JBL VerTec VT4880 Instructions d'utilisation

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

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

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

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)

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 ±

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 ±

2Ω2ΩPin 1&2 ±Pin 1&2 ±

4Ω4Ω

NL8 Jumper

Cable

Crown

MA-5002VZ

4Ω4Ω

Ce manuel convient aux modèles suivants

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