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 X-
over.
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
EN60065 (1993)
Electrical Safety (EU):
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
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 ‘lock-
out’ 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.
· 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.
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· 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.
12. Mute Keys – Six output mute keys with LED indicator.
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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 Linkwitz-
Riley 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
1.31
1.37
1.19
1.35
1.15
0.69
0.76
0.73
0.84
0.74
0.87
Butterworth 12dB/octave
Bessel 18dB/octave
Butterworth 18dB/octave
Bessel 24dB/octave
Butterworth 24dB/octave
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 2.6mS 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 Ö(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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