TOA Electronics TDX2 User Manual

TDX2

USER MANUAL

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Tannoy TDX2 Quick reference

To access a channel press the appropriate channel’s ‘GAIN’ button. When you
press the button once you will get that channel’s gain screen. To scroll through a
channels’ parameters, use the ‘BACK’ and ‘NEXT’ keys. (If you press the gain
button a second time, you will get the last parameter viewed. A third press will take
you back to the default screen.)

To enter the menus, press the ‘MENU’ key. Use the ‘BACK’ and ‘NEXT’ keys to
take you to the sub-menu you require. ‘ENTER’ will take you into the sub-menu you
have selected. Use the ‘BACK’ and ‘NEXT’ keys to select the menu you require.
Press ‘ENTER’ to take you into the menu selected. ‘BACK’ and ‘NEXT’ will then
select the menu options. Use ‘ENTER’ to confirm selection.

MENUS:

X-over Sub-Menu: Used for storing and recalling X-overs including format, output

EQ, output delay, output gain and limiter settings. Also used for designing a new X­over.

Input Sub-Menu: Used for ganging inputs.
Security Sub-Menu: Used for locking various features of the unit with a unique 4

digit code.
System Sub-Menu: Used to view reports of the units status. Other options include

whether the parameters are displayed in Q or bandwidth and if the meters are pre
or post mute.

Interface Sub-Menu
AES/EBU Sub-Menu

Notes:

1. The X-over (output) settings are stored / loaded independently (using ‘store /
load a X-over’) from the input settings (using ‘store / load input memory’).

2. The output meters show level, in dB’s, from limiter threshold. The input meters
show level, in dB’s, from input clip.

3. HPF’s and LPF’s are defined independently on each channel.

4. To get access to the limiter attack and release, select ‘Auto Limiter TC’ No,
when designing a X-over

5. To show parametric filters in bandwidth (‘BW’), rather than Q, go into the
‘system sub-menu’, select ‘filter Q or BW’, select BW.

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Contents

Important Safety Information.................................................................................................7

1. Introduction .......................................................................................................................8

2. Unpacking the TDX2..........................................................................................................8

3. General Overview and Features........................................................................................8

3.1. Features......................................................................................................................8

4. Front Panel Functions .....................................................................................................10

5. Rear Panel Functions......................................................................................................11

6. Operating the TDX2.........................................................................................................12

6.1. Preliminary Set-up ....................................................................................................12

6.2. Loading a factory preset. ...........................................................................................12

6.3. Designing your own crossover...................................................................................12

6.4. Menu Selections .......................................................................................................13

7. TDX2 Configurations.......................................................................................................14

7.1. Introduction...............................................................................................................14

7.2. Crossover Modes......................................................................................................14

7.3. Filter slopes ..............................................................................................................14

7.4. Time Alignment.........................................................................................................14

7.5. Block Diagrams of X-Over modes.............................................................................16

7.6. Output Limiters .........................................................................................................19

8. Function Screens.............................................................................................................20

8.1. Parametric Equaliser Screen.....................................................................................20

8.2. High and Low pass filter Screens ..............................................................................21

8.3. Limiter Screen...........................................................................................................22

8.4. Delay Screen ............................................................................................................23

8.5. Polarity Screen .........................................................................................................23

8.6. Gain Screen ..............................................................................................................24

9. Menu Options..................................................................................................................25

9.1. X-over Sub-Menu......................................................................................................25

9.2. Input Set-up Sub-Menu .............................................................................................25

9.3. Security Sub-Menu....................................................................................................25

9.4. System Sub-Menu.....................................................................................................26

9.5. Interface Sub-Menu...................................................................................................26

9.6. AES / EBU Sub-Menu...............................................................................................27

10. Equalisation Curves.......................................................................................................28

11. Specifications................................................................................................................30

12. Operating Notes ............................................................................................................31

12.1. Operating Level ......................................................................................................31

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12.2. Grounding...............................................................................................................31

13. Warranty .......................................................................................................................32

14. Appendices....................................................................................................................33

14.1. Appendix 1 : Limiter threshold .................................................................................33

14.2. Appendix 2: Default Xover Settings .........................................................................34

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An example of this equipment has been tested and found to
comply with the following European and international
Standards for Electromagnetic Compatibility and Electrical

Safety:

Radiated Emissions (EU): EN55013-1 (1996)
RF Immunity (EU): EN55103-2 (1996) RF Immunity, ESD, Burst Transient, Surge, Dips &Dwels
Electrical Safety (EU): EN60065 (1993)

Important Safety Information

Do not remove Covers. No user serviceable parts inside, refer servicing to
qualified service personnel.

This equipment must be earthed.

CAUTION

RISK OF ELECTRIC SHOCK

DO NOT OPEN

DO NOT EXPOSE TO RAIN OR

MOISTURE

ATTENTION

RISQUE DE CHOC ELECTRIQUE

NE PAS ENLEVER

NE PAS EXPOSER A LA PLUIE NI A

L’HUMITE

It should not be necessary to remove any protective earth or signal cable
shield connections.

Do not defeat the purpose of the polarized or grounding-type plug. A
polarized plug has two blades with one wider than the other. A grounding
type plug has two blades and a third grounding prong. The wider blade and
the third prong are provided for your safety. When the provided plug does
not fit into your outlet, consult an electrician for replacement of the obsolete
outlet.

Only use this equipment with an appropriate mains cord.
In the USA the cord should comply with the requirements contained in the

Standard for Cord Sets and Power Supply Cords, UL 817, be marked VW-1,
and have an ampacity rating not less than the marked rating of the
apparatus.

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1. Introduction

Thank you for choosing the Tannoy TDX2 loudspeaker system controller for your
application.

The TDX2 is an advanced digital electronic controller intended to optimise the
performance of Tannoy loudspeaker systems.

This manual explains how to configure the TDX2 to be tailored to your specific
application. As well as technical specifications it also contains some helpful advice
on how to use this controller and how to obtain the best possible performance from
this unit. Please spare a little time to read the contents of this manual so that you
obtain the best possible performance from this unit.

2. Unpacking the TDX2

Before your TDX2 Digital Controller left the factory, it was inspected and tested to
make sure it reaches you in perfect condition. Would you please, however, check
your TDX2 to make sure no damage has occurred in 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 you to return the faulty unit to him for
inspection.

3. General Overview and Features

The TDX2 is a compact and powerful DSP based audio-processing unit, ideally
suited for live applications, where it combines the functions of multiple conventional
products in a compact 1U high unit. For ease of use, the TDX2 is factory set for
operation with Tannoy products. In addition to this, 19 user memories are available.
The latest preset files and Tannoy parameters can be obtained from your distributor
or from the Tannoy website www.tannoy.com.

The TDX2 has 2 inputs and 6 outputs, which can be configured in 5 basic modes, 2
x 2 way, 2 x 3 way, 4 way, 5 way and 6 way crossover. Each input has gain and
delay and each output consists of a high and low pass filter, 5 bands of parametric
equalisation, limiter, delay, gain and polarity controls. A multi-level security ‘lock­out’ function is available for these controls.

The TDX2 is also available with optional AES/EBU inputs and outputs. The TDX2 is
designed for quick adjustment via easy-to-use front panel controls.

3.1. Features

• Superb audio quality: Carefully optimised Double Precision processing plus 40

bit internal data path for exceptional dynamic range and sonic quality.

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• A flexible 2 input, 6 output multi-mode format featuring a choice of 2 x 2 way, 2

x 3 way, 4 way, 5 way and 6 way crossover modes with limiters.

• Each parametric section provides +15dB to -30dB of gain at centre frequencies

between 20Hz - 20kHz with a wide range of Qs from 0.4 to 128. All parameters
feature fine resolution with 1/36th octave frequency steps, 0.1dB gain
increments and 100 Q settings. Any parametric section can be set for LF & HF
shelving response.

• Six high performance limiters are provided, featuring a wide range of control

over Attack, Release and Threshold parameters. The output meters shows
headroom to the limit threshold. The meter time constants track the limiter time
constants to show precise power usage.

• Variable High and Low pass filters for each output can be set for 12, 18 and

24dB per octave slopes with a choice of Bessel, Butterworth or Linkwitz-Riley
responses. Independent control over High & Low pass functions allows
asymmetric crossover functions to be realised.

• Three velocity-sensitive rotary encoders provide a familiar and easy to use

control format with all filter information displayed simultaneously on a backlit
LCD display.

• Delay of up to 650mS can be independently set for each output with a minimum

increment of 2.6µS.

• Comprehensive standard specification includes 19 user memories and Tannoy

preset memories.

• The TDX2 provides exceptional audio quality with a full >110dB dynamic range,

high sampling rate and minimal filtering.

• AES / EBU digital inputs and outputs are available as an option.

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4. Front Panel Functions

1. LCD Display - Shows menu options, output information and various
parameters being adjusted.

2. Gain Keys - Two input and six-output ‘gain’ keys allow instant access to the
gain screen for each channel. When a channel is selected the accompanying
LED lights up. Pressing a second time selects the last function edited.

3. Next Key - Moves the display forwards through the list of available parameters
for the current input or output channel.

4. Back Key - Moves the display backwards through the list of available
parameters for the current input or output channel.

5. Menu Key - Activates the main menu on the LCD display. Pressing a second
time selects the last menu edited. Different menus are selected by pressing the
‘BACK’ and ‘NEXT’ keys or using the ‘FREQ’ control.

6. Enter Key - Enters the chosen menu and confirms menu selections.

7. Quit Key - Exits the menu.

8. Bypass Key - Allows the currently displayed parametric section to be
bypassed. (Note: The High pass / Low pass filters and limiters can not be
bypassed.)

9. Parameter Controls - The three velocity sensitive rotary encoders allow the
relevant parameter, on the LCD screen, to be adjusted.

10. Input Meters - Displays available headroom before input clipping occurs. The
bottom 2 LEDs (green and yellow) are set at -24dB and -6dB below clipping.
The top, red LED displays digital overflow and can therefore light without all the
other LEDs becoming illuminated.

11. Output Meters - Displays headroom before limiting occurs. The bottom two
LEDs display between -24dB and -6dB of input headroom. The top, red LED
indicates 4dB of limiting.

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12. Mute Keys – Six output mute keys with LED indicator.

5. Rear Panel Functions

1. Power Switch.

2. Mains Fuse - Located in a finger-proof fuse holder adjacent to the mains inlet.
Always replace this fuse with the correct type as shown on the rear panel
legend. (N.B. A spare fuse is located in this holder.)

3. Mains Power - Connected via a standard IEC socket. A compatible power
cord is supplied with the unit.

4. External - RS232 via a 9-pin DIN DEE socket, for connection to a PC.

5. XLR Inputs and Outputs - 3 pin XLR connectors are provided for each audio
input and output. All terminations are fully balanced, pin 2 Hot, pin 3 Cold and
pin 1 Screen (shield).

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6. Operating the TDX2

6.1. Preliminary Set-up

The following procedure should be followed when first installing the TDX2.
Connect the unit to a mains outlet with the mains cable provided, via the IEC

connector located on the back of the unit. The unit is switched on by flicking the
power switch. The unit will take several seconds to load.

The menu is accessed by pressing the ‘MENU’ key. The relevant sub-menus are
selected by using the ‘BACK’, ‘NEXT’ and ‘ENTER’ keys as described in the
sections below.

6.2. Loading a factory preset.

Press ‘MENU’ and use the ‘BACK’ and ‘NEXT’ keys to select ‘Xover’ on the
screen. Press ‘ENTER’. Display ‘Load a Xover’ using the ‘BACK’ and ‘NEXT’ keys,
and press ‘ENTER’ to select. Select the desired crossover by pressing ‘BACK’ and
‘NEXT’ keys. Once the desired crossover is displayed, press ‘ENTER’. The
crossover will load automatically.

6.3. Designing your own crossover.

Press ‘MENU’ and use the ‘BACK’ and ‘NEXT’ keys to select ‘Xover sub-menu’ on
the screen. Press ‘ENTER’. Use the ‘BACK’ and ‘NEXT’ keys to select ‘Design a
Xover’, then press ‘Enter’ to select. Follow the set-up wizard to design your
crossover. The menu functions will be explained in the Section 9.

When in a menu use the ‘BACK’ and ‘NEXT’ keys to display menu options. When
the required menu is shown, press ‘ENTER’ to confirm selection. The current
selection will be marked by a ‘ * ’ star.

To program each individual channel, press the ‘GAIN’ button on the relevant
channel. The channel data will then be displayed. Use the ‘BACK’ ,‘NEXT’,
‘ENTER’, ‘FREQ’, ‘Q’ and ‘GAIN’ keys to select HPF, LPF, parameters etc. See

Section 8 for more information on Function screens.

When designing a new crossover the HP and LP filters will be set to their defaults,
see appendix 2.

If no action is taken in the menu mode the unit will return to normal 'default' mode.
Repeat above instructions to return to menu mode.

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6.4. Menu Selections

The following menu selections are available. To access menus, see instructions
under preliminary set-up above.

Xover Sub-Menu:

Load a Xover: Loads a pre-defined crossover.
Design a Xover: Set-up wizard for designing a crossover.
Store a Xover: Stores all output settings as a defined crossover.
Erase a Xover Mem: Erases a Xover from the list

Input Set-up Sub-Menu:
Allows ganging of inputs.

Security Sub-Menu: Locks the unit with a unique user defined 4 digit code. 4
options are available: changes only, changes + view, changes + mutes, everything.

Caution: Do not enter this menu option before reading and understanding
the instructions in section 9.4, Security Sub-menu on page 24.

System Sub-Menu:

System Status: Displays unit information including software version and
temperature.

LCD Contrast: Adjusts LCD contrast.
LED Brightness: Adjusts LED brightness.
Temperature Alarm: Sets a temperature warning value in Centigrade.
Wake-up Time: Sets the unit wake-up time and whether or not the unit starts up in

mute.

Output Meters: Selects output meters to be pre or post mute.
Filter Q or BW: Selects whether Q or bandwidth is displayed in the parametric

screens.
Delay Time/Distance: Selects whether delay is set in time in ms or distance in

metres.

Interface Sub-Menu:
External Mode: Selects baud rate.

AES / EBU Sub-Menu:

Routing options: Selects various routing options if installed.
AES diagnostics: Shows the complete status of the input AES signal. Available only

if the AES option is fitted.

(For more in-depth information on menu functions, refer to

Section 9 page 25.)

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7. TDX2 Configurations

7.1. Introduction

To simplify set-up of the TDX2, 5 crossover modes are menu selectable. These all
have parametric equalisers, high and low pass filters, limiters, gain and delay. For
detailed information on these modes please study the block diagrams along with
the following descriptions. 2 x 3 way and 2 x 2 way crossover modes have the
option available to provide precise 'ganged' parameter adjustment for stereo
sources.

7.2. Crossover Modes

Please see block diagram. All crossover modes feature adjustable crossover
frequencies with a choice of slopes, 5 bands of driver compensation E.Q. per
output and delay time plus limiters for each output. Phase reverse is provided for
each output.

7.3. Filter slopes

A choice of Bessel or Butterworth slopes at 12/18/24dB per octave and Linkwitz­Riley at 24dB per octave are provided. Since Low and High pass functions are
separately adjusted, asymmetric slopes are easily achieved, if required. It should
also be noted that the turnover frequency displayed on the TDX2 is the -3dB point
for all slopes except 24dB Linkwitz-Riley where the -6dB point is shown. If the -6dB
point is to be used for the Bessel or Butterworth filter, take the required crossover
frequency, multiply this by the appropriate factor from the following table and then
select the closest available frequency on the TDX2’s display.

Filter Type High pass filter factors Low pass filter factors

Bessel 12dB/octave 1.45 0.69
Butterworth 12dB/octave 1.31 0.76
Bessel 18dB/octave 1.37 0.73
Butterworth 18dB/octave 1.19 0.84
Bessel 24dB/octave 1.35 0.74
Butterworth 24dB/octave 1.15 0.87

Please note that unlike conventional analogue crossovers, crossover points and
slopes are set with absolute accuracy since component tolerance problems do not
occur.

7.4. Time Alignment

A further advantage of the TDX2 over conventional products is the provision of an
independently adjustable delay section for each output. This allows the true arrival
time from multiple drivers to be aligned precisely rather than relying on the
compromise 'phase adjust' approach. Delay time can be input in either time or

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distance (System Sub-menu) and is adjustable in 2.6µS steps (1mm), or in 0.8mm
(or 0.003 feet) steps.

Alternatively, to convert from units of time (i.e. milliseconds) to units of distance
use the following formula, or change the input method in ‘delay time/distance’ in the
System Sub-Menu.

1 millisecond = 343mm (1.126ft) @ 20°C (68°F)
or to calculate time delay for a known distance, use:
Time delay = Distance in meters

20.06 x √(273+°C)
Were °C is the temperature in °C.
Or to simplify this equation at 20°C.
Delay time in milliseconds = Distance in meters x 2.192.
Or delay time in milliseconds = Distance in feet x 0.955
(N.B. Centigrade = (Fahrenheit –32) x 0.5555.

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7.5. Block Diagrams of X-Over modes

Tannoy TDX2 2×2 Way + 2 × Mono Sum X-Over

Tannoy TDX2 2×3 Way X-Over

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Tannoy TDX2 4 Way + 2 X-Over

Tannoy TDX2 5 Way + 1 X-Over

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Tannoy TDX2 6 Way X-Over

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7.6. Output Limiters

High performance digital limiters are provided for each output with control over
attack time, release time and threshold level parameters (see Section 8.2, page

22). This level of control allows the user to balance the required subjective quality

of the limiter against the driver protection requirements. It also means that an
incorrectly set limiter may sound awful! In particular, as with all limiters, using too
fast an attack or release time will result in excessive low frequency distortion. In
‘design a crossover’ sub-menu there is an option for automatic limiter time
constants. In this mode the time constants will be automatically set from the High
pass filter frequency. See table below.

7.7. Table of automatic attack and release times.

The time constants are set by the high pass filter frequency for that channel.

High pass filter Auto attack time Release

<10Hz – 31Hz 45mS x16 (720mS)

31Hz – 63Hz 16mS x16 (256mS)

63Hz – 125Hz 8mS x16 (128mS)
125Hz – 250Hz 4mS x16 (64mS)
250Hz – 500Hz 2mS x16 (32mS)

500Hz - 1kHz 1mS x16 (16mS)

1kHz – 2kHz 0.5mS x16 (8mS)

2kHz – 22kHz 0.3mS x16 (4mS)

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8. Function Screens

8.1. Parametric Equaliser Screen

All modes feature a total of 30 bands of fully flexible parametric equalisation (5 per
output), with all sections selectable to Low or High frequency shelving response.

Each parametric section can be positioned at a frequency from 20Hz to 20kHz and
features a wide range of 'Qs’ to produce response curves ranging from broad to
notch. The gain control ranges from +15dB to -30dB in 0.1dB steps. Frequency
steps are in 1/36 octave resolution for precise control. Since all filtering is achieved
in DSP, all settings are re-settable with absolute accuracy and in ganged mode
parameters track identically. Very narrow band notch filters (maximum Q of 128)
can be achieved and unlike analogue filters these 'tight' Q filters are entirely stable.
The maximum notch depth is -30dB.

OP1+4 Low PEQ: 1 Ο
1K00Hz B=.34 0.0dB

Parametric filters are carefully implemented using Double Precision processing.
This method is costly in terms of processing power but yields substantial benefits in
terms of the TDX2’s exceptional noise performance and greatly improved low
frequency stability.

To adjust parametric settings:

Select relevant channel by pressing the channel ‘GAIN’ button.
Use the ‘BACK’ and ‘NEXT’ keys to select relevant parameter screen.
Use the ‘FREQ’ control to adjust the frequency.
Use the ‘Q’ control to adjust Q.
Use the ‘GAIN’ control to adjust the gain.
(N.B. To show parametric filters in bandwidth (BW) rather than Q, go into the

‘system sub-menu’, select ’filter Q or BW’, select BW.)

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8.2. High and Low pass filter Screens

< 10Hz Bessel 24dB

OP1+4 Low HPF

Each output has an independent high pass filter and an independent low pass filter.
Both filters have a range of selectable slopes, which are Bessel 12dB, 18dB and
24dB, Butterworth 12dB, 18dB and 24dB, and Linkwitz-Riley 24dB.

High pass filters have a range of <10Hz (through) to 16kHz and Low pass filters
have a range of 22kHz (through) to 35.1Hz in 1/36 octave steps.

HPFs and LPFs can be asymmetrical set.

To adjust HPF/LPF settings:

Select relevant channel by pressing the channel ‘GAIN’ button.
Use the ‘BACK’ and ‘NEXT’ keys to select HPF and LPF screens.
Use the ‘FREQ’ control to adjust the frequency.
Use the ‘Q’ control to select the slope.
Note: The low pass filter frequency cannot be set lower than the high pass filter

frequency and vice versa.

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8.3. Limiter Screen

Atk:4.0mS Rx16 +22dB

OP2+5 Mid Limiter

Each output has an independent high performance limiter.

All limiters have an attack range of 0.3mS to 90mS, release times are 4, 8, 16 and

32 times the attack time and thresholds range from +22dB to –10dB in 1dB steps.

If the automatic limiter time constant option is in use, all limiter screens will say

‘automatic’ and the time constants will be set from the High pass filter frequency. A

table of dB to Vrms is in appendix 1.
The output meters are linked to the time constants of the limiters so true output

metering is achieved.

To adjust the limiter settings:

Select relevant channel by pressing the channel ‘GAIN’ button.
Use the ‘BACK’ and ‘NEXT’ keys to select the limiter screen.
Use the ‘FREQ’ control to adjust the attack time.
Use the ’Q’ control to adjust the release time.
Use the ‘GAIN’ control to adjust the limiter threshold.

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8.4. Delay Screen

Polarity = [ + ]

Delay = 1.003mS

OP1 Low

Each output has an independent delay time control. This can be adjusted in 2.6µs

steps and in 1ms steps giving complete control over driver time alignment.

Input delay (base delay) is adjustable in 1ms steps only.

To adjust the delay settings:

Select relevant channel by pressing the channel ‘GAIN’ button.

Use the ‘BACK’ and ‘NEXT’ keys to select the delay screen.

Use the ‘FREQ’ control for coarse control. (1mS steps)

Use the ‘Q’ control for fine control. (2.6µS steps)

(N.B. To show delay in distance (mm or feet) rather than time, go into the ‘system

sub-menu’, select ’DelayTime/Distance’, select ‘Metres’ or ‘Feet’.)

8.5. Polarity Screen

OP1 Low

Each output has an independent polarity screen. This gives the flexibility to reverse

the phase of individual outputs (rotate by 180°).
(N.B. When the outputs are ganged, the polarity screens remain individual.)

To adjust the polarity:

Select relevant channel by pressing the channel ‘GAIN’ button.
Use the ‘BACK’ and ‘NEXT’ keys to select the polarity screen.
Use the ‘GAIN’ control to toggle between + and -.

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8.6. Gain Screen

Gain = 0.1dB

O/P1+3 LOW

Each output and input has an individual gain screen. The outputs have a range of

+15dB to –40dB, adjustable in 0.1dB steps and the inputs have a range of +6dB to

–40dB, again adjustable in 0.1dB steps.

To adjust the gain:

Select relevant channel by pressing the channel ‘GAIN’ button.

Use the ‘BACK’ and ‘NEXT’ keys to select the gain screen.

Use the ‘GAIN’ control to adjust the gain in dB.

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9. Menu Options

9.1. X-over Sub-Menu

Press 'MENU' and select X-over Sub-menu using the ‘BACK’, ‘NEXT’ and

'ENTER' keys. Four options are available in this sub-menu which are:

Load a Xover : Loads a stored crossover. This includes factory preset files.

Updates can be obtained from your distributor or from the Tannoy website,

www.tannoy.com

Design a Xover: Opens a wizard to design a crossover. Options include format

type, ganging of outputs, routing and automatic limiter time constants.

Store a Xover: Stores a X-over (all output settings) to one of 19 user memories.

Crossovers can be named with a user defined name of up to 16 characters which

will be displayed on the default screen. To do this, select the memory number by

using the ‘FREQ’ and ‘ENTER’ keys, and enter the name by using the ‘FREQ’ to

select a character and the ‘BACK’ and ‘NEXT’ keys to move to scroll between the

characters. Press ‘ENTER’ to confirm the X-over name.

Erase a Xover Mem: Erases a selected X-Over from memory.

9.2. Input Set-up Sub-Menu

Press ‘MENU' and select ‘Input’ Sub-menu using the ‘BACK’ and ‘NEXT’ keys.

Press ‘ENTER’ to confirm. There is only ‘Gang Inputs’ in this menu. This gangs A

and B inputs so that precise adjustments can be made to both inputs

simultaneously.

9.3. Security Sub-Menu

Press 'MENU' and select Security Sub-menu using the ‘BACK’, ‘NEXT’ and

'ENTER' keys. Press 'ENTER' to load one of the four selections. (See below) A

four-digit security code will then be asked for. This can be entered by using the

‘FREQ’ control, to select a character, and the ‘BACK’ and ‘NEXT’ keys to move to

the next character. Additionally, the ‘GAIN’ keys can be used to enter a code by

pressing any combination of the eight buttons. Each ‘GAIN’ key represents its

channel labelling, so any combination of A, B, 1, 2, 3, 4, 5 and 6 can be used as a

code. The is entered twice, for confirmation.

Lock options:

User Specific: This option locks parameters specified by the user, including gains,

delays, PEQs, limiters, HP & LP filters, phase, trim mute, as well as menu system

and memory store and recall.

Xover Only: This option locks all the crossover parameters, except trim and mute.

Xover + Trim: This option locks all the crossover parameters, except mute.

Xover + Trim + Mute: This option locks all crossover parameters, including mute.

Changes only: This option locks all parameters so that no changes can be made,

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including all menus.

Changes + view: This option locks all parameters and the viewing of them on the

LCD including all menus.

Changes + mutes: This option locks all parameters, including all menus, and

disables all mute keys.

Everything: This option locks all parameters and the viewing of them, including all

menus, and disables all mute keys.

To 'unlock' the security system, press the 'MENU' key and enter correct code.

IMPORTANT - Please Note that once the security system is initiated only re-

entering the correct code will 'unlock' the TDX2s’ functions. Please note the code! If

the security code number is inadvertently lost contact your local Tannoy sales

office.

9.4. System Sub-Menu

Press 'MENU' and select X-over Sub-menu using the ‘BACK’, ‘NEXT’ and

'ENTER' keys. Several options are available in this sub-menu:

System Status: Displays unit information including software version and

temperature. Curr. Temp. = current temperature in degrees Celsius.

Max1. Temp. = maximum temperature this session.

Max2. Temp. = maximum temperature ever reached.

LCD Contrast: Adjusts the LCD contrast from 0 to 100.

LED Brightness: Adjusts the LED brightness from 1 to 15.

Temperature Alarm: Sets a temperature warning between 20 and 80°C. The

default screen will flash ‘ALARM. Temp = n°C’ when the specified temperature is

reached. (N.B. the warning does not affect the units’ performance in any respect.)

Wake-up Time: Sets how the unit starts up with one of the following options.

0 to 60 seconds: Waits the specified time before unit wakes up.

Mute hold: Turns on and holds all output mutes when turned on.

(N.B. Wake-up is a slow ramp in level for about 5 seconds.)

Output Meters: Selects whether the output meters are pre or post mute.

Filter Q or BW: Selects whether ‘Q’ or Bandwidth is displayed in the parametric

screens.

Delay Time / Distance: Selects whether time delay is displayed in time (ms),

distance (metres or feet).

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9.5. Interface Sub-Menu

Press 'MENU' and select X-over Sub-menu using the ‘BACK’, ‘NEXT’ and

'ENTER' keys.

Interface Set-up: Opens a wizard to configure the remote interface. This allows for

the RS232 Baud rate to be adjusted to one of the following values: 2400, 4800,

9600, 19200 or 38400. (This should correspond to the Baud rate on the computer

when downloading new presets).

9.6. AES / EBU Sub-Menu

Connection of AES/EBU signals is via the existing rear panel XLR connectors.

Menu Selections: With the AES/EBU option fitted, AES Receive and Diagnostic

modes are provided.

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10. Equalisation Curves

Figure 1 - Parametric filter gain curves.

Figure 2 - Parametric filter 'Q' curves.

Figure 3 - Parametric filter High and Low shelf curves.

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Figure 4 - High pass filter curves.

Figure 5 - Low pass filter curves.

Figure 6 - Parametric filter with high 'Q' to achieve notch response.

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11. Specifications

Inputs Two electronically balanced. u

Impedance > 10k ohms.
CMRR >65dB 50Hz - 10kHz.

Outputs Six electronically balanced. u
Source Imp < 60ohms.
Min. Load 600ohm.
Max. Level +20dBm into 600 ohm load.

Frequency Resp. ±0.5dB 20Hz - 20kHz.
Dynamic Range >110dB 20Hz -20kHz. Unwtd.
Distortion < 0.02% @ 1kHz, +18dBm.
Maximum Delay 650 mS. (Increment 2.6 µS)
Output gain adjustable +15dB to -40dB in 0.1dB steps and mute.
Input gain Adjustable +6dB to -40dB in 0.1dB steps.

Parametric Equalisation

Filters 5 Sections per output
Filter gain +15dB to -30dB in 0.1dB steps.
Centre frequency 20Hz - 20kHz, 1/36 octave steps. (368 positions)
Filter Q / BW 0.4 to 128 / 2.5 to 0.008
(Sections switched to shelving response)
Low frequency 20Hz - 1kHz
High frequency 1kHz - 20kHz
Shelf gains ±15dB in 0.1dB steps.
High and Low pass Filters
Filters 1 of each per output.
Frequency (HPF) 10Hz - 16kHz, 1/36 octave steps.
Frequency (LPF) 60Hz - 22kHz, 1/36 octave steps.
Response Bessel / Butterworth 12/18/24dB per octave and

Linkwitz-Riley 24dB per octave.
Limiters
Threshold +22dBu to -10dBu.
Attack time 0.3 to 90 milliseconds.
Release time 4, 8, 16 or 32 times the attack time.

Display 2 x 20 character backlit LCD.
Input meter 2 x 3 point, -24dB to digital clip.
Output meter 6 x 3 point, -24dB to +4dB into limit.
Connectors

Inputs 3 pin female XLR.
Outputs 3 pin male XLR.
External 9 pin DEE connector (RS232)
RS485 3 pin male XLR (out.) 3 pin male XLR (in.)
Power 3 pin IEC.

Power 60 to 250V ±15% @ 50/60Hz.
Consumption < 20 watts.
Weight 3.5kg. Net (4.8kg. Shipping)
Size 1.75"(1U) * 19" * 11.8" (44 * 482 * 300mm) excluding

connectors.

Optional Interfaces Radio link.
Options u = Transformers available.

Due to continuing product improvement the above specifications are subject to change.

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12. Operating Notes

12.1. Operating Level

With any audio signal processing equipment it is necessary to ensure adequate
signal level is used through the device, to avoid sacrificing noise performance. The
TDX2 features a menu selectable choice of operating levels to reduce this problem
(see section 8.6) It is suggested that the operating level chosen should give
adequate level to just light the -6dB LED on the headroom meter with maximum
program level being used. Since the meter is deliberately set to 'over-read' by 3dB,
this still provides 9dB of headroom before clipping occurs. With equalisation in use
it may be necessary to further reduce the input level, as gain within the unit may
cause digital clipping, indicated by the top red LED's lighting.

It should be noted that the figure quoted for the maximum input level options is the
clipping point for that option (not a safe operating level). Always ensure that this
clipping point is no lower than that for the following equipment in the signal chain,
and allow extra margin if equalisation sections are boosted.

12.2. Grounding

The Screen (shield) pins on all audio connectors are normally connected directly to
the ground pin of the IEC mains inlet. The chassis is also directly connected to this
pin. Never operate this unit without the mains safety ground connected. Signal
ground (0V) is in turn connected to the chassis ground.

To avoid ground loops, cable shields should be connected to ground at one end
only. The normal convention is that the shield is only connected at the output XLR.
Provision is also made for separately isolating each input and output shield pin
permanently within the TDX2 by breaking the appropriate PCB track, where marked
with a box and an arrow next to each XLR connector using a small drill bit or cutter.
See the following diagram for details.

Figure 7 - XLR pin 1 Isolation points and 10dB pads

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13. Warranty

No maintenance of the TDX2 is required. If servicing is required, it must only be
carried out by qualified personnel. Do not remove the top cover, as there may be a
risk of electric shock.

All Tannoy electronic components are guaranteed for a period of one year from the
date of shipment, subject to the absence of, or evidence of, misuse, overload or
accidental damage.

For further information please contact your dealer or the distributor in your country.
If you cannot locate your distributor please contact:

DO NOT SHIP ANY PRODUCT TO TANNOY WITHOUT PREVIOUS
AUTHORISATION

This warranty in no way affects your statutory rights.

Customer Services

Tannoy Ltd.
Professional Division
Rosehall Industrial Estate
Coatbridge
Strathclyde ML5 4TF
Scotland

Telephone: [phone]
Fax: [phone]
Email : [e-mail]

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14. Appendices

14.1. Appendix 1 : Limiter threshold

Limiter threshold in dB to Vrms lookup table.

dB Vrms dB Vrms

+22 9.75 +5 1.38
+21 8.69 +4 1.23
+20 7.75 +3 1.09
+19 6.90 +2 0.98
+18 6.15 +1 0.87
+17 5.48 0 0.77
+16 4.89 -1 0.69
+15 4.36 -2 0.62
+14 3.88 -3 0.55
+13 3.46 -4 0.49
+12 3.08 -5 0.44
+11 2.75 -6 0.39
+10 2.45 -7 0.35

+9 2.18 -8 0.31
+8 1.95 -9 0.27
+7 1.73 -10 0.24
+6 1.55

Calculation:
Vrms = 0.7746 x 10 ^ (dBu / 20)

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14.2. Appendix 2: Default Xover Settings

Default X-over settings and names for all formats.

X-over Output 1 Output 2 Output 3 Output 4 Output 5 Output 6

2x2 way+Ms Low High Low High Msub Aux

2 x 3 way Low Mid High Low Mid High

4 way + 2 Low LoMid HiMid High Aux Aux

5 way + 1 Sub Low LoMid HiMid High Aux

6 way LoSub Sub Low LoMid HiMid High

120Hz – 1k82Hz 1k82Hz – 22kHz 120Hz – 1k82Hz 1k82Hz – 22kHz 24.8Hz – 120Hz <10Hz – 22kHz

22.1Hz – 120Hz 120Hz – 1k82Hz 1k82Hz – 22kHz 22.1Hz – 120Hz 120Hz – 1k82Hz 1k82Hz – 22kHz

15Hz – 149Hz 149Hz – 1k31Hz 1k31Hz – 8kHz 8kHz – 22kHz 20.1Hz – 22kHz 20.1Hz – 22kHz

15Hz – 80.3Hz 80.3Hz – 180Hz 180Hz – 1k31Hz 1k31Hz – 8kHz 8kHz – 22kHz 20.1Hz – 22kHz

15Hz – 80.3Hz 80.3Hz – 149Hz 149Hz – 1kHz 1kHz – 4kHz 4kHz – 10k1Hz 10k1Hz – 22kHz

Note: All filters set to 24dB Linkwitz-Riley.

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35

Tannoy Preset Parameters and the latest downloadable preset files are available from your Tannoy
distributor or from our website: www.tannoy.com

Tannoy Limited, Professional Division, Coatbridge, Strathclyde, ML5 4TF, Scotland.
Tel: [phone] Fax [phone]
e-mail: [e-mail] Website: www.tannoy.com

Tannoy / TGI North America Inc., 335 Gage Avenue, Suite 1, Kitchener, Ontario, Canada N2M 5E1.

Tel: [phone] Fax: [phone]
e-mail: [e-mail] or [e-mail] Website: www.tannoy.com

Tannoy Nederland b.v., Anthonetta Kuijlstraat 19, 3066 GS Rotterdam.
Tel: [phone] Fax: [phone]
e-mail: [e-mail] Website: www.tannoy.nl

Tannoy is a member of the Group of Companies

th

ML 6

December, 2000

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