JBL VerTec VT4880 Instructions for use

Array Applications Manual
For models VT4889, VT4888, VT4887, VT4881, VT4880

Page 2
TABLE OF CONTENTS
PAGE
GENERAL AMPLIFICATION NOTES & REQUIREMENTS…………………. 3
SUBWOOFER WIRING NOTES………………………………………………… 4
STANDARD AMPLIFICATION RACK
LIMITER SETTINGS NOTES …………….……………………………..…….. 5
VT4887 & VT4881
TRANSDUCER COMPLEMENT.………………………………….…….. 5
AMPLIFIER CONFIGURATION OPTIONS
VT4887 & VT4881 ARRAY WIRING……………………………………………. 7
VT4888
TRANSDUCER COMPLEMENT………………………………………… 8
AMPLIFIER CONFIGURATION OPTIONS
VT4888 ARRAY WIRING………………………………………………………... 10
VT4889
TRANSDUCER COMPLEMENT………………………………………… 11
AMPLIFIER CONFIGURATION OPTIONS
VT4880 TRANSDUCER COMPLEMENT & AMPLIFIER CONFIGURATION.. 12
VT4889 ARRAY WIRING ……………….…………………………………….. 13
VERTEC SYSTEMS SUSPENSION HARDWARE
AND ASSEMBLY NOTES………………………………………………… 14
PARTS GUIDE: VERTEC SYSTEMS SUSPENSION HARDWARE……………. 15
VERTEC VT4888, VT4887, VT4881: SYSTEM SUSPENSION FRAMES……… 16
VERTEC: SYSTEM SUSPENSION HINGE BARS………………………………. 17
PICTURE: VT4889 WITH VT4887 HANG UNDER USING VT4800-DA….…... 18
PICTURE: VT4887 CLUSTER SUSPENDED USING VT4887-AF……………… 19
VERTEC SUPPORT TEAM AND WEBLINKS…………………………….…….. 20

Page 3
GENERAL AMPLIFICATION NOTES & REQUIREMENTS
• For the purpose of this discussion: Crown MA series amplifiers are used below. HF
indicates High Frequency drivers, MF indicates Mid Frequency drivers, LF indicates
Low Frequency drivers and VLF stands for Very Low Frequency drivers (subwoofers).
• Equivalent amplifiers can be used as substitutions.
• Users should observe differences in input sensitivity and maximum available power at a
given impedance load.
• Users may choose to use the same size amplifier to power all components / passbands.
• DSP crossover presets provided by JBL assume that the same amplifier models with
equal voltage gain, are used for each bandpass.
• If different gain settings or amplifiers models are used, users may need to adjust the
output gains of the digital controller(s).
VT4889
• 4 VT4889 can be powered with (4) MA-3600, although the MA-5002 is recommended.
 Two boxes are wired in parallel per NL8 circuit.
 (HF: CH1 & CH2, MF: CH1 & CH2, LO1: CH1 & CH2, LO2: CH1 & CH2)
• Using MA-5002’s would provide enough power to drive up to 6 VT4889.
 Three boxes are wired in parallel per NL8 circuit.
• MA-2402 or MA-3600 can be used for the HF section to power 2 or 3 boxes.
VT4888
• 4 VT4888 can be powered with (4) MA-3600, although the MA-5002 is recommended.
 Two boxes are wired in parallel per NL8 circuit.
 (HF: CH1 & CH2, MF: CH1 & CH2, LO1: CH1 & CH2, LO2: CH1 & CH2)
• Using MA-5002’s would provide enough power to drive up to 6 VT4888.
 Three boxes are wired in parallel.
• MA-2402 or MA-3600 can be used for the HF section to power 2 or 3 boxes.
VT 4887
• 4 VT4887 can be powered with one (1) MA-5002.
 If four boxes are wired in parallel per NL8 circuit then
CH1: LF @ 2 ohms & CH2: MH/HF @ 2 ohms.
• MA-2402 or MA-3600 or MA-36x12 can be used if 2 boxes are wired in parallel instead.
VT4880
• 2 VT4880 are usually wired to (1) MA-3600 or (1) MA-5002.
 If two boxes are wired in parallel using NL4 cables then
CH1: 2258 left, pin 1+ @ 4 ohms & CH2: 2258 right, pin 2+ @ 4 ohms.
• Up to 3 boxes could be wired in parallel with loads of 2.7 ohms per amp channel.
VT4881
• 2 VT4881 are usually wired to (1) MA-3600 or (1) MA-5002.
 If two boxes are wired in parallel using NL8 cables then
CH1: 2256G coil 1, pin 1+ @ 4 ohms & CH2: 2256G coil 2, pin 2+ @ 4 ohms.
• Up to 3 boxes could be wired in parallel with loads of 2.7 ohms per amp channel.
• Make parallel connections at amplifier rack to minimize cable losses.

Page 4
NOTES ON SUBWOOFER WIRING
• VT4880: Users may choose to wire both 2258 (18”) components in parallel to one (1)
channel of a MA-3600 or MA-5002 for (4) ohms load. In this case each amplifier
channel drives one VT4880. If two VT4880 are wired in parallel, the load is two ohms
and there will be no amplifier power headroom.
• VT4881: Users may choose to wire both coils in a single 2256G component in parallel to
one (1) channel of a MA-3600 or MA-5002 for (4) ohms load. In this case each amplifier
channel drives one VT4881. If two VT4881 are wired in parallel, the load is two ohms.
USERS MUST NOT WIRE THE VOICE COILS ON A 2256G (VT4881) OUT OF
POLARITY TO EACH OTHER.
NL8: PIN 1 + = RED CONNECTOR A & BLACK CONNECTOR A
NL8: PIN 2 + = RED CONNECTOR B & BLACK CONNECTOR B
STANDARD AMPLIFICATION RACK
For those users looking to minimize amplifier rack configurations, one rack with 4 MA-5002
and 2 NL8 output circuits can power up to:
• 4 to 6 VT4889 (2 or 3 boxes per circuits AMPS: HF, MF, LF1, LF2)
 OR
• 4 to 6 VT4888 (2 or 3 boxes per circuits AMPS: HF, MF, LF1, LF2)
 OR
• 8 VT4887 & 4 VT4881
 (4 VT4887 & 2 VT4881 per circuit AMPS: MF/HF, LF, VLF1, VLF2)
This rack would use the same input signal path from the digital controller of choice. Users
would only need to recall the appropriate DSP file on the unit.
• VT4889 or VT4888
 DSP outputs: LO, MID, HIGH (stereo)
• VT4887 & VT4881
 DSP outputs: SUB, LO, MID/HIGH (stereo)

Page 5
NOTES REGARDING LIMITER SETTINGS
• The recommended limiter threshold settings provide 3 dB of headroom before the
component or bandpass peak voltage is reached.
• The component or bandpass peak voltage is 6 dB above the voltage used at
continuous maximum power.
• These settings assume the use of a Crown MA-5002 in stereo mode with input
sensitivity of 1.4V for a voltage gain of 37 dB. Amplifier limiter and Offset
Integration switches are set to the off position.
• If a different amplifier is used or if the input sensitivity is changed, the limiter
threshold must be re-calculated.
• Not all DSP controllers behave the same way. Please study your unit accordingly.
• Users must take into consideration that the digital controller gain outputs are not
all “0” dB, i.e. for VT4889/4880, the VLF is at +6 dB, the LF is at 0 dB, the MF is
at -2.5 dB and the HF is at - 4 dB. Hence, the actual headroom before limiter
threshold is effectively greater than it may seem from the above charts.
• Users should carefully test these settings, and lower or raise the thresholds for a
given type of program material as required.
VT4887 & VT4881 Transducer Complement:
Model Speakon NL8
Terminals
Per
box
Nominal
Impedance
per
Transducer
Nominal
Impedance
per
Passband
AES Power
100 HR
Rating per
Transducer
Peak
Power
Rating per
Transducer
Recommended
Power per
Passband
HF 2407H Pins 4± 1x 2 8Ω 8Ω 25W 100W 450W
MF 2104H Pins 4± 1x 4 8Ω8Ω50W 200W 450W
LF 2168J Pins 3± 2x 2 16Ω 8Ω 350W 1400W 1000W
VLF 2256G Pins 1± & 2± 3x 1 2 x 8Ω8Ω+ 8Ω600W 2400W 1200W
1PASSIVELY CROSSED OVER MID/HIGH FREQUENCY SECTION.
2LF SECTION HAS TWO 8” COMPONENTS WIRED IN PARALLEL.
3SINGLE COMPONENT WITH TWO VOICE COILS INDEPENDENTLY WIRED.

Page 6
Amplifier Configurations: 4 x VT4887 & 2 VT4881 / 3 MA-
5002
Amplifier
Channel
Speakon NL8
Terminals Driving
Nominal
Impedance
at Pins
Amplifier Power
Rating at
Nominal
Impedance
Power
Available to
each
Bandpass
Bandpass
Peak
Voltage
Vac
Limiter
Threshold
dBu
Pins 4±
4 x 2407H
& 8 x 2104H 4Ω 1800W 900W 54V -3
Ch 1.
MA-5002VZ
Ch2.
Pins 4±
4 x 2407H
& 8 x 2104H 4Ω 1800W 900W 54V -3
Pins 3± 4 x 2168J 4Ω 1800W 900W 134V 4
Ch 1.
MA-5002VZ
Ch2.
Pins 3± 4 x 2168J 4Ω 1800W 900W 134V 4
Pins 1± & 2± 1 x 2256G 4Ω 1800W 900W 86V -2*
Ch 1.
MA-5002VZ
Ch2.
Pins 1± & 2± 1 X 2256G 4Ω 1800W 900W 86V -2*
* 6 dB of headroom required for extended bandpass.
Amplifier Configurations: 4 x VT4887 & 2 VT4881 / 3 MA-
3600
Amplifier
Channel
Speakon NL8
Terminals Driving
Nominal
Impedance at
Pins
Amplifier Power
Rating at
Nominal
Impedance
Power Available
to each
Bandpass
Bandpass
Peak
Voltage
Vac
Limiter
Threshold
dBu
Pins 4±
4 x 2407H
& 8 x 2104H 4Ω 1120W 560W 54V -3
Ch 1.
MA-3600 VZ
Ch2.
Pins 4±
4 x 2407H
& 8 x 2104H 4Ω 1120W 560W 54V -3
Pins 3± 4 x 2168J 4Ω1565W 783W 134V 4
Ch 1.
MA-3600 VZ
Ch2.
Pins 3± 4 x 2168J 4Ω1565W 783W 134V 4
Pins 1± & 2± 1 x 2256G 4Ω 1565W 1565W 86V 1
Ch 1.
MA-3600 VZ
Ch2.
Pins 1± & 2± 1 X 2256G 4Ω 1565W 1565W 86V 1
EASY: 1 X MA-3600 = 2 VT4887
1 X MA-3600 = 2 VT4881

Page 7
IMPORTANT NOTES:
All wiring configurations shown above use 8-conductor speaker cables terminated with Neutrik NL8 "Speakons".
Ensure that each conductor in the cable is a minimum of #13 AW (3-4 mm).
JBL VT4887:
The MF & HF section of a VT4887 has an internal passive crossover network. =8ΩPins 4±
This network connects two 2407H HF drivers (8Ω) wired in series
and four 2104H MF (8Ω) wired in Series / Parallel.
The LF section of a VT4887 has two 2168J drivers (16Ω) wired in Parallel. =8ΩPins 3±
JBL VT4881:
The single 15" 2256G VLF device has two 8Ωcoils wired independently. =8Ω/8ΩPins 1±, 2±
(2) MA-5002VZ
Power Amplifiers
JBL V erT e c V T 4887 w i th V T 4881
PowerAm plifierconfigurations - 4 +2 Box A rray
NL8
SINGLE
Cable
NL8
Jumper
Cable
VT4881
VT4887
CH-1
Pin 3 ±
4887-LF
4 Ω
2Ω
4Ω
2Ω
CH-2
Pin 4 ±
4887-MF/HF
CH-1
Pin 1±
4881-VLF
CH-1
Pin 2±
4881-VLF
Crown
MA-5002VZ
Crown
MA-5002VZ
Crown
MA-5002VZ
Crown
MA-5002VZ

Page 8
VT4888 Transducer Complement:
Model
Speakon
NL8
Terminals
Per
box
Nominal
Impedance
per
transducer
Nominal
Impedance
per
Passband
A
ES Power 100
HR Rating per
Transducer
Peak Power
Rating per
Transducer
Recommended
Power per
Passband
HF 2431H Pins 4± x 2 8Ω 16Ω75W 300W 300W
MF 2106H Pins 3± x 4 8Ω8Ω100W 400W 800W
LF 2262H Pins 1± & 2± x 2 8Ω8Ω+ 8Ω700W 2800W 2500W
Amplifier Configurations: 4 VT4888 / 3 MA-5002VZ
Amplifier
Channel
Speakon NL8
Terminals Driving
Nominal
Impedance
at Pins
Amplifier Power
Rating at
Nominal
Impedance
Power Available
to each
Component
Bandpass
Peak
Voltage
Vac
Limiter
Threshold
dBu
Pins 4± 4 x 2431H 8Ω1300W 325W 56V -3
Ch 1.
MA-5002VZ
Ch2.
Pins 4± 4 x 2431H 8Ω1300W 325W 56V -3
Pins 3± 8 x 2106H 4Ω2000W 250W 112V 3
Ch 1.
MA-5002VZ
Ch2.
Pins 3± 8 x 2106H 4Ω2000W 250W 112V 3
Pins 1± & 2± 4 x 2262H 2Ω2500W 625W 130V 2
Ch 1.
MA-5002VZ
Ch2.
Pins 1± & 2± 4 x 2262H 2Ω2500W 625W 130V 2
Amplifier Configurations: 4 VT4888 / 4 MA-5002VZ
Amplifier
Channel
Speakon NL8
Terminals Driving
Nominal
Impedance
at Pins
Amplifier Power
Rating at
Nominal
Impedance
Power Available
to each
Component
Bandpass
Peak
Voltage
Vac
Limiter
Threshold
dBu
Pins 4± 4 x 2431H 8Ω1300W 325W 56V -3
Ch 1.
MA-5002VZ
Ch2.
Pins 4± 4 x 2431H 8Ω1300W 325W 56V -3
Pins 3± 8 x 2106H 4Ω2000W 250W 112V 3
Ch 1.
MA-5002VZ
Ch2.
Pins 3± 8 x 2106H 4Ω2000W 250W 112V 3
Pins 2± 2 x 2262H 4Ω2000W 1000W 130V 2
Ch 1.
MA-5002VZ
Ch2.
Pins 2± 2 x 2262H 4Ω2000W 1000W 130V 2
Pins 1± 2 x 2262H 4Ω2000W 1000W 130V 2
Ch 1.
MA-5002VZ
Ch2.
Pins 1± 2 x 2262H 4Ω2000W 1000W 130V 2

Page 9
Amplifier Configurations: 6 VT4888 / 4 MA-5002VZ
Amplifier
Channel
Speakon NL8
Terminals Driving
Nominal
Impedance
at Pins
Amplifier Power
Rating at
Nominal
Impedance
Power Available
to each
Component
Bandpass
Peak
Voltage
Vac
Limiter
Threshold
dBu
Pins 4± 6 x 2431H 5.7Ω1300W 216W 56V -3
Ch 1.
MA-5002VZ
Ch2.
Pins 4± 6 x 2431H 5.7Ω1300W 216W 56V -3
Pins 3± 12 x 2106H 2.7Ω2000W 167W 112V 3
Ch 1.
MA-5002VZ
Ch2.
Pins 3± 12 x 2106H 2.7Ω2000W 167W 112V 3
Pins 2± 3 x 2262H 2.7Ω2000W 667W 130V 2
Ch 1.
MA-5002VZ
Ch2.
Pins 2± 3 x 2262H 2.7Ω2000W 667W 130V 2
Pins 1± 3 x 2262H 2.7Ω2000W 667W 130V 2
Ch 1.
MA-5002VZ
Ch2.
Pins 1± 3 x 2262H 2.7Ω2000W 667W 130V 2
NOTE:
If MA-3600 with 1.4V input sensitivity were used for the HF section, the same limiter threshold
would apply. Users might need to re-adjust DSP output gain.
Please refer to: NOTES REGARDING LIMITER SETTINGS on page 5.

Page 10
IMPORTANT NOTES:
All wiring configurations shown above use 8-conductor speaker cables terminated with Neutrik NL8 "Speakons".
Ensure that each conductor in the cable is a minimum of #13 AWGuage (3-4 mm).
JBL VT4888:
The HF section of a VT4888 has two 2431H drivers (8Ω) wired in Series. =16ΩPins 4±
The MF section of a VT4888 has four 2106H drivers (8Ω) wired in Series / Parallel. =8ΩPins 3±
The LF section of a VT4888 has two 2262H drivers (8Ω) wired Independently. =8Ω/ 8ΩPins 1±, 2±
3 x Power Amplifiers
(2ΩLoad on LF Passband)
4 x Power Amplifiers
(recommended)
OR
JBL V ERTEC V T 4888 Li ne A rray
PowerAm plifierconfigurations - 4 Box Array
Crown
MA-5002VZ
Pin 4 ± Pin 4 ±
NL8 Jumper
Cable
8Ω8Ω
Crown
MA-5002VZ
Crown
MA-5002VZ
Pin 3 ±
Pin 3 ±
4Ω4ΩPin 2 ±Pin 2 ±
4Ω4Ω
NL8 Jumper
Cable
Pin 1 ± Pin 1 ±
Crown
MA-5002VZ
Pin 4 ± Pin 4 ±
NL8 Jumper
Cable
8Ω8Ω
Crown
MA-5002VZ
Crown
MA-5002VZ
Pin 3 ±
Pin 3 ±
2Ω2ΩPin 1&2 ±Pin 1&2 ±
4Ω4Ω
NL8 Jumper
Cable
Crown
MA-5002VZ
4Ω4Ω

Page 11
VT4889 Transducer Complement:
Model Speakon NL8
Terminals
Per
box
Nominal
Impedance
per
Transducer
Nominal
Impedance
per
Passband
AES Power
100 HR Rating
per Transducer
Peak Power
Rating per
Transducer
Recommended
Power per
Passband
HF 2435H Pins 4± x 3 5.3Ω16Ω75W 300W 300W
MF 2250H Pins 3± x 4 8Ω8Ω300W 1200W 1200W
LF 2255H Pins 1± & 2± x 2 8Ω8Ω+ 8Ω600W 2400W 800W + 800W
Amplifier Configurations: 4 VT4889 / 3 MA-5002VZ
Amplifier
Channel
Speakon NL8
Terminals Driving
Nominal
Impedance
at Pins
Amplifier Power
Rating at
Nominal
Impedance
Power Available
to each
Component
Bandpass
Peak
Voltage
Vac
Limiter
Threshold
dBu
Pins 4± 6 x 2435H 8Ω1300W 217W 100V 2.5
Ch 1.
MA-5002VZ
Ch2.
Pins 4± 6 x 2435H 8Ω1300W 217W 100V 2.5
Pins 3± 8 x 2250H 4Ω2000W 250W 150V 2.5
Ch 1.
MA-5002VZ
Ch2.
Pins 3± 8 x 2250H 4Ω2000W 250W 150V 2.5
Pins 1± & 2± 4 x 2255H 2Ω2500W 625W 120V 3.5
Ch 1.
MA-5002VZ
Ch2.
Pins 1± & 2± 4 x 2255H 2Ω2500W 625W 120V 3.5
Amplifier Configurations: 4 VT4889 / 4 MA-5002VZ
Amplifier
Channel
Speakon NL8
Terminals Driving
Nominal
Impedance
at Pins
Amplifier Power
Rating at
Nominal
Impedance
Power Available
to each
Component
Bandpass
Peak
Voltage
Vac
Limiter
Threshold
dBu
Pins 4± 6 x 2435H 8Ω1300W 217W 100V 2.5
Ch 1.
MA-5002VZ
Ch2.
Pins 4± 6 x 2435H 8Ω1300W 217W 100V 2.5
Pins 3± 8 x 2250H 4Ω2000W 250W 150V 2.5
Ch 1.
MA-5002VZ
Ch2.
Pins 3± 8 x 2250H 4Ω2000W 250W 150V 2.5
Pins 2± 2 x 2255H 4Ω2000W 1000W 120V 3.5
Ch 1.
MA-5002VZ
Ch2.
Pins 2± 2 x 2255H 4Ω2000W 1000W 120V 3.5
Pins 1± 2 x 2255H 4Ω2000W 1000W 120V 3.5
Ch 1.
MA-5002VZ
Ch2.
Pins 1± 2 x 2255H 4Ω2000W 1000W 120V 3.5

Page 12
Amplifier Configurations: 6 VT4889 / 4 MA-5002VZ
Amplifier
Channel
Speakon NL8
Terminals Driving
Nominal
Impedance
at Pins
Amplifier Power
Rating at
Nominal
Impedance
Power Available
to each
Component
Bandpass
Peak
Voltage
Vac
Limiter
Threshold
dBu
Pins 4± 9 x 2435H 5.7Ω1300W 145W 100V 2.5
Ch 1.
MA-5002VZ
Ch2.
Pins 4± 9 x 2435H 5.7Ω1300W 145W 100V 2.5
Pins 3± 12 x 2250H 2.7Ω2000W 167W 150V 2.5
Ch 1.
MA-5002VZ
Ch2.
Pins 3± 12 x 2250H 2.7Ω2000W 167W 150V 2.5
Pins 2± 3 x 2255H 2.7Ω2000W 667W 120V 3.5
Ch 1.
MA-5002VZ
Ch2.
Pins 2± 3 x 2255H 2.7Ω2000W 667W 120V 3.5
Pins 1± 3 x 2255H 2.7Ω2000W 667W 120V 3.5
Ch 1.
MA-5002VZ
Ch2.
Pins 1± 3 x 2255H 2.7Ω2000W 667W 120V 3.5
VT4880 Transducer Complement:
Model Speakon NL4
Terminals
Per
box
Nominal
Impedance
per
Transducer
Nominal
Impedance
per
Passband
AES Power
100 HR
Rating per
Transducer
Peak Power
Rating per
Transducer
Recommended
Power per
Passband
VLF 2 x 2258H Pins 1± & 2± x 2 8Ω8Ω+ 8Ω800w 3200W 1600W
Amplifier Configurations: 2 VT4880 / 1 MA-5002VZ
Amplifier
Channel
Speakon NL4
Terminals Driving
Nominal
Impedance
at Pins
Amplifier Power
Rating at
Nominal
Impedance
Power Available
to each
Bandpass
Bandpass
Peak
Voltage
Vac
Limiter
Threshold
dBu
Pins 1± & 2± 2 x 2258H 4Ω 2000W 900W 120V 3.5
Ch 1.
MA-5002VZ
Ch2.
Pins 1± & 2± 2 X 2258H 4Ω 2000W 900W 120V 3.5
Please refer to: NOTES REGARDING LIMITER SETTINGS on page 5.

Page 13
IMPORTANT NOTES:
All wiring configurations shown above use 8-conductor speaker cables terminated with Neutrik NL8 "Speakons".
Ensure that each conductor in the cable is a minimum of #13 AWGuage (3-4 mm).
JBL VT4889:
The HF section of a VT4889 has three 2435H drivers (5.3Ω) wired in Series. =16ΩPins 4±
The MF section of a VT4889 has four 2250H drivers (8Ω) wired in Series / Parallel. =8ΩPins 3±
The LF section of a VT4889 has two 2255H drivers (8Ω) wired Independently. =8Ω/ 8ΩPins 1±, 2±
3 x Power Amplifiers
(2ΩLoad on LF Passband)
4 x Power Amplifiers
(recommended)
OR
JBL V erT e c V T 4889 Li ne A rray
PowerAm plifierconfigurations - 4 Box Array
Crown
MA-5002VZ
Pin 4 ± Pin 4 ±
NL8 Jumper
Cable
8Ω8Ω
Crown
MA-5002VZ
Crown
MA-5002VZ
Pin 3 ±
Pin 3 ±
4Ω4ΩPin 2 ±Pin 2 ±
4Ω4Ω
NL8 Jumper
Cable
Pin 1 ± Pin 1 ±
Crown
MA-5002VZ
Pin 4 ± Pin 4 ±
NL8 Jumper
Cable
8Ω8Ω
Crown
MA-5002VZ
Crown
MA-5002VZ
Pin 3 ±
Pin 3 ±
2Ω2ΩPin 1&2 ±Pin 1&2 ±
4Ω4Ω
NL8 Jumper
Cable
Crown
MA-5002VZ
4Ω4Ω

Page 14
VERTEC SYSTEMS
SUSPENSION HARDWARE & ASSEMBLY NOTES
Arrays of similar VERTEC Model
• Each VERTEC model uses the matching model of Array Frame (VT488X-AF) or
Short Frame (VT488X-SF) to create clusters of the same model.
• These same frames can also be used to ground stack the various systems.
Arrays of Combined VERTEC Models
• Clusters of combined models (i.e. VT4887s attached under a VT4889) use
ADAPTER FRAMES to interconnect the various models.
• These frames are the:
 VT4800-DA to adapt VT4887 under VT4889 or VT4880.
 VT4800-CA to adapt VT4887 under VT4888.
 VT4800-UA to adapt any model to any model.
Ground stacking capabilities
• All VERTEC models can be ground stacked using the matching model of AF or SF
frames.
• Up to 6 VERTEC cabinets can be safely stacked using the appropriate VERTEC AF
frame and up to 4 cabinets when using the SF Frame.
General rigging recommendations
• Only qualified personnel should perform suspension of audio systems!
• Users should inspect every component to be rigged every time the system is used.
• Users should verify that all Quick Release Pins in the VERTEC cabinets and in the
suspension frames are properly locked when rigging the system.

Page 15
VERTEC SYSTEMS SUSPENSION FRAMES & HINGE BARS
VERTEC
MODEL
FRAME
MODELS
NOTES HINGE
Part #
VT4889
VT4889-AF
VT4889-SF
VT4800-UA
VT4800-DA
Standard long frame. 16 VT4889 @ 7:1 DF*
Standard short frame. 16 VT4889 @ 7:1 DF
Universal frame to hang any model to any model.
Adapter frame to hang 4 VT4887 under VT4889
336892-001
(4889 FRONT HINGE)
339693-001
(4889 REAR HINGE)
339644-001
(4889 REAR HINGE
FOR UA ADAPTER)
VT4880
VT4889-AF
VT4889-SF
VT4800-UA
VT4800-DA
Standard long frame. 18 VT4880 @ 7:1 DF
Standard short frame. 18 VT4880 @ 7:1 DF
Universal frame to hang any model to any model.
Adapter frame to hang 4 VT4887 under VT4880
336892-001
(4889 FRONT HINGE)
339693-001
(4889 REAR HINGE)
339644-001
(4889 REAR HINGE
FOR UA ADAPTER)
VT4888
VT4888-AF
VT4888-SF
VT4800-UA
VT4800-CA
Standard long frame. 18 VT4888 @ 7:1 DF
Standard short frame. 18 VT4888 @ 7:1 DF
Universal frame to hang any model to any model.
Adapter frame to hang VT4887 under VT4888
350597-001
(4888 FRONT HINGE)
338515-001
(4888 REAR HINGE)
339643-001
(4888 REAR HINGE
FOR ADAPTERS)
VT4887
VT4887-AF
VT4887-SF
VT4800-UA
VT4800-CA
VT4800-DA
Standard long frame. 18 VT4887 @ 7:1 DF
Standard short frame. 18 VT4887 @ 7:1 DF
Universal frame to hang any model to any model.
Adapter frame to hang VT4887 under VT4888
Adapter frame to hang 4 VT4887 under VT4889
350551-001
(4887/81 FRONT HINGE)
350342-001
(4887 REAR HINGE)
VT4881
VT4887-AF
VT4887-SF
VT4800-UA
VT4800-CA
Standard long frame. 12 VT4881 @ 7:1 DF
Standard short frame. 12 VT4881 @ 7:1 DF
Universal frame to hang any model to any model.
Adapter frame to hang VT4881 under VT4888
**VT4887 hang directly under the VT4881
350551-001
(4887/81 FRONT HINGE)
350552-001
(4881 REAR HINGE)
* DF = Design Factor.
Please refer to JBL Technical Notes Volume 1, Number 14 Basic Principles for
Suspending Loudspeaker Systems (available at www.jblpro.com).

Page 16
VERTEC VT4888, VT4887, VT4881 SYSTEMS:
SUSPENSION FRAMES

Page 17
VERTEC SYSTEMS: SUSPENSION HINGE BARS
\
High-grade steel alloy hinge bars are used to couple adjacent boxes together. There are
several different types. To ensure ease and proper inter-connection, make certain that the
correct hinge bar model is matched to the appropriate Array Frame or Short Frame as
well as the correct VERTEC model.

Page 18
VT4889 with VT4887 attached using VT4800-DA

Page 19
TYPICAL 8-BOX HANGING ARRAY
The VT4889 full size, the VT4888 mid size, and VT4887 compact line array elements
can be suspended from either the “AF” (long) or “SF” (short) array frame. Shown here,
eight VT4887 suspended from a VT4887-AF array frame.

Page 20
VERTEC SUPPORT TEAM
DIRECTOR, TOUR SOUND
David Scheirman
Office phone: [phone]
Pager: [phone]
Email address: [email protected]
TOUR SOUND PRODUCT MANAGER
Raul Gonzalez
Office phone: [phone]
Mobile phone: [phone]
Email address: [email protected]
DIRECTOR, SYSTEM DEVELOPMENT
Mark Engebretson
Office phone: [phone]
Mobile phone: [phone]
Email address: [email protected]
DIRECTOR, CUSTOM PROJECT
MANAGEMENT
Ted Leamy
Office phone: [phone]
Mobile phone: [phone]
Email address: [email protected]
APPLICATIONS ENGINEERS
NORTH AMERICA
Jay Fullmer, Applications Engineer
Office phone: [phone]
Mobile phone: [phone]
Email address: [email protected]
EUROPE
Mark Bailey, Market Development Engineer
Office phone: [phone]
Mobile phone: [phone]
Email address: [email protected]
ASIA
David Fuller, Market Development Engineer
Office phone: [phone]
Mobile phone: [phone]
Email address: [email protected]
SOUTH AMERICA & CARIBBEAN
Rafael Quintero, Dir of Sales, Intercontinental
Office phone: [phone]
Email address: [email protected]
WEBLINKS
JBL PROFESSIONAL: www.jblpro.com
VERTEC PRODUCTS: www.jblpro.com/vertec1/new_vertec/
JBL CUSTOMER SERVICE: www.jblproservice.com
VERTEC EMAIL ADDRESS: [email protected]
CROWN AMPLIFIERS: www.crownaudio.com
JBL Professional
8500 Balboa Blvd.
Northridge, CA 91329
818-894-8850
© 2002 JBL Professional (12/02)
Part # 350485-001