25.1 [637]

25.3 [643]

22.8 [579]

15.6 [397]

9

Processed VT4883 frequency response

(140 Hz LPF,80 Hz LPF)

100

10

Impedance (Ohms)

1

20 100 1000 10000 20000

VT4883 electrical input impedance

2263H-1 Long Excursion 305 mm (12") Transducer

• Dual Neodymium Magnets

• Dual 75 mm (3") diameter, 1.1" winding length voice coils

• Vented Gap Cooling™

• Ultra Robust Composite Cone

• Thermoset Fiberglass Composite Voice Coil Former

• Edgewound Aluminum Voice Coils

• Heavy Duty Suspension for High Excursion and Enhanced
Durability

• 25 mm (1") Peak-to-Peak Maximum Excursion

• 1000 W cont, 4000 W peak (AES) Power Handling, each
transducer

Frequency (Hz)

Flown cardioid configurations (3x VT4883 + 6x VT4886)

The VT4883 can be used in suspended arrays of multiple units
or combined with VT4886 line array elements in the same
array. Pictured above is a VT4886-AF supporting three VT4883
subwoofers in a gradient cardioid configuration over six VT4886
subcompact line array elements. Ground stacked configurations
are shown below

Dimensions in inches (mm)

JBL Professional
8500 Balboa Boulevard, P.O. Box 2200
Northridge, California 91329 U.S.A.

A Harman International Company

© Copyright 2010 JBL Professional

www.jblpro.com

SSVT4883
CRP
01/10