DI adapters
index
Editorial ...............................................
Page 3
Page 9
- NADIT AES/EBU adapters from Neutrik
- We provide accurate solutions!
Passive adapters.......................................
Impedance Transformers AES/EBU..........
Page 4
Video Transformers............................
Page 10
- Professional transformers
- Symmetrical and asymmetrical line
- DI adapters
- Ground loop isolation
semi-professional audio Adapters.....
More Problem Solvers.........................
Page 8
- Semi-professional transformers
- Matcher and splitter on FLF mounting plates
like us on facebook.com/ContrikAG
Page 11
editorial
Dear Customer
Unfortunately, sources of disturbances in audio systems still
manifest nowadays. They are called electromagnetic interferences that may appear as distortion or so-called ground
loops.
These disturbances can enter a system by galvanic coupling,
magnetic and electromagnetic or electrostatic fields.
But it doesn‘t have to be that way.
We provide accurate solutions!
You can‘t protect your system from these influences but you
can take precautions to not let these sources of interference
disturb the system.
Our passive adapters eliminate these unpleasant phenomena
due to proper shielding and grounding as well as galvanic
isolation between input and output.
We also develop customised galvanic insulators for audio
and video.
Please visit our website or contact us in order for us to
support and help you in realising your state-of-the-art
projects. We will find a solution that meets your needs.
Sincerely,
Contrik AG
Passive adapters
Daily occurring sources of disturbances in audio sys-
Groundlift switch screen, Pin 1 on XLRs are operated:
tems are electromagnetic interferences which manifest
themselves as distortions, humming and radio crosstalk.
D = Direct - PIN 1 the screen is connected between
These disturbances may enter the system in various
input and output
ways, e.g. through galvanic coupling or electromagne-
F = Floating - PIN 1 the screen is open between input
tic, electrostatic and magnetic fields. You cannot isolate
and output = galvanic isolation
your system from those influences, but you can take
S=Shield
precautions to not let those sources of interference
input and output and is also connected to the adapter
enter the system. The passive adapter series eliminates
chassis housing of the XLR
- PIN 1 the screen is connected between
those inconvenient phenomena through proper shielding and grounding as well as galvanic separation of
Phantom switch:
input and output.
If there is phantom power, the phantom power switch
interconnects the phantom power through to the PAs.
On all NPK* and ZNPK* products, the transformers
NTL1, NTM1 or NTM4 are integrated and galvanic iso-
Phase-Reverse:
lation of audio signals is provided. The NPK series has
The phase reverse switch crosses Pin 2 and Pin 3 on
additional switches which work as follows:
the XLR output, therefore a phase rotation of audio
signals of 180° takes place.
[
Pa g e 4
]
ZNPKL-NJ3F-3M
Adapter Line, suitable for balanced
transmission of instrument signals with
600 Ω (ohm) impedance, 1:1,
galvanically isolated due to the
interior transformer NTL1.
symmetrical and asymmetrical Lines
ZNPKL-3M-CHS
ZNPKL-3F-CHS
Symmetrical Adapter Line
Balanced transmission adapter line XLR male to (RCA) phono jack,
1:1 transmission for signals with 600 Ω (ohm) impedance, Line up to
6 V, 30 Hz-40 KHz frequency response. The transformed signals are
also galvanically isolated through the internal converter NTL1 .
Asymmetrical Adapter Line
Unbalanced transmission adapter line XLR female to (RCA) phono
jack, 1:1 transmission for signals with 600 Ω (ohm) impedance,
line up to 6 V, 30 Hz-40 KHz frequency response. The transformed
signals are also galvanically isolated through the internal converter
NTL1.
ZNPKL-3M-2CHS
ZNPKL-3F-2CHS
Combiner Line
Combiner Line mixes the two signals left and right by means of a
passive network which are balanced by the NTL1-transformer (galvanic isolation) and terminated by a XLR male output. Suitable for
stereo equipment with unbalanced phono outputs (RCA) to connect
them to a balanced mono input (XLR female).
Splitter Line
The splitter distributes the balanced mono output signals of one
source to 2x unbalanced phono outputs L + R via NTL1 (galvanic
isolation) and a downstream passive network. Especially suited for
transmission lines that should remain balanced and be rendered
unbalanced just before arriving at the user (recipient).
DI
A da p t e r s
[
Pa g e 5
]
DI Adapters
NPKL1
NPKM1
DI-Adapter Line 1
DI-Adapter Line 1 XLR female/XLR male including groundlift
switch with three functions (D=direct, S=shell, O=open) for signals
with 600 Ω impedance, Line up to 6 V, frequency resp. 30 Hz 40 KHz.
DI-Adapter Mic 1
DI-Adapter Mic 1 XLR female/XLR male including groundlift switch
with three functions (D-direct, S=shell, O=open) for signals with
200 Ω impedance, Mic. up to 2.5 V, frequency resp. 30 Hz 40 KHz.
NPKM2
NPKM3
DI-Adapter Mic 2, Phantom
DI-Adapter Mic 2 phantom XLR female/ XLR male including
groundlift switch with three functions (D=direct, S=shell, O=open)
for signals with 200 Ω impedance, Mic. up to 2.5 V, frequency
resp. 30 Hz-40 KHz. Additional switch for 48V phantom power.
DI-Adapter Mic 3, Phantom, Phase Reverse
DI-Adapter Mic 3, phantom, phase reverse XLR female/XLR male
including groundlift switch with three functions (D=direct, S=shell,
O=open) for signals with 200 Ω impedance, Mic. up to 2.5 V,
frequency response 30 Hz-40 KHz. Additional switch for 48V
phantom power, as well a switch for 180° phase conversion.
[
Pa g e 6
]
ZNPKL2-3.5-CHS
Particularly suited to connect external
sources like MP3 Players, CD players
etc. to an AUX input (e.g. car radio)
without volume loss. (Lengths: phono
30 cm, mini plug 1 m).
Ground-loop isolators
ZNPKL-3F-3M
ZNPKL-CHS-CHS
Ground Loop Isolator Line XLR
Ground loop isolator Line XLR female to XLR male, 1:1 transmission
for signals with 600 Ω (ohm) impedance, Line up to 6 V, frequency
30 Hz-40KHz. Transmission with ground lift 1:1 (NTL1), interferences and ground loops can be avoided.
Ground Loop Isolator Line Cinch
Ground loop insulator line, phono jack to phono jack, 1:1
transmission for signals with 600 Ω (ohm) impedance, Line up to
6 V, 30 Hz - 40 KHz frequency. Transmission with ground lift 1:1
(NTL1), interferences and ground loops can be avoided.
ZNPKL2-CHS-F/M
ZNPKL2-3.5-CHS
Ground Loop Isolator Line Phono Stereo
Ground Loop Isolator Line phono stereo input: 2x phono jack,
output: 2x phono plug, 1:1 transmission for signals with 600 Ω
(ohm) impedance, stereo line up to 6 V, frequency response of
30 Hz - 40KHz. Transmission with ground lift 1:1 (NTL1), interferences and ground loops can be avoided (Lengths: 30 cm per side).
Car Hifi AUX Ground Loop Isolator Line
Car Hifi AUX Input 3.5 mm stereo plug, output 2x phono plugs, 1:4
transmitter of a signal with 200 Ω (ohm) impedance, stereo line up to
1.2 V, frequency response 30 Hz - 40 KHz. Signal transmission 1:4
(NTM4) with separated mass, interferences and ground loops can be
avoided. Particularly suited to connect external sources.
DI
A da p t e r s
[
Pa g e 7
]
more problem solvers
ConnectionInput volt.Output volt.
ConnectionInput volt.Output volt.
XLR (Combo) st.
Phono stereo
Plug stereo 6.3 mm (Combo)
Wago Clamps
+4dBu orange +, black -, white GND
+ 4dBu -10dBV -10dBV +4dBu
+4dBu
+4dBu
XLRM
Phono (Recording-Output)
+4dBu
-10dBV
*(Wago-Clamps; orange+, black -, white GND)
ZNPKL-SYM-MATCH
ZNPKL-SYM-SPLIT
This matcher is particularly suitable for 2x FLF external floor
sockets as multifunctional stereo audio input. All signals are
galvanically isolated via a special audio transmitter and led leveladapted to a joint clamp output. The balanced signals XLR
(+4dBu) are transferred 1:1 to the rear side clamp output. The
unbalanced signals (-10dBV) phono and 6,3 mm stereo jack
(Combo) are transformed 1:4 to the clamp output through the
same internal transmitter up to an output level of about +4dBu.
The phono inputs are switched in parallel to the combo jack input.
Hence an output level of about +4dBu can always be reached, irrespective of whether there is a balanced (+4dBu) or an unbalanced
input signal (-10dBV). The mass of the balanced (switch position
= up) or the unbalanced (switch position = down) source can be
connected through to the output with the front switch. When set in
mid-position, the mass is interrupted.
Black FLF mounting plate, equipped with one splitter, which is
particularly suitable for recording existing balanced stereo transmissions (e.g. interpreter equipment). Galvanic isolation is offered
as well as an additional level-adjusted unbalanced RCA output
signal. The rear balanced signal (+4dBu) fed on the pressure
clamp is splitted into 2 outputs through the internal transmitter
(galvanic separation). These connections XLRM (+4dBu, balanced)
and RCA (-10dBV, unbalanced) are provided to make the signal
available for further signal processing.
[
Pa g e 8
]
(Lengths: XLR 30 cm, mini plug 1m)
ZNPKL2-3.5-XLRM
Unbalanced to balanced stereo converter
for e.g. PC soundcards (input: 3.5 mm
stereo plug, output: 2x XLR 3p male). 1:1
transmission for signals with 600 Ω (ohm)
impedance, stereo line up to 6 V,
frequency: 30 Hz–40 KHz.
Impedance Transformers Aes/EBU (SPDIF)
For long cable runs it is appropriate to use low attenuation coaxial cables instead of twisted pair (STP) cables. Adapters of the Neutrik
NADIT series can be used as transformers. They passively transform the characteristic impedance of a balanced 110 Ω (ohm) twisted
pair cable to a 75 Ω (ohm) unbalanced coaxial cable and vice versa.
NADITBNC-F
NADITBNC-M
3-pole XLR female chassis connector 110 Ω (ohm) input to BNC
female chassis connector 75 Ω (ohm) output.
BNC female chassis connector 75 Ω (ohm) input to 3-pole XLR male
chassis connector 110 Ω (ohm) output.
NADITBNC-FX
NADITBNC-MX
3-pole XLR female cable connector 110 Ω (ohm) input to BNC female chassis connector 75 Ω (ohm) output.
BNC female chassis connector 75 Ω (ohm) input to 3-pole XLR male
cable connector 110 Ω (ohm) output.
NADITBNC-F
DI
A da p t e r s
NADITBNC-M
For all NADIT:
Frequency range: 0.1 MHz to 6 MHz
Max. rated voltage: 5 Vpp
VSWR < 1.1
Reflection effect: > 26.4 dB
Insertion Loss: < 0.3 dB @ 0.1 MHz bis 10 MHz
[
Pa g e 9
]
video transformers
NTV1-NAPG-0
NTV2
Video transformer 1:1 in NAPG-0 housing with BNC connectors.
Suitable for galvanic isolation, suppression of interferences and to
connect different video cables. For 19” panels P12-* and P16-*,
1 RU. Measurements: L x W x H = 70 x 30 x 25 mm, Frequency
range min.: 50 Hz, Frequency range max.: 7.5 MHz, Video level:
1 Vpp, Transmission loss: 1dB.
Video transformer 1:1 with 75 Ω (ohm) BNC connectors, for
galvanic isolation and suppression of interferences of professional
video applications.
Measurements: L x W x H = 60 x 50 x 30 mm,
Frequency range min.: 20 Hz, Frequency range max.: 10 MHz,
Video level: 1.5 Vpp, Transmission loss: 1dB.
NTV3
Video splitting transformer 1:1 in NA-housing with 75 Ω (ohm) Y/C
connectors. Suitable for 19” panels P12-* and P16-*, 1 RU.
Measurements: L x W x H = 70 x 30 x 25 mm, Frequency range
min.: 50 Hz, Frequency range max.: 7.5 MHz, Video level: 1 Vpp,
Transmission loss: 1dB.
[
Pa g e 1 0
]
NX-Balun-HD
This ground isolator (transformer)
serves for potential isolation for
HD signals up to 1.485 Gbit/s (DC
ISOLATION 1000 V).
semi-professional audio Adapters
NA2BBNC-D*
NA2*-D0B-TX
Robust housing of extrusion pressed aluminium, RCA types are
colour coded.
NA2BBNC-D4B = BNC female connector to phono female, yellow
NA2BBNC-D9B = BNC female connector to phono female, white
Miniature transformer balancing adapter 1:1, black coded, Impedance ratio: 200:200, Input/output impedance in ohm: 200/2k,
(600/10k), Max. input level (@ 50 Hz, 1% THD): -3 dBu
NA2M-DOB-TX = 3-pole XLR male to female phono connector
NA2F-DOB-TX = 3-pole XLR female to female phono connector
NA2*-J-TX
NA2*-D2B-TX
Miniature transformer balancing adapter 1:1, with 3-pole XLR with
ground breaker. Impedance ratio: 200:200,
Input/output impedance in ohm: 200/2k, (600/10k)
Max. input level (@ 50 Hz, 1% THD): -3 dBu
NA2M-J-TX = 3-pole XLR male to plug 6.35 mm
NA2F-J-TX = 3-pole XLR female to jack 6.35 mm
Miniature transformer balancing adapter 1:1, red coded,
Impedance ratio: 200:200,
Input/output impedance in ohm: 200/2k, (600/10k)
Max. input level (@ 50 Hz, 1% THD): -3 dBu
NA2M-D2B-TX = 3-pole XLR male to female phono connector
NA2F-D2B-TX = 3-pole XLR female to female phono connector
DI
A da p t e r s
[
Pa g e 11
]
© Contrik AG, Version 1/4.2015