Void Indigo 6s, Indigo 6 Pro, Indigo Sub, Air 8 User Manual

Indigo Series

User Guide V1.0

©2018 Void Acoustics Research Ltd.

Version 1.0

This user guide is subject to change without notice.
For the latest online version, visit: www.voidacoustics.com

Void Acoustics and the Void logo are registered trademarks of Void
Acoustics Research Ltd. in the United Kingdom, USA and other
countries; all other Void trademarks are the property of Void Acoustics
Research Ltd.

Indigo Series User Guide V1.0

Page 3

Contents

1 Safety and regulations 4

1.1 Important safety instructions 4

1.2 Limitations 4

1.3 EC declaration of conformity 4

1.4 WEEE directive 4

2 Registration and limited warranty 5

3 Unpacking and checking 6

4 About 7

4.1 Welcome 7

4.2 Indigo Series overview 7

5 Specifications and dimensions 8

5.1 Indigo 6s 8

5.1.1 Indigo 6s specifications 8

5.1.2 Key features 9

5.1.3 Indigo 6s dimensions 9

5.2 Indigo 6 Pro 10

5.2.1 Indigo 6 Pro specifications 10

5.2.2 Key features 11

5.2.3 Indigo 6 Pro dimensions 11

5.3 Indigo Sub 12

5.3.1 Indigo Sub specifications 12

5.3.2 Key features 12

5.3.3 Indigo Sub dimensions 13

5.3.4 Indigo Sub impedance graph 13

6 Cabling and wiring 14

6.1 Electrical safety 14

6.2 Cable considerations for fixed
installations

14

6.3 Phoenix connector 14

6.4 Indigo 6s/Pro wiring diagram 15

6.5 Indigo 6s/Pro Bias V3/V9 speakONTM wiring 15

6.6 Indigo 6s/Pro Bias VQ speakONTM wiring 16

6.7 Indigo 6s/Pro Bias D1/Q2 Phoenix wiring 16

6.8 Indigo 6s/Pro Bias Q5 speakONTM wiring 17

6.9 Indigo Sub wiring diagram 17

6.10 Indigo Sub Bias V3/V9 speakONTM wiring 18

6.11 Indigo Sub Bias VQ speakONTM wiring 18

6.12 Indigo Sub Bias D1/Q2 Phoenix wiring 19

6.13 Indigo Sub Bias Q5 speakONTM wiring 19

7 System design 20

7.1 System design principles 20

7.2 Loudspeaker placement and positioning 21

7.3 Bass alignment - delay times 24

8 Mounting 25

8.1 Installation safety 26

8.2 Indigo 6s Mounting 26

8.3 Indigo Sub and Pro mounting 28

8.4 Indigo 6 Pro Mounting 30

9 Service 32

9.1 Return authorisation 32

9.2 Shipping and packing considerations 32

10 Appendix 33

Indigo Series User Guide V1.0

Page 4

1.1 Important safety instructions

The lightning flash with and arrowhead symbol
within an equilateral triangle is intended to alert the
user to the presence of uninsulated “dangerous
voltage” within the product’s enclosure that may
be of sucient magnitude to constitute a risk of
electric shock to persons.

The exclamation point within an equilateral triangle
is intended to alert the user of the presence of
important operating and maintenance (servicing)
instructions in the literature accompanying the
appliance.

Safety instructions - read this first

1. Read these instructions.

2. Keep these instructions.

3. Heed all warnings.

4. Follow all instructions.

5. Do not use this apparatus near water.

6. Clean only with a dry cloth.

7. Do not block any ventilation openings. Install in accordance
with the manufacturer’s instructions.

8. Do not install near any heat source such as radiators, heat
registers, stoves, or other such apparatus that produce heat.

9. Do not defeat the safety purpose of the grounding-type
plug. A grounding type plug has two blades and a third
grounding prong. The third prong is provided for your safety.
If the provided plug does not fit into your outlet, consult an
electrician for replacement of the obsolete outlet.

10. Protect power cords from being walked on or pinched
particularly at plugs, convenience receptacles, and the point
where they exit the apparatus.

11. Onlyuseattachmentsandaccessoriesspecifiedby Void
Acoustics.

12. Only use with the cart, stand, tripod, bracket, or table specified
by the manufacturer, or sold with the apparatus. When a
cart is used, use caution when moving the cart/apparatus
combination to avoid injury from tip-over.

13. Unplugtheapparatusduringlightningstormsorwhenunused
forlongperiodsoftime.

14. Refer all servicing to qualified service personnel. Servicing
is required when the apparatus has been damaged in
any way, such as when the power-supply cord or plug is
damaged, liquid has been spilled or objects have fallen into
the apparatus, the apparatus has been exposed to rain or
moisture, does not operate normally, or has been dropped.

15. Since the mains power supply cord attachment plug is used
to disconnect the device, the plug should always be easily
accessible.

16. Void loudspeakers can produce sound levels capable
of causing permanent hearing damage from prolonged
exposure. The higher the sound level, the less exposure
needed to cause such damage. Avoid prolonged exposure to
the high sound levels from the loudspeaker.

1.2 Limitations

This guide is provided to help familiarise the user with the
loudspeaker system and its accessories. It is not intended to provide
comprehensive electrical, fire, mechanical and noise training and is
not a substitute for industry-approved training. Nor does this guide
absolve the user of their obligation to comply with all relevant
safety legislation and codes of practice.

While every care has been taken in creating this guide, safety is
user-dependent and Void Acoustics Research Ltd cannot guarantee
complete safety whenever the system is rigged and operated.

1.3 EC declaration of conformity

Manufacturer:

Void Acoustics Research Ltd,
Unit 15 Dawkins Road Ind Est,
Poole, Dorset,
BH15 4JY,
United Kingdom.

We declare the under our sole responsibility the following product
models: Indigo 6s, Pro and Sub

are intended to be used as loudspeakers and are in conformity with
the following EC Directives, including all amendments, and with
national legislation implementing these directives:

• BS EN 60065:2002

• BS EN 55103-1/-2

March 2016

Alex Skan

Technical Director

1.4 WEEE directive

If the time arises to throw away your product, please recycle all the
components possible.

This symbol indicates that when the end-user
wishes to discard this product, it must be sent
to separate collection facilities for recovery
and recycling. By separating this product from
other household-type waste, the volume of
waste sent to incinerators or land-fills will be
reduced and natural resources will thus be
conserved.

The Waste Electrical and Electronic Equipment Directive (WEEE
Directive) aims to minimise the impact of electrical and electronic
goods on the environment. Void Acoustics Research Ltd complies
with the Directive 2002/96/EC and 2003/108/EC of the European
Parliament on waste electrical finance the cost of treatment and
recovery of electronic equipment (WEEE) in order to reduce the
amount of WEEE that is being disposed of in land-fill sites. All of
our products are marked with the WEEE symbol; this indicates that
this product must NOT be disposed of with other waste. Instead
it is the user’s responsibility to dispose of their waste electrical
and electronic equipment by handing it over to an approved
reprocessor, or by returning it to Void Acoustics Research Ltd for
reprocessing. For more information about where you can send
your waste equipment for recycling, please contact Void Acoustics
Research Ltd or one of your local distributors.

1 Safety and regulations

Indigo Series User Guide V1.0

Page 5

Limited warranty

The warranty

For a period of three (3) years from the date of
delivery to the original purchaser (as shown on the
original invoice or sales receipt; a copy of this may be
required as proof of warranty dates), Void Acoustics
Research Ltd (hereinafter “Void”) warrants to the
Original Owner (person or company who originally
purchased the product brand new from either Void
or a Void Authorised Dealer/Distributor) of each new
Indigo Series product (provided it was purchased at
an Authorised Void Dealer) that it is free of defects
in materials and workmanship and that each
product will meet or exceed all factory published
specifications for each respective model. Void agrees
to repair or replace (at its discretion) all defective
parts at no charge for labour or materials; subject to
following provisions:

Warranty violations

Void shall take no responsibility for repair or
replacement as specified under this warranty, if
the damaged product has been subject to misuse,
accident, neglect or failure to comply with normal
maintenance procedures; or if the serial number
has been defaced, altered or removed. Nor will Void
accept responsibility for, or resulting from, improper
alterations or unauthorised parts or repairs. This
warranty does not cover any damage to speakers
or any other consequential damage resulting from
breach of any written or implied warranty.

Void warranty provisions

Void will remedy any defect, regardless of the
reason for failure (except as excluded) by repair, or
replacement. Void will remedy the defect and ship
the product within a reasonable time after receipt of
the defective product at a Void Authorised Service
Centre.

To obtain warranty service

If a Void product requires service, the Owner must
contact Void or an Authorised Void Service Centre to
receive an R.A.N. (Return Authorisation Number) and
instructions on how to return the product to the Void
Authorised Service Centre, or to Void.

Void (or its Authorised Service Centre) will initiate
corrective repairs upon receipt of the returned
product. Please save the original carton and all the
packing materials in case shipping is required. All
products being returned to the factory or service
centre for repairs must be shipped prepaid.

If the repairs made by Void or the Void Authorised
Service Centre are not satisfactory, the Owner
is instructed to give written notice to Void. If the
defect or malfunction remains after a reasonable
number of attempts by Void to remedy the defect
or malfunction, the Original Owner shall then have
the option to elect either a refund or replacement of
said Void product free of charge. The refund shall be
an amount equal to but not greater than the actual
purchase price, not including any taxes, interest,
insurance, closing costs and other finance charges
(minus reasonable depreciation on the product).
If a refund is necessary, the Original Owner must
make the defective or malfunctioning product
available to Void free and clear of all liens or other
restrictions.

Equipment modifications

Technical and design specifications are subject to
change without notice.

Void reserves the right to modify or change
equipment (in whole or part) at any time prior to
delivery thereof, in order to include therein electrical
or mechanical improvements deemed appropriate
by Void, but without incurring any liability to modify
or change any equipment previously delivered, or
to supply new equipment in accordance with any
earlier specifications.

Disclaimer of consequential and incidental
damages

You, the Original Owner, are not entitled to recover
from Void any incidental damages resulting from any
defect in the Void product.

This includes any damage to another product or
products resulting from such a defect.

Warranty alterations

No person has the authority to enlarge, amend, or
modify this Warranty. This Warranty is not extended
by the length of time which the Original Owner
is deprived of the use of product. Repairs and
replacement parts provided pursuant to the Warranty
shall carry only the non-expired portion of the
Warranty.

This Statement of Warranty supersedes all

others contained in this user guide.

2 Limited warranty

Indigo Series User Guide V1.0

Page 6

All Void Acoustics products are carefully manufactured and thoroughly tested before being
dispatched. Your dealer will ensure that your Void products are in pristine condition before
being forwarded to you but mistakes and accidents can happen.

Before signing for your delivery:

• Inspect your shipment for any signs of contamination, abuse or transit damage as soon as
you receive it

• Check your Void Acoustics delivery fully against your order

• If your shipment is incomplete or any of its contents are found to be damaged; inform the
shipping company and inform your dealer.

When you are removing your Indigo Series loudspeaker from its original packaging:

• Indigo Series loudspeakers come double boxed are stapled shut; take care when
unpacking and removing the staples to avoid injury or damage to the loudspeaker

• If you need to place the loudspeaker on a flat surface ensure you use a lint free product to
protect the finish

• When you have removed the Indigo Series loudspeaker from the packaging inspect it to
ensure there is no damage and keep all original packaging in case it needs to be returned
for any reason.

See section 2 for warranty conditions and see section 9 if your product needs service.

3 Unpacking and checking

Indigo Series User Guide V1.0

Page 7

4.1 Welcome

Many thanks for purchasing this Void Acoustics Indigo Series loudspeaker. We truly appreciate
your support. At Void, we design, manufacture and distribute advanced professional audio
systems for the installed and live sound market sectors. Like all Void products, our highly
skilled and experienced engineers have successfully combined pioneering technologies with
ground-breaking design aesthetics, to bring you superior sound quality and visual innovation.
In buying this product, you are now part of the Void family and we hope using it brings
you years of satisfaction. This guide will help you both use this product safely and ensure it
performs to its full capability.

4.2 Indigo Series overview

The visually stunning Indigo Series combines futuristic looks with esoteric audio performance
to bring a newly level of sophistication every venue will want to be seen with. Indigo is the first
range of loudspeakers that has been created for the new heightened awareness in style that
today’s venue designers aspire too. Boundaries are being pushed in all areas of the entertain­ment industry, with the visual aspect becoming evermore important. Indigo not only fulfills
your quest for the ultimate in styling, it will also bring a new level of sonic richness you never
thought possible.

4 About

Indigo Series User Guide V1.0

Page 8

5.1 Indigo 6s

5.1.1 Indigo 6s specifications

Frequency response 70 Hz - 23 kHz ±3 dB
Eciency

1

90 dB 1W/1m
Crossover points 3.2 kHz passive
Nominal impedance 8 Ω
Power handling

2

80 W AES
Maximum output

3

108 dB cont, 111 dB peak
Driver configuration 1 x 6.5” LF, 1 x 1” soft dome tweeter
Dispersion 90°H x 90°V
Connectors Phoenix connector
Height 273 mm (10.7”)
Width 209 mm (8.2”)
Depth 163 mm (6.4”)
Weight 2.2 kg (4.9 lbs)
Enclosure Fibreglass
Rigging 6s wall bracket (supplied)
Finish Smooth cellulose or fine textured matt
Grill Perforated steel with foam filter

1

Measured in half space 2 AES2 - 1984 compliant 3 Calculated

Figure 5.1: Horizontal directivity isobars Figure 5.2: Vertical directivity isobars

5 Specifications and dimensions

Indigo Series User Guide V1.0

Page 9

5.1.3 Indigo 6s dimensions

273 (10.7”)

209 (8.2”)

209 (8.2”)

163 (6.4”)

209 (8.2”)

163 (6.4”)

273 (10.7”)

163 (6.4”)

131 (5.2”)

4-M6

209 (8.2”)

59

(2.3”)

Figure 5.3: Dimensions

5 Specifications and dimensions

5.1.2 Key features

• Ultra-modern appearance for style-led environments

• Wide conical 90°H x 90°V dispersion pattern

• Sculpted fibreglass enclosure

• 6.5” low frequency driver

• 1” soft dome high frequency tweeter

• Dedicated wall bracket, optional subwoofer mount bracket

• High gloss metallic or fine textured matt finish

Indigo Series User Guide V1.0

Page 10

5.2 Indigo 6 Pro

5.2.1 Indigo 6 Pro specifications

Frequency Response 68 Hz - 21 kHz ±3 dB
Eciency

1

93 dB 1W/1m
Crossover Points 2.2 kHz passive
Nominal Impedance 8 Ω
Power Handling

2

200 W AES
Maximum Output

3

115 dB cont, 118 dB peak
Driver Configuration 1 x 6.5” LF, 1 x 1” coaxial high frequency compression driver
Dispersion 90°H x 90°V
Protection HF electronic device
Connectors Phoenix connector
Height 273 mm (10.7”)
Width 209 mm (8.2”)
Depth 163 mm (6.4”)
Weight 5.2 kg (11.5 lbs)
Enclosure Fibreglass
Rigging i6 wall bracket (supplied)

i12 bracket to mount Indigo 6s above Indigo 12 (optional)
Finish Smooth cellulose or fine textured matt
Grill Perforated steel with foam filter

1

Measured in half space 2 AES2 - 1984 compliant 3 Calculated

Figure 5.4: Horizontal directivity isobars Figure 5.5: Vertical directivity isobars

5 Specifications and dimensions

Indigo Series User Guide V1.0

Page 11

5.2.3 Indigo 6 Pro dimensions

273 (10.7”)

209 (8.2”)

209 (8.2”)

163 (6.4”)

209 (8.2”)

163 (6.4”)

273 (10.7”)

163 (6.4”)

44.5

(1.8”)

64.5

(2.5”)

126 (6.4”)

4-M6

209 (8.2”)

Figure 5.6: Dimensions

5 Specifications and dimensions

5.2.2 Key features

• Ultra-modern appearance for style-led environments

• Wide conical 90°H x 90°V dispersion pattern

• Sculpted fibreglass enclosure

• 6.5” low frequency driver

• 1” coaxial high frequency compression driver

• Dedicated wall bracket, optional subwoofer mount bracket

• High gloss metallic or fine textured matt finish

Indigo Series User Guide V1.0

Page 12

5.3 Indigo Sub

5.3.1 Indigo Sub specifications

Frequency Response 40 Hz - 160 Hz ±3 dB
Eciency

1

92 dB 1W/1m
Crossover Points 80 Hz - 160 Hz passive
Nominal Impedance 8 Ω
Power Handling

2

400 W AES
Maximum Output

3

117 dB cont, 123 dB peak
Driver Configuration 1 x 12” LF
Connectors 4 mm binding posts
Height 521 mm (20.5”)
Width 395 mm (15.5”)
Depth 336 mm (13.2”)
Weight 21 kg (46.3 lbs)
Enclosure Fibreglass
Rigging i12 bracket to mount Indigo 6s above Indigo 12 (optional)
Finish Smooth cellulose or fine textured matt
Grill Perforated steel with foam filter

1

Measured in half space 2 AES2 - 1984 compliant 3 Calculated

5.3.2 Key features

• Ultra-modern appearance for style-led environments

• Sculpted fibreglass enclosure

• 12” low frequency driver

• Optional subwoofer mount bracket

• High gloss metallic or fine textured matt finish

5 Specifications and dimensions

Indigo Series User Guide V1.0

Page 13

5.3.3 Indigo Sub dimensions

395 (15.5”)

521 (20.5”)

336 (13.2”)

521 (20.5”)

213 (8.4”) 113.5

(4.5”)

85

(3.4”)

4-M8

395 (15.5”)

336 (13.2”)

395 (15.5”)

336 (13.2”)

Figure 5.7: Dimensions

5 Specifications and dimensions

5.3.4 Indigo Sub impedance graph

10 10020 50

200 500 1k 2k 5k 10k 20k

20

40

60

80

100

Frequency (Hz)

Impedance (Ω)

Figure 5.8: Impedance graph

Indigo Series User Guide V1.0

Page 14

6 Cabling and wiring

6.1 Electrical safety

To avoid electrical hazards please note the following:

• Do not access the inside of any electrical equipment. Refer servicing to
Void-approved service agents

6.2 Cable considerations for fixed installations

We recommend specifying installation-grade Low Smoke Zero Halogen (LSZH) cables for
permanent installations. The cables should use Oxygen Free Copper (OFC) of grade C11000
or above. Cables for permanent installations should be compliant with the following standards:

• IEC 60332.1 Fire retardancy of a single cable

• IEC 60332.3C Fire retardancy of bunched cables

• IEC 60754.1 Amount of Halogen Gas Emissions

• IEC 60754.2 Degree of acidity of released gases

• IEC 61034.2 Measurement of smoke density

We suggest using the following maximum copper cable lengths to keep level losses below 0.6 dB.

Metric mm

2

Imperial AWG 8 Ω load 4 Ω load 2 Ω load

2.50 mm

2

13 AWG 36 m 18 m 9 m

4.00 mm

2

11 AWG 60 m 30 m 15 m

6.3 Phoenix connector

Figure 6.1 shows the rear panel of a Indigo Series loudspeaker with the polarity of the Phoenix
connector labelled. From left to right it is - and + for the feed to the drivers and the - and + for
the link/out.

- + - +

Figure 6.1: Phoenix connector

Indigo Series User Guide V1.0

Page 15

+

-

­+

­+

Passive
Crossover

1” HF

6.5” LF

+

-

6.4 Indigo 6s/Pro wiring diagram

Phoenix pins 1+/1- Phoenix pins 2+/2-

In LF (6.5”) and HF (1”) Link/out

Figure 6.2: Indigo 6s/Pro wiring diagram

6 Cabling and wiring

6.5 Indigo 6s/Pro Bias V3/V9 speakON

TM

wiring

1+
1-

+

-

Figure 6.3: Bias V3

1+
1-

+

-

Figure 6.4: Bias V9

Bias V3/V9 Channel 1
Output LF (6.5”) and HF (1”)
Max output 4 (2 Ω load to amplifier)

Indigo Series User Guide V1.0

Page 16

6 Cabling and wiring

1+
1-

+

-

1+
1-

+

-

Figure 6.5: Bias VQ

Bias VQ Channel 1 Channel 3
Output Left LF (6.5”) and HF (1”) Right LF (6.5”) and HF (1”)
Max quantity per channel 2 (4 Ω load to amplifier) 2 (4 Ω load to amplifier)

6.6 Indigo 6s/Pro Bias VQ speakONTM wiring

6.7 Indigo 6s/Pro Bias D1/Q2 Phoenix wiring

+

-

+

-

Figure 6.6: Bias D1

+

-

+

-

Figure 6.7: Bias Q2

Bias D1/Q2 Channel 1
Output LF (6.5”) and HF (1”)
Max output 4 (2 Ω load to amplifier)

Indigo Series User Guide V1.0

Page 17

6 Cabling and wiring

1+
1-

+

-

Figure 6.8: Bias Q5

Bias Q5 Channel 1
Output Left LF (6.5”) and HF (1”)
Max quantity per channel 4 (2 Ω load to amplifier)

6.8 Indigo 6s/Pro Bias Q5 speakONTM wiring

+

-

­+

­+

12” LF

6.9 Indigo Sub wiring diagram

Phoenix pins 1+/1- Phoenix pins 2+/2-

In LF (12”) Link/out

Figure 6.9: Indigo Sub wiring diagram

Indigo Series User Guide V1.0

Page 18

6 Cabling and wiring

6.10 Indigo Sub Bias V3/V9 speakON

TM

wiring

1+
1-

+

-

Figure 6.10: Bias V3

1+
1-

+

-

Figure 6.11: Bias V9

Bias V3/V9 Channel 1
Output LF (12”)
Max output 4 (2 Ω load to amplifier)

1+
1-

+

-

1+
1-

+

-

Figure 6.12: Bias VQ

Bias VQ Channel 1 Channel 3
Output Left LF (12”) Right LF (12”)
Max quantity per channel 2 (4 Ω load to amplifier) 2 (4 Ω load to amplifier)

6.11 Indigo Sub Bias VQ speakONTM wiring

Indigo Series User Guide V1.0

Page 19

6 Cabling and wiring

6.12 Indigo Sub Bias D1/Q2 Phoenix wiring

+

-

+

-

Figure 6.13: Bias D1

+

-

+

-

Figure 6.14: Bias Q2

Bias D1/Q2 Channel 1
Output LF (12”)
Max output 4 (2 Ω load to amplifier)

1+
1-

+

-

Figure 6.8: Bias Q5

Bias Q5 Channel 1
Output Left LF (12”)
Max quantity per channel 4 (2 Ω load to amplifier)

6.13 Indigo Sub Bias Q5 speakONTM wiring

Indigo Series User Guide V1.0

Page 20

7.1 System design principles

Indigo 6s/Pro loudspeakers can be arrayed as a single pair facing forward to provide a wide
stereo image.

Figure 7.1: Indigo 6s/Pro loudspeakers single pair arrangement

40° 40°

Figure 7.2: Indigo 6s/Pro loudspeaker dual pair arrangement

For applications requiring wide horizontal coverage, use two Indigo 6s/Pro loudspeakers in
pairs, angled at about 40°.

40° 40°

7 System design

For permanent installation, it is recommended to fly Indigo 6s/Pro for more even coverage.
This also allows co-located low frequency enclosures in a single block, increasing sensitivity
and providing more consistent bass coverage.

Figure 7.3: Indigo 6s/Pro permanent instillation

Indigo Series User Guide V1.0

Page 21

7.2 Loudspeaker placement and positioning

When deploying Indigo 6s/Pro, it is important to consider
the speakers’ vertical position to maximise coverage in the
vertical axis. Horizontal loudspeaker dispersion figures dictate
the coverage of the loudspeaker, left to right, to the -3 dB
points. The same can be said for the vertical dispersion figure,
but when applied to a listening area, this figure dictates the
audience area coverage front to back.

Vertical dispersion is often overlooked or not assessed
properly, resulting in ineciently deployed loudspeaker
systems that require more fill loudspeakers than are necessary
to achieve required coverage. Following are some basic
guidelines when considering the vertical position of your
Indigo 6s/Pro loudspeaker.

Figure 7.4a: Vertical dispersion (side view)

Figure 7.4b: Horizontal dispersion (top view)

Figure 7.5: Correct loudspeaker placement

A multi-point loudspeaker system in a club/bar environment can be very pleasing for the
listener. However, it’s important that the processes applied to previous examples are still
implemented. In figure 7.6 you can see the loudspeakers have been positioned and aimed
optimally. When deploying a multi-point loudspeaker system, extra consideration must be
taken to counter unwanted room eects. Careful positioning and aiming of loudspeakers will
minimise room eects, while maintaining even coverage throughout the audience area.

Figure 7.6: Multi point loudspeaker arrangement

With optimum vertical positioning and aiming applied the
loudspeaker system can be used at maximum eciency.
With a point source loudspeaker in this configuration the speaker is placed 2m-4m from the
ground, aimed half way to two thirds of the way back from the audience area, as shown in
figure 7.5. The applied aiming reduces unwanted reflections from the ceiling and directs the
highest energy concentration to the audience area requiring it most. This is the most desirable
position for the loudspeakers in this example.

7 System design

Indigo Series User Guide V1.0

Page 22

Audience

Stage

Figure 7.7: Correct horizontal dispersion

In the horizontal plane rotate the Indigo 6s/Pro loudspeakers toward the audience area at
an angle such that the centre line of the dispersion from each loudspeaker meets about two
thirds of the way towards the rear of the audience area. This will help provide a wider coverage
and result in more of the power being used usefully.

Audience

Stage

Avoid directing the Indigo 6s/Pro loudspeaker straight forward. This will result in a proportion of
the power being directed towards the walls, creating possible reflective issues, as well as causing
a gap in coverage at the centre of the audience area.

Figure 7.8: Incorrect horizontal dispersion

7 System design

Indigo Series User Guide V1.0

Page 23

Figure 7.9: Incorrect loudspeaker placement

Figure 7.10: Incorrect loudspeaker placement

In figure 7.9 the loudspeakers vertical positioning is too low for the audience area. Mid
and high range frequencies are absorbed by the first two rows of people, resulting in poor
coverage and potential acoustic issues from room reflections.

Figure 7.10 shows the loudspeaker vertical position is optimal for the audience area but the
user hasn’t applied an aiming angle. In this case, a large portion of energy is directed at the
ceiling that could result in reduced intelligibility and unwanted room acoustic characteristics.
The shallow angle of attack will also induce refraction issues on a hot dance floor, leading to
reduced HF penetration at mid and far distances, again reducing intelligibility and coherence.

7 System design

Indigo Series User Guide V1.0

Page 24

7.3 Bass alignment - delay times

Note: All information given here is a guide and not a rule. Taking measurement on
site and using your ear are still the most reliable way to achieve the best results.

R

A

B

O

Figure 7.12: Bass alignment example 1

E

A

D

Figure 7.13: Bass alignment example 2

7 System design

Figure 7.13 shows a second low frequency
enclosure added. Here we are looking to create
a secondary focal point at E. To calculate our
delay time we take distance D, which is point
E to the south edge of the circle, away from A,
which is E to the north edge of the circle, and
multiply by the delay time per metre. Or:

(A - D) x 2.9 ms/m = delay time.

All four loudspeakers sit on a circle of radius R
with its centre point at O. The low frequency
enclosure is situated at a distance A from the
origin and a distance B from the circumference
of the circle. The distance B will determine the
delay required for the low frequency enclosure
of 2.9 ms per metre. So, in this example, if the
distance B is 2 m the a delay of 5.8 ms would be
required.

When designing loudspeakers and low frequency
enclosures layout within a space it is often
necessary to apply delay to optimise system
performance. In figure 7.11 we have a room
with four Indigo loudspeakers and single low
frequency enclosure.

Figure 7.11: Loudspeaker layout

Indigo Series User Guide V1.0

Page 25

8 Mounting

8.1 Installation safety

To avoid mechanical hazards, please note the following:

• Safety regulations vary in dierent regions. Full compliance with those
regulations must be your priority

• Rigging must only be undertaken by fully-qualified and experienced riggers who
understand local regulations

• This may include consulting a structural engineer before installation of wall brackets

• Remember that all personnel have a duty of care to themselves, to their assistants, to the
venue sta and to the public

• Before lifting any part of the system above head height, check the whole rig for loose tools
or other items that may fall and cause injury

• Do not use a telephone (even if hands-free) while rigging. Always concentrate fully on the
rigging operation

• Do not rig equipment that is worn, damaged, corroded, mishandled or over-stressed in any way

• Use only Void-approved mounting equipment and accessories

Indigo Series User Guide V1.0

Page 26

8.2 Indigo 6s mounting

Figure 8.1: Indigo 6s bracket

Part required:

• Indigo 6s Bracket

• 4 mm Allen key

Figure 8.2: Bolt removal

Step 1:
Remove both M6 bolts.

Step 2:
Line up the bracket and fix both M6 bolts.

Figure 8.3: Bracket fixing

Indigo Series User Guide V1.0

Page 27

Figure 8.4: Bolt removal

Step 3:
Adjust the bracket to the required orientation
using the bolts and the bracket assembly.

The Indigo 6s bracket is capable of both wall
and ceiling mounting as shown in figures 8.5a
and 8.5b.

Figure 8.5b: Ceiling mounting

Figure 8.5a: Wall mounting

8.2 Indigo 6s mounting

Indigo Series User Guide V1.0

Page 28

8.3 Indigo Sub and 6 Pro mounting

Figure 8.6: Indigo Sub bracket

Part required:

• Indigo Sub Bracket

• 4 mm Allen key

• 5 mm Allen key

Figure 8.7: Bolt removal

Step 1:
Site the Indigo Sub in the desired location and
remove all four M8 bolts from the rear.

Step 2:
Line up the bracket and fix all four M8 bolts.

Figure 8.8: Bracket fixing to Indigo Sub

Indigo Series User Guide V1.0

Page 29

Figure 8.9: Bolt removal

Step 3:
Remove all four M6 bolts from the rear of the
Indigo 6 Pro.

Step 4:
Line up the Indigo 6 Pro with the Indigo Sub
bracket and reattach all four M6 bolts.

Figure 8.10: Indigo 6 Pro mounting

8.3 Indigo Sub and 6 Pro mounting

Step 5:
Ensure all bolts are firmly tightened.

Figure 8.11: Final tightening

Indigo Series User Guide V1.0

Page 30

8.3 Indigo 6 Pro mounting

Figure 8.12: Indigo 6 Pro bracket

Part required:

• Indigo 6 Pro bracket (supplied)

• 4 mm Allen key

• 10 mm spanner/wrench

Figure 8.13: Bolt removal

Step 1:
Remove both M6 bolts from the brackets
assembly.

Step 2:
Attach the rear of the bracket assembly to the wall.

All four bolts must be fitted when
securing the bracket to the wall. Take
care when mounting the bracket
to the wall, making sure to use the
correct fixing and that the wall can
take the load, for example do not
attach the bracket to a stud wall.

Figure 8.14: Rear bracket assembly

Indigo Series User Guide V1.0

Page 31

Figure 8.15: Mounting the loudspeaker

Step 3:
Line the rear bracket assembly with the fixings
and reattach the bolts but do not tighten.

Step 4:
Adjust the vertical angle of the bracket and then
tighten the bolts.

Figure 8.16: Adjusting the vertical angle

8.3 Indigo 6 Pro mounting

Step 5:
Adjust the horizontal angle of the bracket and
then tighten the bolts.

Figure 8.17: Adjusting the horizontal angle

Indigo Series User Guide V1.0

Page 32

Void Indigo series loudspeakers should only be serviced by a fully trained technician.

No user serviceable parts inside. Refer servicing to your dealer.

9.1 Return authorisation

Before returning your faulty product for repair, please remember to get an R.A.N. (Return
Authorisation Number) from the Void dealer who supplied the system to you. Your dealer will
handle the necessary paperwork and repair. Failure to go through this return authorisation
procedure could delay the repair of your product.

Note that your dealer will need to see a copy of your sales receipt as proof of purchase so
please have this to hand when applying for return authorisation.

9.2 Shipping and packing considerations

• When sending a Void Indigo series loudspeaker to an authorised service centre, please
write a detailed description of the fault and list any other equipment used in conjunction
with the faulty product

• Accessories will not be required. Do not send the instruction manual, cables or any other
hardware unless your dealer asks you to

• Pack your unit in the original factory packaging if possible. Include a note of the fault
description with the product. Do not send it separately

• Ensure safe transportation of your unit to the authorised service centre.

9 Service

Indigo Series User Guide V1.0

Page 33

The loudspeaker shall be a passive two-way system consisting of one high power 6.5” (125 mm)
direct radiating, reflex loaded, low frequency (LF) transducer and 1” (25 mm) diameter co-axially­mounted neodymium high frequency (HF) compression driver transducer mounted in a fibreglass
enclosure with smooth cellulose finish.

The co-axial transducer shall be constructed on a cast aluminium frame with the low frequency
transducer consisting of a polycarbonate LF cone with its dust cap removed with a 25.4 mm (1.5”)
voice coil, wound with copper wire on a high quality voice coil former, for high power handling and
long-term reliability. The high frequency transducer shall be bolted through the rear of the magnet
structure belonging to the LF transducer to form a co-axial drive unit. The sound will project through
a machined waveguide that exits in the centre of the low frequency transducer to use the 166 mm
(6.5”) bae diameter to achieve pattern control and low distortion.

Performance specifications for a typical production unit shall be as follows: the usable on-axis
bandwidth shall be 68 Hz to 21 kHz (±3 dB) and shall average 90° directivity pattern for both
horizontal and vertical axis (-6 dB down from on-axis level) from 1 kHz to 12 kHz. Maximum SPL shall
be 118 dB peak measured at 1 m using IEC268-5 pink noise. Power handling shall be 200 W AES
at a rated impedance of 8 Ω. Crossover point shall be at 2.2 kHz using a 4th order filter (24 dB per
octave). The system shall be powered by its own dedicated power amplification module with DSP
management.

The wiring connection shall be via a single removable, lockable wiring connector with four screw­down terminals (one pair for input and one pair for loop-out to another loudspeaker) to provide
secure wiring and allow for pre-wiring of the connector before the installation. This connector
should then screw lock to the enclosure to ensure secure attachment.

The enclosure shall be of a moulded fibreglass reinforced plastic construction with a smooth
cellulose finish and shall include integral threaded inserts for the fitment of wall and ceiling
mounting hardware of any RAL colour with external dimensions of (W) 273 mm x (H) 209 mm x (D)
163 mm (10.7” x 8.2” x 6.4”). Weight shall be

5.2 kg (11.5 lbs).

The loudspeaker shall be the Void Acoustics Indigo 6 Pro.

10 Appendix

Indigo 6 Pro architectural specification

Indigo Series User Guide V1.0

Page 34

The loudspeaker shall be a passive two-way system consisting of one high power 6.5” (125 mm),
direct radiating, reflex loaded, low frequency (LF) transducer and 1” (25 mm) diameter soft dome
tweeter high frequency (HF) transducer mounted in a fibreglass enclosure with a smooth cellulose
finish.

The low frequency (LF) transducer shall be constructed on a cast aluminium frame with treated
paper cone and a 25.4 mm (1.5”) voice coil, wound with copper wire on a high quality voice coil
former, for high power handling and long-term reliability. The high frequency transducer shall
be a soft dome tweeter and shall project it’s sound through a high precision constant directivity
waveguide to achieve pattern control and low distortion.

Performance specifications for a typical production unit shall be as follows: the usable on-axis
bandwidth shall be 70 Hz to 23 kHz (±3 dB) and shall average 90° directivity pattern for both
horizontal and vertical axis (-6 dB down from on-axis level) from 1 kHz to 12 kHz; and a maximum
SPL of 111 dB peak measured at 1 m using IEC268-5 pink noise. Power handling shall be 80 W
AES at a rated impedance of 4 Ω; crossover point at 3.2 kHz using a 4th order filter (24 dB per
octave). The system shall be powered by its own dedicated power amplification module with DSP
management.

The wiring connection shall be via a single removable, lockable wiring connector with four screw­down terminals (one pair for input and one pair for loop-out to another loudspeaker) to provide
secure wiring and allow for pre-wiring of the connector before the installation. This connector
should then screw lock to the enclosure to ensure secure attachment.

The enclosure shall be of a moulded fibreglass reinforced plastic construction with a smooth
cellulose finish and shall include integral threaded inserts for the fitment of wall and ceiling
mounting hardware of any RAL colour with external dimensions of (H) 273 mm x (W) 209 mm x (D)
163 mm (10.7” x 8.2” x 6.4”). Weight shall be

2.2 kg (4.9 lbs).

The loudspeaker shall be the Void Acoustics Indigo 6s.

10 Appendix

Indigo 6s architectural specification

Indigo Series User Guide V1.0

Page 35

The loudspeaker shall be an active system consisting of one high power 12” (304.8 mm),
direct radiating, reflex loaded, low frequency (LF) transducer mounted in a fibreglass
enclosure with smooth cellulose finish.

The low frequency (LF) transducer shall be constructed on a cast aluminium frame with
treated paper cone and a 101.6 mm (4”) voice coil, wound with copper wire on a high quality
voice coil former, for high power handling and long-term reliability.

Performance specifications for a typical production unit shall be as follows: the usable on­axis bandwidth shall be 40 Hz to 160 kHz (±3 dB) and shall have a maximum SPL of 123 dB
peak measured at 1 m using IEC268-5 pink noise. Power handling shall be 400 W AES at a
rated impedance of 8 Ω. Pressure sensitivity shall be 92 dB measured at 1W/1m. The system
shall be powered by its own dedicated power amplification module with DSP management.

The wiring connection shall be via a single removable, lockable wiring connector with four
screw-down terminals (one pair for input and one pair for loop-out to another loudspeaker)
to provide secure wiring and allow for pre-wiring of the connector before the installation.
This connector should then screw lock to the enclosure to ensure secure attachment.

The enclosure shall be of a moulded fibreglass reinforced plastic construction with a
smooth cellulose finish and shall include integral threaded inserts for the fitment of wall and
ceiling mounting hardware of any RAL colour. External dimensions shall be (H) 521 mm x (W)
395 mm x (D) 336 mm (20.5” x 15.5” x 13.2”). Weight shall be 21 kg (46.3 lbs).

The loudspeaker shall be the Void Acoustics Indigo Sub.

10 Appendix

Indigo Sub architectural specification

www.voidacoustics.com

Head Oce

Void Acoustics Research Ltd
Unit 15 Dawkins Road Industrial Estate
Poole
Dorset
BH15 4JY
England

[phone]

[e-mail]

Registered in England & Wales No. 07533536

North America

Void Acoustics North America

503-854-7134

[e-mail]