c a t a l o g u e Talkback
Talkback
6 Way Talkback Intercoms
June 2012
catalogue
Manufacturers of audio & video products
for radio & TV broadcasters
Talkback & Commentary
TB-6D & TB-6R
TB-6D 6 Way Talkback Intercom Front View.
“
The Sonifex Talkback
Intercoms provide a cost
effective way of enabling
talkback between up to 7
areas in a studio complex.
pressed, and routes the
presenter audio to it.
Talkback refers to the
standard method of
communication between
broadcast studios.
TB-6D 6 Way Talkback
Intercom, desktop free
standing
Each studio can have either
a desktop, a rack-mount, or
mixer-mounted intercom,
usually containing a row of
switch buttons.
Each switch button connects
to another studio when
There are 2 products in the
Sonifex Talkback Intercom
range :
TB-6R 6 Way Talkback
Intercom, 19” rack mounted
The TB-6D and TB-6R are
general talkback interfaces
which can be connected
together to form a talkback
system.
The TB-6D and TB-6R are used for general
talkback between studios and use DC
signalling, also known as ground lifting or
ground signalling, to communicate
with each other. These units can be installed
in various locations throughout a studio
complex and linked to one another, with
each unit being able to talkback to up to
6 others connected together. Most other
talkback systems in general operation also
use DC signalling, so you should be able to
add these units into an existing installation.
Desktop Or Rackmount
The TB-6D and TB-6R are identical in
operation, with the TB-6D used for desktop
operation and the TB-6R available as a 2U
rack-mount, for use for example, in a central
X
apparatus room or central technical area.
Tel: +44 (0)1933 650 700 Fax: +44 (0)1933 650 726 Email: sales@sonifex.co.uk Internet: www.sonifex.co.uk
Talkback & Commentary - TB-6D & TB-6R
“
The TB-6D is used for
communicating with up to six
other locations using the onboard
electret mic. It can also monitor two
external sources.
6 Way Talkback Intercoms
Talkback & Commentary
Talkback For Up To 7 locations
Up to 7 locations or studios can
communicate with each other.
On each panel, there are 6 front panel
buttons for talkback selection and 2 for
external inputs. When a button is pressed,
the button lights up and the talkback is
active to that location.
Talkback & Commentary - TB-6D & TB-6R
TB-6D Rear View.
Radio Studio Application Using TB-6D & TB-6R
A typical application would be to
distribute talkback and audio feeds
around a radio or TV studio complex,
as in this diagram.
The TB-6D and TB-6R units are daisychained together from location to location
and the radio station output from an
off-air receiver is distributed on input
EXT 1 of each unit.
The EXT 2 input could be used in the news
or sales area for monitoring local sources
such as a PC audio output.
RECEPTION-AREA
Talkback
EXT 1
Linking the studios in this way allows
all locations to talk to each other together
with the ability to monitor 2 external
feeds, with independent control of
monitor muting and headphone/
speaker levels.
MAIN ON-AIR STUDIO 1
Talkback
EXT 1
TB-6D or
TB-6D
TB-6R
TALKBACK
MONITOR
LEVEL
EXT 1
EXT 2
MIC
INPUT
INTERCOM
6
5
4
HEADPHONE
3
2
1
TB-6R
NEWS AREA
Portable MD/
Flashcard
Recorder/Player
Talkback
EXT 1
PRODUCTION STUDIO/ON-AIR
STUDIO 2
Talkback
EXT 1
TB-6D or
TB-6R
TALKBACK
MONITOR
LEVEL
EXT 2
EXT 1
EXT 2
MIC
INPUT
INTERCOM
6
5
4
HEADPHONE
3
2
1
TB-6R
TB-6D
SALES AREA
CENTRAL TECHNICAL AREA
Talkback
TB-6R
TALKBACK
PC Soundcard
EXT 1
EXT 2
MONITOR
LEVEL
EXT 1
EXT 2
INTERCOM
6
5
4
HEADPHONE
MIC
INPUT
TB-6R
3
1
2
Off-Air
Receiver
Talkback
EXT 1
EXT 2
Outside
Sourcing,
eg. codec
TB-6D
Tel: +44 (0)1933 650 700 Fax: +44 (0)1933 650 726 Email: sales@sonifex.co.uk Internet: www.sonifex.co.uk
Talkback & Commentary
X
Press & Release, Press & Hold
Operation
Onboard Electret Mic or
External Mic
The buttons work with both a momentary
and latched operation. If you simply press
the button, talkback will be on and can be
cancelled by pressing the button again. If
you press and hold the button, the selection
is cancelled when released. So, if you
wanted to listen to an external input, such
as the radio station feed, or off-air monitor,
you could simply press the EXT 1 button. If
you receive talkback from another studio
when the external input buttons are also
pressed, the external inputs can be either
muted or mixed, depending on the setting
of an internal jumper.
You can speak to the separate locations
using the onboard front-panel electret mic
or there is a separate external mic input
on a 3 pin XLR female connector, into
which you can plug a suitable gooseneck
microphone.
The talkback outputs and input are balanced
signals on a 15-way male
D-type plug and the talkback input can be
adjusted from -28dB to 9dB using a rear
panel preset pot.
TB-6R Rear View.
There is a rear panel switch to select
between the electret and separate input
mic. The mic input gain range is adjustable
via a rear panel preset pot between 74dB
and 53dB.
Monitoring External Inputs
The unit can monitor two external sources.
The EXT 1 input is a balanced stereo
input on a rear panel 9 pin D-type socket.
The EXT 2 input is an unbalanced stereo
input on the 9 pin D-type socket as well
as dual phono sockets. EXT 1 is useful for
monitoring a distributed signal, such as a
radio tuner off-air feed, or an outside source
routed from an ISDN codec. EXT 2 is useful
for monitoring a local source, such as a
portable minidisc/flashcard recorder/player,
or the unbalanced soundcard output from a
PC editing/playback package.
If you already use a mixer which has a
talkback input and output, or continuous
talkback output, or just a line level output
which you want to use, by changing internal
jumpers the intercom can be configured
to use these connections instead of the
on-board microphone and speaker/
headphones. For example, if you have a mic
channel on a mixer assigned to talkback
and the presenter is using headphones for
monitoring the mixer talkback, the Talkback
Intercom can be used purely for talkback
switching and for monitoring external
inputs.
Built-in Loudspeaker
& Headphones
For monitoring, you can use either the
built-in 1W loudspeaker, or headphones
on a 6.35mm unbalanced stereo jack. The
headphones provide 150mW into 32-600Ω
headphones. When the headphones are
used, the speaker is automatically muted.
Additionally, the monitor speaker can be
muted via a remote contact on the 9 pin
D-type External Input connector, for
example, when used in an area with live
microphones. Both monitor and headphone
levels are fully adjustable between -60dB
and 9dB using the front panel volume
control.
Tel: +44 (0)1933 650 700 Fax: +44 (0)1933 650 726 Email: sales@sonifex.co.uk Internet: www.sonifex.co.uk
Talkback & Commentary - TB-6D & TB-6R
TB-6R Front View.
Talkback & Commentary
1
2
3
5
4
6
TB-6D & TB-6R
TALKBACK
SWITCHES
EXT1
EXT2
EXTERNAL
INPUT 2
VOLUME
CONTROL
L
J4
LOUDSPEAKER LOUDSPEAKER
DRIVER
R
SWITCHING/
ROUTING
J5
Talkback & Commentary - TB-6D & TB-6R
MUTE
EXT INPUTS
MUTE
CONTROL
EXTERNAL
INPUTS
J1
HEADPHONE
OUTPUT
MUTE
T/BACK IN
T/BACK CTRL
T/BACK GAIN
TB-6D & TB-6R
J3
T/BACK OUT
EXT MIC
AGC
ELECTRET
MIC
TRX
TALKBACK
OUTPUTS/
INPUT
MIC GAIN
TRX
Technical Specification For Talkback Intercoms
Audio & Power Specification
Talkback Input/Outputs:
Talkback Input Gain Range:
External Inputs & Mute:
External Input 2:
External Inputs Impedance:
External Talkback Input Impedance:
External Talkback Output Impedance:
External Microphone Input:
Mic Input Impedance:
Microphone Input Gain Range:
Headphone Output:
Headphone Output Gain Range:
Loudspeaker Power:
Mains Input Power:
Fuse Holder:
Physical Specification
Order Code
TB-6D
TB-6R
15 way male D-type plug (TB-6D & TB-6R) for 6 balanced talkback outputs and 1 balanced talkback input
9dB to -28dB adjusted by rear panel preset pot
9 way female D-type socket, for stereo balanced external input 1, stereo unbalanced external input 2 (or external talkback input/output),
talkback control output and mute input
Dual phono socket, stereo unbalanced in parallel with the 9 way female D-type socket
> 30kΩ unbalanced
> 40kΩ balanced
> 30kΩ unbalanced
< 80Ω unbalanced
3 pin female XLR socket
1.5kΩ balanced
74dB to 53dB adjusted by rear panel preset pot
6.35mm (1/4”) jack, unbalanced stereo capable of driving 150mW into 32-600Ω headphones
9dB to <-60dB (off ) adjusted by front panel pot
1W
85V - 264V AC, 47-63Hz, max 10W
1A anti-surge fuse
Description
6 Way Talkback intercom, desk units
3.6”
6 Way Talkback intercom, 19” rack mounted
3.5”
Height
9.1cm
8.8”
8.9cm
19”
(2U)
Width
22.5cm
8.8”
48.3cm
7.3”
(19” rack)
(48cm rack)
Depth
22.4cm
2.75lb
18.5cm
5.7lb
Total Nett Weight
1.25kg
4.4lb
2.60kg
8.8lb
Total Gross Weight
2.0kg
4.0kg
Tel: +44 (0)1933 650 700 Fax: +44 (0)1933 650 726 Email: sales@sonifex.co.uk Internet: www.sonifex.co.uk
www.sonifex.co.uk
t:+44 (0)1933 650 700
f:+44 (0)1933 650 726
sales@sonifex.co.uk
61 Station Road
Irthlingborough
Nor thants NN9 5QE
United Kingdom
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