T12 & i12
USER MANUAL
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CONTENTS
1. Introduction
2. Unpacking
3. Connectors/Cabling
4. Polarity Checking
5. Amplification & Power Handling
6. Crossovers
7. Equalisation
8. Dimensions
9. Rigging
10. Performance Data
11. Technical Specifications
12. T12 & i12 Recommended Service Parts & Accessories
13. Warranty
14. Wall Mounting Bracket - Assembly Instructions
15. Declaration of Conformity
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1. Introduction
The Tannoy T12 and i12 professional loudspeakers have been designed for a wide variety of
sound reinforcement applications requiring extended frequency response from a compact system,
capable of delivering high sound pressure levels with extremely low distortion, resulting in
outstanding clarity, definition and detail.
The T12 and i12 comprises one 12 inch Dual Concentric driver in which the low frequency (LF)
and high frequency (HF) sources are coincidentally aligned to a point source, resulting in a smooth
uniform frequency response over a wide area of coverage either as a portable stand alone system
or in a multi-cabinet array. The sophisticated CAD designed waveguide combines 60 degree
conical dispersion and excellent acoustic impedance characteristics. As the system is a point
source, clusters and arrays have minimal lobing. These features are inherent and achieved
without the use of any electronic signal processing.
The T12 features a recessed carrying handle, stand mount and a rugged, multiple-ply hardwood
cabinet with structural integrity further enhanced by internal steel braces which double as the flying
points accepting M8 eyebolts strategically placed to distribute the weight of the enclosure evenly.
The T12 can also be used as a low profile stage monitor. Its conical coverage pattern gives the
performer greater freedom of movement than allowed by conventional horn loaded designs.
While delivering the same performance as the T12 and utilising the same transducer and high
power, low-loss crossover components the i12 is designed for fixed installations. Featuring the
same flying system as the T12 the i12 is constructed from medium density fibreboard (MDF), for a
high level of acoustic damping.
For applications requiring extended low frequency enhancement, a range of Tannoy sub-bass
systems are available and can be used in conjunction with the T12 and i12.
2. Unpacking
Every Tannoy T12 and i12 product is carefully inspected before packing. After unpacking your
loudspeaker, please inspect for any exterior physical damage, and save the carton and any
relevant packaging materials in case the loud speaker again requires packing and shipping. In the
event that damage has been sustained in transit notify your dealer immediately.
3. Connectors/Cabling
T12 and i12 are fitted with 4-pole SpeakonÔ connectors. Speakon has the following advantages
over EP and XLR type connectors: All termination’s are solderless, this makes 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 15mm and a current rating of 30 Amps. The pins of the 2 Speakon
sockets identified input/output on the rear of the input panel are paralleled within the enclosure.
Tannoy have adopted the following wiring standard for the T12 and i12 products :-
Pin 1+ is Positive
Pin 1- is Negative
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Should you encounter any problems obtaining Speakon connectors, please contact Neutrik or its
distributors directly on the following numbers:-
UK: NEUTRIK MARKETING:
USA: NEUTRIK USA INC.:
0171 792 8188
(201) 901 9488
For a world wide list of distributors, please contact Neutrik directly:-
+41 7529666
NEUTRIK AG:
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:-
CABLE RUN
(m)
C.S.A. OF EACH
CONDUCTOR (mm)
CABLE
RESISTANCE W
% POWER LOSS
INTO 8W LOAD
% POWER LOSS
INTO 4W LOAD
10
2.5
4.0
6.0
2.5
4.0
6.0
2.5
4.0
6.0
2.5
4.0
6.0
0.14
0.09
0.06
0.35
0.22
0.14
0.69
0.43
0.29
1.38
0.86
0.58
1.7
1.1
0.73
4.3
2.7
1.8
8.6
5.4
3.6
17.0
11.0
7.2
3.5
2.2
1.5
8.6
5.4
3.6
17.0
11.0
7.2
35.0
22.0
14.0
25
50
100
4. Polarity Checking
It is most important to check the polarity of the wiring before the speaker system is flown. A simple
method of doing this without a pulse based polarity checker for LF units is as follows: Connect two
wires to the +ve and -ve terminals of a PP3 battery. Apply the wire which is connected to the +ve
terminal of the battery to the speaker cable leg which you believe to be connected to pin 1+ of the
speaker connector and likewise the -ve leg of the battery to pin 1-.
If you have wired it correctly the LF drive unit will move forward, indicating the wiring is correct. All
that remains now is to connect the +ve speaker lead to the +ve terminal on the amplifier and the -
ve lead to the -ve terminal on the amplifier. If however the LF driver moves backwards, the input
connections need to be inverted.
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.
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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 or the loudspeaker to be realised.
It is important when using different manufacturers amplifiers in a single installation that the 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 active crossover is being used with
multiple cabinets, it is therefore recommended that the same amplifiers are used throughout.
6. Crossovers
The T12 and i12 are supplied as standard for passive operation via the internal crossover network.
If higher peak outputs are required then both models can be used in conjunction with the Tannoy
TX2 controller/crossover which provides high pass filtering and a degree of parametric
equalisation (see performance data section), as well as a fixed crossover point for use with sub-
bass loudspeakers.
7. Equalisation
The T12 and i12 loudspeakers are designed to need no equalisation or correction to overcome
system limitations. As a result, they 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. T12 and i12 loudspeakers are point source, phase coherent designs and violent
equalisation will be detrimental to the overall sound quality.
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7. Dimensions
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8. Performance Data
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11. Technical Specifications
Frequency response (1) +/- 3dB
70Hz - 25kHz
45Hz - 25kHz (with Tx2 controller)
Recommended Amplifier Power
Power Handling
200 - 400 watt / 8 ohm
Average(2) Programme Peak (10ms)
200 watt
400 watt
800 watt
Sensitivity (1)
2.83 volt @ 1m
97 dB
Maximum SPL (3)
@ 1m
Average
120 dB
Peak
126 dB
Impedance
Nominal
8.0 ohm
Minimum
6.1 ohm
DI Averaged (PCQ)
@ 1kHz (ISO)
@ 2kHz (ISO)
@ 4kHz (ISO)
@ 8kHz (ISO)
@ 16kHz (ISO)
8.3, 250 Hz - 16 kHz
7.1
9.3
10.1
12.6
14.2
Q Averaged (PCQ)
@ 1kHz (ISO)
@ 2kHz (ISO)
@ 4kHz (ISO)
@ 8kHz (ISO)
@ 16kHz (ISO)
9.5, 250 Hz - 16 kHz
5.1
8.5
10.2
18.2
26.3
Distortion
0.1 Full Power
250 Hz
2nd Harmonic
0.17%
3rd Harmonic
0.14%
1000 Hz
1.00%
1.25%
10000 Hz
1.78%
0.04%
0.01 Full Power
250 Hz
2nd Harmonic
0.08%
3rd Harmonic
0.06%
1000 Hz
0.32%
0.89%
10000 Hz
0.56%
0.01%
Driver Complement
Crossover Point
1 x 12” (300mm) Constant Directivity Dual Concentric
Type number 3142
Passive 1.5 kHz
2nd order high pass, 2nd order low pass
Halogen HF protection
Enclosure
Finish
38.7 litre vented, 15mm birch plywood (T12), MDF (i12)
Textured black\grey paint
Protective Grille
Connectors
Fittings
Perforated steel, black with 58% free air flow
2 x Speakon NL4MPR IN/OUT
T12: 1 x Recessed carrying handle
T12: 1 x 35mm pole mounting socket
T12/i12: 8 x M8 flying inserts & 1x M8 pullback point
Dimensions
Weight
486mm(H) x 370mm(W) x 385mm(D)
19.13ins(H) x 14.57ins(W) x 15.15ins(D)
20 Kg (44 lbs)
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 operate a policy of continuous research and development. The introduction of new materials or manufacturing methods will always equal or exceed
published specifications which Tannoy reserve the right to alter without prior notice.
Please verify the latest specifications when dealing with critical applications.
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12. T12 & i12 Service Parts & Accessories
Part Number
7900 0433
7900 0441
7900 0199
7300 0158
7900 0442
8000 0644
8000 0647
8000 0648
8000 0630
Description
Driver Kit - 3142
Recone Kit - 3142
HF Diaphragm Kit
Crossover Kit - 1206
Paint - Touch up Black-Grey
Padded Protective Transit Cover (T12)
Flying Kit ( 3 x M8 Eyebolts )
Wall Mounting Bracket
Tannoy TX2 Active System Controller
13. Warranty
No maintenance of the T12 and i12 loudspeakers 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.
Rosehall Industrial Estate
Coatbridge
Strathclyde
ML5 4TF
Scotland
Telephone:
01236 420199
(National)
+44 1236 420199
01236 428230
(International)
(National)
Fax:
+44 1236 428230
(International)
E-Mail:
DO NOT SHIP ANY PRODUCT TO TANNOY WITHOUT PREVIOUS AUTHORISATION
Our policy commits us to incorporating improvements to our products through continuous research
and development. Please confirm current specifications for critical applications with your supplier.
EASEÔ Data for Tannoy Professional products available on request.
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14. Wall Mounting Bracket - Assembly Instructions
A dedicated wall mounting bracket (Part No. 8000 0648) is available for the T12 & i12.The design
of the bracket allows the loudspeaker to mounted either in portrait or landscape orientation:-
Landscape mounting - Remove two of the original M8 countersunk screws on one side of the
cabinet, place the T- Bar in position and fix in place using the two cap- head bolts which are
included along with the bracket hardware, remembering to use the washers and locking washers
which are also provided. Assemble the bracket as shown on the diagram below. It is imperative
that the bracket is fixed soundly to the wall. Be sure to use the correct fixings (e.g. Rawbolt,
Rawplug) according to the wall type.
Portrait mounting - Using a hacksaw, cut along the indents on the T-bar. Carry out the above
instructions, removing two of the original M8 countersunk screws on top of the cabinet.
Exploded View of Bracket
Assembled View of Bracket
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Declaration of Conformity
The following apparatus is/are manufactured in the United Kingdom by Tannoy Ltd of Rosehall
Industrial estate, Coatbridge, Scotland, ML5 4TF and conform(s) to the protection requirements
of the European Electromagnetic Compatibility Standards and Directives relevant to Domestic
Electrical Equipment. The apparatus is designed and constructed such that electromagnetic
disturbances generated do not exceed levels allowing radio and telecommunications equipment
and other apparatus to operate as intended, and, the apparatus has an adequate level of
intrinsic immunity to electromagnetic disturbance to enable operation as specified and intended.
Details of the Apparatus:
Tannoy Contractor Loudspeaker
Model Number: T12/i12
Associated Technical File:
Applicable Standards:
EMCT12/i12
EN 50081-1 Emission
EN 50082-1 Immunity
Signed:
Position:
Date:
Technical Manager
Tannoy Professional
16th July 1998
For Tannoy Ltd
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Tannoy Loudspeakers are manufactured
in Great Britain by :
Tannoy Ltd, Rosehall Industrial Estate, Coatbridge,
Strathclyde, ML5 4TF, SCOTLAND
Telephone: +44 (0)1236 420199 Fax: +44 (0)1236 428230
Tannoy North America Inc. 335 Gage Avenue, Suite 1, Kitchener, Ontario, CANADA, N2M 5E1
Telephone: (519) 745 1158 Fax: (519) 745 2364
Tannoy Nederland BV, Anthonetta Kuijlstraat 19, 3066 GS, Rotterdam THE NETHERLANDS
Telephone: (010) 2860554 Fax: (010) 2860431
Issue 3 Part No. 6481 0266
GH 14th April 1997
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