PowerDual
iQ 18B
USER MANUAL
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CONTENTS
1. Introduction...............................................................................................................5
2. Unpacking.................................................................................................................5
3. Connectors/Cabling.................................................................................................5
4. Polarity Checking.....................................................................................................6
5. Amplification & Power Handling...............................................................................6
6. Operation..................................................................................................................6
7. Equalisation..............................................................................................................7
8. Dimensions..............................................................................................................7
9. Positioning................................................................................................................8
10. Flying......................................................................................................................9
10.1. Flying an iQ 18B............................................................................................10
10.2. Flying Double iQ 18B....................................................................................10
10.3. Flying an iQ 18B with iQ 10...........................................................................11
10.4. Flying Double iQ 18B and iQ 10....................................................................12
11. Performance Data................................................................................................13
12. Technical Specifications......................................................................................14
13. iQ 18B Service Parts and Accessories...............................................................16
14. Warranty...............................................................................................................16
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1. Introduction
Thank You for purchasing Tannoy PowerDual™ iQ i8B.
The iQ 18B is a dedicated sub-woofer designed for high definition sound reinforcement
at low frequencies. It comprises an 18” driver in a horn-loaded cabinet, giving increased
efficiency and improved LF output.
For optimal performance, the iQ 18B has been designed to operate in conjunction with
the iQ 10 mid/high horn-loaded cabinet, where the system is controlled by a dedicated
loudspeaker management system TDX2.
The cabinet is constructed from high quality 18mm birch plywood, featuring handles for
easier transportation, convenient M8 flying points and a pole-mount stand socket that
serves as a base for locating the iQ 10 mid/high speakers in the air.
2. Unpacking
Every Tannoy iQ 18B is carefully tested and inspected before packing. After unpacking,
please inspect your iQ 18B for any damage sustained during transit. In the unlikely
event of any damage, would you please notify your dealer immediately and retain your
shipping carton, as your dealer may ask the faulty unit to be returned for inspection.
3. Connectors/Cabling
The iQ 18B is fitted with two 4-pole Speakon™ connectors. Speakon™ has the
following advantages over EP and XLR type connectors: All terminations are solderless,
making life easier at the time of installation or when field servicing is required. Contacts
will accept 6 sq. mm wire with an outside diameter of up to 15 mm and a current rating
of 30 Amps.
The pins of the two Speakon™ sockets, marked input/output on the rear of the speaker,
are paralleled within the enclosure.
Tannoy has adopted the following wiring standard for iQ 18B: -
SPEAKON™
CONNECTOR
Pin 1+ Positive
Pin 1- Negative
Should you encounter any problems obtaining Speakon™ connectors, please contact
Neutrik or its distributors on the following numbers: -
UK: NEUTRIK MARKETING: 01983 811 441
USA: NEUTRIK USA INC.: 732 901 9488
For a worldwide list of distributors, please contact Neutrik directly on: NEUTRIK AG: +423 237 2424
Or visit their website on http://www.neutrik.com/
Cable choice consists mainly of selecting the correct cross sectional area in relation to
the cable length and the load impedance. A small cross sectional area would increase
the cables series resistance, inducing power loss and response variations (damping
factor).
Connectors should be wired with a minimum of 2.5 sq. mm (12 gauge) cable. This will
be perfectly satisfactory under normal conditions. In the case of very long cable runs
the wire size should exceed this, refer to the following table for guidance: -
SIGNAL
5
CABLE RUN
(m)
10 2.5
25 2.5
50 2.5
100 2.5
4. Polarity Checking
It is most important to check the polarity of the wiring. A simple method of doing this is
to use a pulse based polarity checker for LF units. Connect the speaker leg which you
believe to be connected to Pin 1 to the +
ve
the –
terminal of the amplifier. Check the phase as instructed by the polarity checker
manufacturer. If you have wired it correctly, the polarity checker should indicate the LF
unit is wired in phase, indicating the wiring is correct. If however the polarity checker
indicates negative phase, the input connections must be inverted.
C.S.A. OF EACH
CONDUCTOR (mm)
4.0
6.0
4.0
6.0
4.0
6.0
4.0
6.0
CABLE
RESISTANCE ΩΩ
0.14
0.09
0.06
0.35
0.22
0.14
0.69
0.43
0.29
1.38
0.86
0.58
ve
terminal of the amplifier and likewise Pin 2 to
% POWER LOSS
INTO 8ΩΩ LOAD
1.7
1.1
0.73
4.3
2.7
1.8
8.6
5.4
3.6
17.0
11.0
7.2
% POWER LOSS
INTO 4ΩΩ LOAD
3.5
2.2
1.5
8.6
5.4
3.6
17.0
11.0
7.2
35.0
22.0
14.0
If problems are encountered, inspect the cable wiring in the first instance. It should also
be noted that different amplifier manufacturers utilise different pin configurations and
polarity conventions. If you are using amplifiers from more than one manufacturer,
check the polarity at the amplifiers as well as the loudspeakers.
5. Amplification & Power Handling
As with all professional loudspeaker systems, the power handling is a function of voice
coil thermal capacity. Care should be taken to avoid running the amplifier into clip
(clipping is the end result of overdriving any amplifier). Damage to the loudspeaker will
be sustained if the amplifier is driven into clip for any extended period of time.
Headroom of at least 3dB should be allowed. When evaluating an amplifier, it is
important to take into account its behaviour under low impedance load conditions. A
loudspeaker system is highly reactive and with transient signals it can require more
current than the nominal impedance would indicate.
Generally, a higher power amplifier running free of distortion will do less damage to the
loudspeaker than a lower power amplifier continually clipping. It is also worth
remembering that a high powered amplifier running at less than 90% of output power
generally sounds a lot better than a lower power amplifier running at 100%. An amplifier
with insufficient drive capability will not allow the full performance of the loudspeaker to
be realised.
It is important when using different manufacturers amplifiers in a single installation that
they have very closely matched gains, the variation should be less than ±0.5dB. This
precaution is important to the overall system balance when only a single
compressor/limiter or active crossover is being used with multiple cabinets; it is
therefore recommended that the same amplifiers be used throughout.
6. Operation
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For optimal performance the PowerDual™ iQ 18B has been designed to operate with
PowerDual™ iQ 10 mid/high cabinet, where overall system control is achieved by
utilising the TDX2 system controller. The TDX2 has been factory preset to provide the
recommended cross-over points, delays and overall system balance. Please refer to the
TDX2 manual for operation.
If you intend using an alternative loudspeaker management system (e.g. BSS™, Klark
Teknik™, XTA™ etc) please contact your distributor or visit our website,
www.tannoy.com for the correct parameter settings or refer to the recommended
crossover points in the technical specifications section of this manual.
7. Equalisation
The iQ 18B loudspeaker is designed to need no equalisation or correction to overcome
system limitations. As a result, it will only need equalisation to compensate for difficult
acoustic environments.
Over equalisation can reduce system headroom, and introduce phase distortion
resulting in greater problems than cures. If equalisation is required then it should be
applied gently and smoothly. Violent equalisation will be detrimental to the overall
sound quality.
8. Dimensions
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9. Positioning
When a bass loudspeaker is used in an environment with boundary surfaces, its
placement affects its frequency response. When such effects are properly understood,
they can be used to great effect in producing the desired sound quality without the aid
of additional amplification.
Consider Figure 8a in the diagram below, here we see a loudspeaker in free field or
anechoic conditions. We measure its sound pressure level at a distance D, and refer to
this as our reference level, or 0 dB SPL.
If we now place a large reflective surface (i.e., a wall, ceiling or floor) next to the
loudspeaker, Figure 8b, the sound that is radiated towards the boundary is reflected.
As a result, the sound pressure level can increase by as much as 3dB (effectively
doubling the available amplifier power). The loudspeaker is radiating its power into half
as much space, this is known as half space loading. For each additional boundary, the
SPL can increase by 3dB. Corner placement or eighth space loading can increase a
bass speakers’ efficiency by up to 9dB.
This effect is not the same at all frequencies. Loudspeakers are only essentially omni
directional at low frequencies (where the wavelength is large compared to the
loudspeaker). At high frequencies sound radiates in a more directional manner. We can
position full range loudspeakers next to a boundary in order to boost the lower
frequencies while the highs remain unchanged.
Coupling, or placing bass cabinets together will also increase bass output.
Figure 8a Figure 8b
Figure 8c Figure 8d
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10. Flying
Convenient flying points are provided on the iQ 18B which will allow the optional flying
equipment to be used, as shown in Figure 10a. In the addition to flying the iQ 18B by
itself, it can also be flown in conjunction with Tannoy iQ 10 Mid/High unit. They can
also be configured to be flown double. Please refer to the following sections for more
detailed instructions. A pole mount is also provided for flying a mid/high cabinet in the
air. The optional Eyebolt Set can be used when flying an individual iQ 18B.
The following optional flying kit is available:
1) SR18 Rail Kit
2) SR18/10 Rail Kit
3) JK1 Jointing Kit
4) SCB Beam Kit
5) EBS10 Eyebolt Set
The easy to use system combines flexibility with the highest levels of safety. As with
any flying system, safety can only be guaranteed when all precautions have been
implemented correctly.
NOTE: The installation of this product must be carried out in conformity with
local building codes and standards. If necessary, consult your local safety
standards officer before installing any product. Alternatively, check any laws or
bylaws. Tannoy will not be held responsible for any damage caused by the
improper installation of any flying gear or loudspeaker.
Figure 10a
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10.1. Flying an iQ 18B
To fly the iQ 18B by itself, the following accessories are required: SR18 Side Rail Kit
and SCB Beam Kit.
The flown system is assembled as shown in Figure 10b . The SR18 side rail kit is
screwed to the side of the cabinet using the screws provided (1). The SCB Beam Kits
are then placed above and below the speaker (2). The Lynch Pin is inserted into the
holes of the side rail kit top and bottom (3) and the Pin folded to secure it in place
(Figure 10c ).
Figure 10c
Figure 10b
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10.2. Flying Double iQ 18B
To fly two iQ 18Bs, the following accessories are required: 2 × SR18 Side Rail Kit, 2 ×
SCB Beam Kit and 1 × JK1 Jointing Kit.
The flown system is assembled as shown in Figure 10d. The SR18 side rail kit is
screwed to the side of each cabinet using the screws provided (1). The JK1 Jointing Kit
is slotted between two SCB Beam Kits for both the top and bottom (2). The combined
SCB Beam Kits are placed above and below the speaker (3). The Lynch Pin is inserted
into the holes of the side rail kit top and bottom (4) and the Pin folded to secure it in
place (Figure 10c , page 10).
Figure 10d
10.3. Flying an iQ 18B with iQ 10
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To fly the iQ 18B with the iQ 10 Mid/High unit (with optional trapezoidal cabinet), the
following accessories are required: SR18/10 Side Rail Kit and SCB Beam Kit.
The flown system is assembled as shown in Figure 10e. First, the SR18/10 side rail kit
is screwed to the side of both the iQ 18B and iQ 10 cabinets using the screws provided
(1). The SCB Beam Kits are placed above and below the speaker assembly (2). The
Lynch Pin is inserted into the holes of the side rail kit top and bottom (3) and the Pin
folded to secure it in place (Figure 10f ).
Figure 10f
Figure 10e
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10.4. Flying Double iQ 18B and iQ 10
To fly double combined iQ 18B with the iQ 10 Mid/High unit (with optional trapezoidal
cabinet), the following accessories are required: 2 × SR18/10 Side Rail Kit, 2 × SCB
Beam Kit and JK1 Jointing Kit.
The flown system is assembled as shown in Figure 10g. First, the SR18/10 side rail kit
is screwed to the side of each iQ 18B and iQ 10 cabinet using the screws provided (1).
The JK1 Jointing Kit is slotted between two SCB Beam Kits for botht he top and bottom
(2). The combined SCB Beam Kits are placed above and below the speaker assemblies
(3). The Lynch Pin is inserted into the holes of the side rail kit top and bottom (4) and
the Pin folded to secure it in place (Figure10f, page 12).
Figure 10g
11. Performance Data
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Anechoic Frequency Response, with TDX2 Controller
Impedance Response, Passive
12. Technical Specifications
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Frequency Response (+/- 3dB) 39Hz - 230Hz, (-10dB Point) 33Hz
Recommended Amplifier Power 600 - 1200 watt / 8 ohm
Power Handling Average (2) Programme Peak (10ms)
600 watt 1200 watt 2400 watt
Sensitivity (1)
2.83 volt @ 1m (20-180Hz) 104dB (half space)
Maximum SPL (3) Average Peak
@ 1m 132dB 138dB
Impedance Nominal 8.0Ω
Minimum 7.0Ω
Distortion
10% Full Power 2
100 Hz 1.91% 0.59%
250 Hz 0.78% 1.11%
1% Full Power 2nd Harmonic 3rd Harmonic
100 Hz 0.56% 0.47%
250 Hz 0.37% 0.47%
Driver Complement 1 x 18” (458mm) LF Driver
Crossover Point 70Hz-230Hz, 24dB/Octave
Enclosure Trapezoidal folded horn 18mm birch plywood
Finish Textured black/grey paint
Connectors 2 x Speakon™ NL4MP – in/out
Fittings 4 x Recessed Carrying Handles, 8 x M10 flying inserts
2 x Pullback points
Accessories SR18 Flying Kit, SR1810 Flying Kit, SCB
Dimensions 980mm x 680mm x 540mm (38 9/16 x 26 3/4 x 21 1/4")
nd
Harmonic 3rd Harmonic
Beam Kit
Weight 55kg (121.3lbs)
Shipping Dimensions 1040mm (H) × 700mm (W) × 590mm (D)
41” (H) × 27.6” (W) × 23.2” (D)
Shipping Weight 55 kg
121 lb
NOTES: (1) Average over stated bandwidth. Measured at 1m on axis, in an anechoic chamber.
(2) Long term power handling capacity as defined in EIA standard RS - 426A.
(3) Unweighted pink noise input, measured at 1m
Tannoy operates a policy of continuous research and development. The introduction of new materials or manufacturing
methods will always equal or exceed the published specificat ions which Tannoy reserve the right to alter without prior
notice.
Please verify the latest specifications when dealing with critical applications
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13. iQ 18B Service Parts and Accessories
Part Number Description
7900 0954 Driver Kit Type 4504
7900 0955 Recone Kit Type 4504
8001 2070 SR 18 Side Rail Kit
8001 2080 SR 18/10 Side Rail Kit
8001 2090 JK1 Jointing Kit
8001 2180 SCB Single Cabinet Beam
8001 2190 EBS10 Eyebolt Set
8000 0727 TDX2 Digital loudspeaker management system 60-250V - UK
8000 0728 TDX2 Digital loudspeaker management system 60-250V - EUR
8000 0729 TDX2 Digital loudspeaker management system 60-250V - USA
14. Warranty
No maintenance of the PowerDual™ iQ 18B loudspeaker is necessary.
All Tannoy professional loudspeaker products are covered by a 5-year warranty from the
date of manufacture subject to the absence of misuse, overload or accidental damage.
Claims will not be considered is the serial number has been altered or removed. Work
under warranty should only be carried out by a Tannoy Professional dealer or service
agent. This warranty in no way affects your statutory rights. For further information,
please contact your dealer or distributor in your country. If you cannot locate your
distributor, please contact Customer Services, Tannoy Ltd at the address given below.
Customer Services
Tannoy Ltd.
Coatbridge
ML5 4TF
Scotland
Telephone: 01236 420199 (National)
+44 1236 420199 (International)
Fax: 01236 428230 (National)
+44 1236 428230 (International)
E-Mail: service@tannoy.com
Website: www.tannoy.com
DO NOT SHIP ANY PRODUCT TO TANNOY WITHOUT PREVIOUS AUTHORISATION
Our policy commits us to incorporating improvements to our products through
continuous res earch and development. Please confirm current specifications for critical
applications with your supplier.
EASE Data for Tannoy Professional products available on request.
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Tannoy Limited, Professional Division, Coatbridge, Strathclyde, ML5 4TF, Scotland.
Tel: +44 (0) 1236 420199 Fax +44 (0) 1236 428230
e-mail: prosales@tannoy.com Website: www.tannoy.com
Tannoy / TGI North America Inc. , 335 Gage Avenue, Suite 1, Kitchener, Ontario, Canada N2M 5E1.
Tel: (519) 745-1158 Fax: (519) 745-2364
e-mail: inquiries@tgina.com Website: www.tannoy.com
Tannoy Ne derland b.v., Anthonetta Kuijlstraat 19, 3066 GS Rotterdam.
Tel: (010) 286 0554 Fax: (010) 286 0431
e-mail: info@tannoy.nl Website: www.tannoy.nl
Tannoy is a member of the Group of Companies
ML 6th March 2001
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