JBL VT4887 User Manual

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  
8+ 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 (8) wired in series  
and four 2104H MF (8) wired in Series / Parallel.  
=8Ω  
Pins 4±  
The LF section of a VT4887 has two 2168J drivers (16) wired in Parallel.  
=8Ω  
Pins 3±  
JBL VT4881:  
The single 15" 2256G VLF device has two 8coils wired independently.  
=8/8Ω  
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  
8+ 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  
(2Load 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 (8) wired in Series.  
The MF section of a VT4888 has four 2106H drivers (8) wired in Series / Parallel.  
The LF section of a VT4888 has two 2262H drivers (8) wired Independently.  
=16Ω  
=8Ω  
=8/ 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  
8+ 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  
88+ 8800w  
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  
(2Load 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 (5.3) wired in Series.  
The MF section of a VT4889 has four 2250H drivers (8) wired in Series / Parallel.  
The LF section of a VT4889 has two 2255H drivers (8) wired Independently.  
=16Ω  
=8Ω  
=8/ 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  
\
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:  
JBL CUSTOMER SERVICE: www.jblproservice.com  
VERTEC EMAIL ADDRESS: [email protected]  
CROWN AMPLIFIERS:  
JBL Professional  
8500 Balboa Blvd.  
Northridge, CA 91329  
818-894-8850  
© 2002 JBL Professional (12/02)  
Part # 350485-001  
Page 20  

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