Array Applications Manual
For models VT4889, VT4888, VT4887, VT4881, VT4880
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 3
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 4
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:
Nominal
Impedance Impedance
per
Transducer
Nominal
AES Power
100 HR
Rating per Rating per
Transducer Transducer
Peak
Power
Recommended
Power per
Speakon NL8
Terminals
Per
box
Model
per
Passband
Passband
HF
MF
LF
2407H
2104H
2168J
2256G
Pins 4± 1
Pins 4± 1
x 2
x 4
x 2
x 1
8Ω
8Ω
8Ω
8Ω
25W
50W
100W
200W
450W
450W
2
Pins 3±
16Ω
8Ω
350W
600W
1400W
2400W
1000W
1200W
Pins 1± & 2± 3
VLF
2 x 8Ω
8Ω + 8Ω
1
2
3
PASSIVELY CROSSED OVER MID/HIGH FREQUENCY SECTION.
LF SECTION HAS TWO 8” COMPONENTS WIRED IN PARALLEL.
SINGLE COMPONENT WITH TWO VOICE COILS INDEPENDENTLY WIRED.
Page 5
Amplifier Configurations: 4 x VT4887 & 2 VT4881 / 3 MA-
5002
Amplifier Power
Rating at
Power
Available to
each
Bandpass
Peak
Voltage
Vac
Nominal
Impedance
at Pins
Limiter
Threshold
dBu
Amplifier
Channel
Speakon NL8
Terminals
Driving
Nominal
Impedance
Bandpass
4 x 2407H
& 8 x 2104H
Ch 1.
MA-5002VZ
Ch2.
Pins 4±
Pins 4±
4Ω
4Ω
4Ω
4Ω
4Ω
4Ω
1800W
1800W
1800W
1800W
1800W
1800W
900W
900W
900W
900W
900W
900W
54V
54V
-3
-3
4
4 x 2407H
& 8 x 2104H
Ch 1.
MA-5002VZ
Ch2.
Pins 3±
4 x 2168J
4 x 2168J
1 x 2256G
1 X 2256G
134V
134V
86V
Pins 3±
4
Ch 1.
MA-5002VZ
Ch2.
Pins 1± & 2±
Pins 1± & 2±
-2*
-2*
86V
* 6 dB of headroom required for extended bandpass.
Amplifier Configurations: 4 x VT4887 & 2 VT4881 / 3 MA-
3600
Amplifier Power
Rating at
Bandpass
Peak
Voltage
Vac
Nominal
Impedance at
Pins
Power Available
to each
Limiter
Threshold
dBu
Amplifier Speakon NL8
Channel
Driving
Terminals
Nominal
Impedance
Bandpass
4 x 2407H
& 8 x 2104H
Ch 1.
MA-3600 VZ
Ch2.
Pins 4±
Pins 4±
Pins 3±
Pins 3±
4Ω
4Ω
4Ω
4Ω
4Ω
4Ω
1120W
1120W
1565W
1565W
1565W
1565W
560W
560W
783W
783W
1565W
1565W
54V
54V
-3
-3
4
4 x 2407H
& 8 x 2104H
Ch 1.
MA-3600 VZ
Ch2.
4 x 2168J
4 x 2168J
134V
134V
86V
4
Ch 1.
MA-3600 VZ
Ch2.
Pins 1± & 2± 1 x 2256G
Pins 1± & 2± 1 X 2256G
1
86V
1
EASY:
1 X MA-3600 = 2 VT4887
1 X MA-3600 = 2 VT4881
Page 6
JBL VerTec VT4887 with VT4881
PowerAmplifierconfigurations- 4+2 Box Array
VT4881
NL8
Jumper
Cable
VT4887
NL8
Crown
MA-5002VZ
SINGLE
Cable
CH-2
Pin 4 ±
4887-MF/HF
CH-1
Pin 3 ±
4887-LF
Crown
MA-5002VZ
2Ω
2Ω
(2) MA-5002VZ
Power Amplifiers
CH-1
Pin 2±
4881-VLF
CH-1
Pin 1±
4881-VLF
Crown
MA-5002VZ
4Ω
4 Ω
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.
This network connects two 2407H HF drivers (8Ω) wired in series
and four 2104H MF (8Ω) wired in Series / Parallel.
=8Ω
Pins 4±
The LF section of a VT4887 has two 2168J drivers (16Ω) wired in Parallel.
=8Ω
Pins 3±
JBL VT4881:
The single 15" 2256G VLF device has two 8Ω coils wired independently.
=8Ω/8Ω
Pins 1±, 2±
Page 7
VT4888 Transducer Complement:
Nominal
Per Impedance Impedance
Nominal
Speakon
NL8
Terminals
AES Power 100 Peak Power
Recommended
Power per
Model
HR Rating per
Transducer
Rating per
Transducer
box
per
per
Passband
transducer Passband
HF
2431H
Pins 4±
Pins 3±
x 2
x 4
8Ω
8Ω
8Ω
16Ω
8Ω
75W
100W
700W
300W
400W
300W
800W
MF 2106H
LF 2262H
Pins 1± & 2± x 2
8Ω + 8Ω
2800W
2500W
Amplifier Configurations:4 VT4888 / 3 MA-5002VZ
Amplifier Power
Rating at
Bandpass
Nominal
Impedance
at Pins
Power Available
to each
Limiter
Threshold
dBu
Amplifier
Channel
Speakon NL8
Terminals
Peak
Voltage
Vac
Driving
Nominal
Impedance
Component
Ch 1.
MA-5002VZ
Ch2.
Pins 4±
Pins 4±
4 x 2431H
4 x 2431H
8 x 2106H
8 x 2106H
4 x 2262H
4 x 2262H
8Ω
8Ω
4Ω
4Ω
2Ω
2Ω
1300W
1300W
2000W
2000W
2500W
2500W
325W
325W
250W
250W
625W
625W
56V
56V
-3
-3
3
Ch 1.
MA-5002VZ
Ch2.
Pins 3±
112V
112V
130V
130V
Pins 3±
3
Ch 1.
MA-5002VZ
Ch2.
Pins 1± & 2±
Pins 1± & 2±
2
2
Amplifier Configurations:4 VT4888 / 4 MA-5002VZ
Amplifier Power
Rating at
Bandpass
Peak
Voltage
Vac
Nominal
Impedance
at Pins
Power Available
to each
Limiter
Threshold
dBu
Amplifier
Channel
Speakon NL8
Terminals
Driving
Nominal
Impedance
Component
Ch 1.
MA-5002VZ
Ch2.
Pins 4±
Pins 4±
Pins 3±
Pins 3±
Pins 2±
Pins 2±
Pins 1±
Pins 1±
4 x 2431H
4 x 2431H
8 x 2106H
8 x 2106H
2 x 2262H
2 x 2262H
2 x 2262H
2 x 2262H
8Ω
8Ω
4Ω
4Ω
4Ω
4Ω
4Ω
4Ω
1300W
1300W
2000W
2000W
2000W
2000W
2000W
2000W
325W
325W
56V
56V
-3
-3
3
Ch 1.
MA-5002VZ
Ch2.
250W
112V
112V
130V
130V
130V
130V
250W
3
Ch 1.
MA-5002VZ
Ch2.
1000W
1000W
1000W
1000W
2
2
Ch 1.
MA-5002VZ
Ch2.
2
2
Page 8
Amplifier Configurations:6 VT4888 / 4 MA-5002VZ
Amplifier Power
Rating at
Bandpass
Peak
Voltage
Vac
Nominal
Impedance
at Pins
Power Available
to each
Limiter
Threshold
dBu
Amplifier
Channel
Speakon NL8
Terminals
Driving
Nominal
Impedance
Component
Ch 1.
MA-5002VZ
Ch2.
Pins 4±
Pins 4±
Pins 3±
Pins 3±
Pins 2±
Pins 2±
Pins 1±
Pins 1±
6 x 2431H
6 x 2431H
12 x 2106H
12 x 2106H
3 x 2262H
3 x 2262H
3 x 2262H
3 x 2262H
5.7Ω
5.7Ω
2.7Ω
2.7Ω
2.7Ω
2.7Ω
2.7Ω
2.7Ω
1300W
1300W
2000W
2000W
2000W
2000W
2000W
2000W
216W
216W
167W
167W
667W
667W
667W
667W
56V
56V
-3
-3
3
Ch 1.
MA-5002VZ
Ch2.
112V
112V
130V
130V
130V
130V
3
Ch 1.
MA-5002VZ
Ch2.
2
2
Ch 1.
MA-5002VZ
Ch2.
2
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 9
JBL VERTEC VT4888 Line Array
PowerAmplifierconfigurations- 4BoxArray
NL8 Jumper
Cable
NL8 Jumper
Cable
NL8 Jumper
Cable
NL8 Jumper
Cable
Pin 4 ±
Pin 3 ±
Pin 2 ±
Pin 1 ±
Crown
MA-5002VZ
Pin 4 ±
Pin 3 ±
Pin 2 ±
Pin 1 ±
8Ω
4Ω
4Ω
4Ω
8Ω
4Ω
4Ω
4Ω
Pin 4 ±
Pin 3 ±
Crown
MA-5002VZ
Pin 4 ±
Pin 3 ±
8Ω
8Ω
4Ω
2Ω
Crown
MA-5002VZ
Crown
MA-5002VZ
4Ω
Crown
MA-5002VZ
Pin 1&2 ±
Crown
MA-5002VZ
Pin 1&2 ±
2Ω
Crown
MA-5002VZ
3 x Power Amplifiers
(2Ω Load on LF Passband)
4 x Power Amplifiers
(recommended)
OR
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.
The MF section of a VT4888 has four 2106H drivers (8Ω) wired in Series / Parallel.
The LF section of a VT4888 has two 2262H drivers (8Ω) wired Independently.
=16Ω
=8Ω
=8Ω / 8Ω
Pins 4±
Pins 3±
Pins 1±, 2±
Page 10
VT4889 Transducer Complement:
Nominal
Impedance Impedance
per
Transducer
Nominal
AES Power Peak Power Recommended
Speakon NL8 Per
Model
100 HR Rating Rating per
per Transducer Transducer
Power per
Passband
Terminals
box
per
Passband
HF
MF
LF
2435H
2250H
Pins 4±
Pins 3±
x 3
x 4
5.3Ω
8Ω
16Ω
8Ω
75W
300W
600W
300W
1200W
2400W
300W
1200W
2255H Pins 1± & 2± x 2
8Ω
8Ω + 8Ω
800W + 800W
Amplifier Configurations:4 VT4889 / 3 MA-5002VZ
Amplifier Power
Rating at
Bandpass
Peak
Voltage
Vac
Nominal
Impedance
at Pins
Power Available
to each
Limiter
Threshold
dBu
Amplifier
Channel
Speakon NL8
Terminals
Driving
Nominal
Impedance
Component
Ch 1.
MA-5002VZ
Ch2.
Pins 4±
Pins 4±
Pins 3±
Pins 3±
6 x 2435H
6 x 2435H
8 x 2250H
8 x 2250H
8Ω
8Ω
4Ω
4Ω
2Ω
2Ω
1300W
1300W
2000W
2000W
2500W
2500W
217W
217W
250W
250W
625W
625W
100V
100V
150V
150V
120V
120V
2.5
2.5
2.5
2.5
3.5
3.5
Ch 1.
MA-5002VZ
Ch2.
Ch 1.
MA-5002VZ
Ch2.
Pins 1± & 2± 4 x 2255H
Pins 1± & 2± 4 x 2255H
Amplifier Configurations:4 VT4889 / 4 MA-5002VZ
Amplifier Power
Rating at
Bandpass
Peak
Voltage
Vac
Nominal
Impedance
at Pins
Power Available
to each
Limiter
Threshold
dBu
Amplifier
Channel
Speakon NL8
Terminals
Driving
Nominal
Impedance
Component
Ch 1.
MA-5002VZ
Ch2.
Pins 4±
Pins 4±
Pins 3±
Pins 3±
Pins 2±
Pins 2±
Pins 1±
Pins 1±
6 x 2435H
6 x 2435H
8 x 2250H
8 x 2250H
2 x 2255H
2 x 2255H
2 x 2255H
2 x 2255H
8Ω
8Ω
4Ω
4Ω
4Ω
4Ω
4Ω
4Ω
1300W
1300W
2000W
2000W
2000W
2000W
2000W
2000W
217W
217W
100V
100V
150V
150V
120V
120V
120V
120V
2.5
2.5
2.5
2.5
3.5
3.5
3.5
3.5
Ch 1.
MA-5002VZ
Ch2.
250W
250W
Ch 1.
MA-5002VZ
Ch2.
1000W
1000W
1000W
1000W
Ch 1.
MA-5002VZ
Ch2.
Page 11
Amplifier Configurations:6 VT4889 / 4 MA-5002VZ
Amplifier Power
Rating at
Bandpass
Peak
Voltage
Vac
Nominal
Impedance
at Pins
Power Available
to each
Limiter
Threshold
dBu
Amplifier
Channel
Speakon NL8
Terminals
Driving
Nominal
Impedance
Component
Ch 1.
MA-5002VZ
Ch2.
Pins 4±
Pins 4±
Pins 3±
Pins 3±
Pins 2±
Pins 2±
Pins 1±
Pins 1±
9 x 2435H
9 x 2435H
12 x 2250H
12 x 2250H
3 x 2255H
3 x 2255H
3 x 2255H
3 x 2255H
5.7Ω
5.7Ω
2.7Ω
2.7Ω
2.7Ω
2.7Ω
2.7Ω
2.7Ω
1300W
1300W
2000W
2000W
2000W
2000W
2000W
2000W
145W
145W
167W
167W
667W
667W
667W
667W
100V
100V
150V
150V
120V
120V
120V
120V
2.5
2.5
2.5
2.5
3.5
3.5
3.5
3.5
Ch 1.
MA-5002VZ
Ch2.
Ch 1.
MA-5002VZ
Ch2.
Ch 1.
MA-5002VZ
Ch2.
VT4880 Transducer Complement:
Nominal
Impedance Impedance
per per
Nominal AES Power
Peak Power Recommended
Speakon NL4
Terminals
Per
box
100 HR
Rating per
Model
Rating per
Transducer
Power per
Passband
Transducer Passband Transducer
VLF 2 x 2258H
Pins 1± & 2±
x 2
8Ω 8Ω + 8Ω 800w
3200W
1600W
Amplifier Configurations:2 VT4880 / 1 MA-5002VZ
Amplifier Power
Rating at
Bandpass
Peak
Voltage
Vac
Nominal
Impedance
at Pins
Power Available
to each
Limiter
Threshold
dBu
Amplifier
Channel
Speakon NL4
Terminals
Driving
Nominal
Impedance
Bandpass
Ch 1.
MA-5002VZ
Ch2.
Pins 1± & 2± 2 x 2258H
Pins 1± & 2± 2 X 2258H
4Ω
4Ω
2000W
2000W
900W
900W
120V
120V
3.5
3.5
Please refer to: NOTES REGARDING LIMITER SETTINGS on page 5.
Page 12
JBL VerTec VT4889 Line Array
PowerAmplifierconfigurations- 4BoxArray
NL8 Jumper
Cable
NL8 Jumper
Cable
NL8 Jumper
Cable
NL8 Jumper
Cable
Pin 4 ±
Pin 3 ±
Pin 2 ±
Pin 1 ±
Crown
MA-5002VZ
Pin 4 ±
Pin 3 ±
Pin 2 ±
Pin 1 ±
8Ω
4Ω
4Ω
4Ω
8Ω
4Ω
4Ω
4Ω
Pin 4 ±
Pin 3 ±
Crown
MA-5002VZ
Pin 4 ±
Pin 3 ±
8Ω
8Ω
4Ω
2Ω
Crown
MA-5002VZ
Crown
MA-5002VZ
4Ω
Crown
MA-5002VZ
Pin 1&2 ±
Crown
MA-5002VZ
Pin 1&2 ±
2Ω
Crown
MA-5002VZ
3 x Power Amplifiers
(2Ω Load on LF Passband)
4 x Power Amplifiers
(recommended)
OR
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.
The MF section of a VT4889 has four 2250H drivers (8Ω) wired in Series / Parallel.
The LF section of a VT4889 has two 2255H drivers (8Ω) wired Independently.
=16Ω
=8Ω
=8Ω / 8Ω
Pins 4±
Pins 3±
Pins 1±, 2±
Page 13
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 14
VERTEC SYSTEMS SUSPENSION FRAMES & HINGE BARS
VERTEC FRAME
MODEL MODELS
NOTES
HINGE
Part #
336892-001
VT4889
VT4880
VT4888
VT4889-AF Standard long frame. 16 VT4889 @ 7:1 DF*
VT4889-SF Standard short frame. 16 VT4889 @ 7:1 DF
VT4800-UA Universal frame to hang any model to any model.
VT4800-DA Adapter frame to hang 4 VT4887 under VT4889
(4889 FRONT HINGE)
339693-001
(4889 REAR HINGE)
339644-001
(4889 REAR HINGE
FOR UA ADAPTER)
336892-001
(4889 FRONT HINGE)
339693-001
(4889 REAR HINGE)
339644-001
(4889 REAR HINGE
FOR UA ADAPTER)
350597-001
(4888 FRONT HINGE)
338515-001
(4888 REAR HINGE)
339643-001
VT4889-AF Standard long frame. 18 VT4880 @ 7:1 DF
VT4889-SF Standard short frame. 18 VT4880 @ 7:1 DF
VT4800-UA Universal frame to hang any model to any model.
VT4800-DA Adapter frame to hang 4 VT4887 under VT4880
VT4888-AF Standard long frame. 18 VT4888 @ 7:1 DF
VT4888-SF Standard short frame. 18 VT4888 @ 7:1 DF
VT4800-UA Universal frame to hang any model to any model.
VT4800-CA Adapter frame to hang VT4887 under VT4888
(4888 REAR HINGE
FOR ADAPTERS)
350551-001
(4887/81 FRONT HINGE)
350342-001
VT4887
VT4881
VT4887-AF Standard long frame. 18 VT4887 @ 7:1 DF
VT4887-SF Standard short frame. 18 VT4887 @ 7:1 DF
VT4800-UA Universal frame to hang any model to any model.
VT4800-CA Adapter frame to hang VT4887 under VT4888
VT4800-DA Adapter frame to hang 4 VT4887 under VT4889
VT4887-AF Standard long frame. 12 VT4881 @ 7:1 DF
VT4887-SF Standard short frame. 12 VT4881 @ 7:1 DF
VT4800-UA Universal frame to hang any model to any model.
VT4800-CA Adapter frame to hang VT4881 under VT4888
**VT4887 hang directly under the VT4881
(4887 REAR HINGE)
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 15
VERTEC VT4888, VT4887, VT4881 SYSTEMS:
SUSPENSION FRAMES
Page 16
VERTEC SYSTEMS: SUSPENSION HINGE BARS
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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 17
VT4889 with VT4887 attached using VT4800-DA
Page 18
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 19
VERTEC SUPPORT TEAM
DIRECTOR, TOUR SOUND
David Scheirman
Office phone: (818) 895-3458
Pager: (888) 861-1622
APPLICATIONS ENGINEERS
NORTH AMERICA
Jay Fullmer, Applications Engineer
Office phone: (818) 895-3473
Mobile phone: (818) 324-8265
Email address: [email protected]
Email address: [email protected]
TOUR SOUND PRODUCT MANAGER
Raul Gonzalez
Office phone: (818) 830-8749
Mobile phone: (818) 802-9176
EUROPE
Mark Bailey, Market Development Engineer
Office phone: 44-173-764-4942
Mobile phone: 44-777-581-6456
Email address: [email protected]
Email address: [email protected]
DIRECTOR, SYSTEM DEVELOPMENT
Mark Engebretson
Office phone: (818) 895-5797
Mobile phone: (818) 359-1594
ASIA
David Fuller, Market Development Engineer
Office phone: 644-298-8669
Mobile phone: 642-929-88669
Email address: [email protected]
Email address: [email protected]
DIRECTOR, CUSTOM PROJECT
MANAGEMENT
Ted Leamy
Office phone: (818) 830-8771
Mobile phone: (818) 324-9389
Email address: [email protected]
SOUTH AMERICA & CARIBBEAN
Rafael Quintero, Dir of Sales, Intercontinental
Office phone: 818-895-3469
Email address: [email protected]
WEBLINKS
JBL PROFESSIONAL:
VERTEC PRODUCTS:
CROWN AMPLIFIERS:
JBL Professional
8500 Balboa Blvd.
Northridge, CA 91329
818-894-8850
© 2002 JBL Professional (12/02)
Part # 350485-001
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