DN100 Active DI Box



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Midas h4000

The KLARK TEKNIK DN100 Single Channel Active Direct Injection Box is designed to provide an extended dynamic range, lower noise floor and all the world-class audio performance you’d expect from KLARK TEKNIK. The DN100 is built to handle the rigours of life on the road: a thick aluminium shell protects the electronics, and this in turn is protected by a tough silicone rubber casing.

The DN100 was designed for professional applications where +48 V phantom power is a standard feature on all mixing consoles. Some DI boxes offer both phantom power and 9V battery operation, however the design compromises required to support both power sources means that the audio performance is degraded. Most notably the amount of signal headroom available. The clip point of the DN100 is significantly higher than many professional active DI boxes and can provide +10 dBu into a 2 kΩ load. This higher clipping point means that much higher level input signals can be accommodated without the need for switching in an attenuating pad. Correspondingly the DN100 only requires a single -30 dB pad for use when connecting directly to instrument amplifier outputs.


  • High-headroom design with +48 V phantom power for extended dynamic range
  • Fully transformer-isolated design ensures electrical separation between PA and stage equipment
  • Balanced line input on Neutrik* XLR and high impedance input and link output on 1/4″ TRS connectors
  • 30 dB input pad and earth lift switches
  • Features Kensington* lock for added security
  • Aluminium extrusion casing with protective silicone rubber sleeve
  • Compact and rugged design
  • Designed and engineered in England
All trademarks belong to their respective owners. Kensington and MicroSaver are registered trademarks of ACCO Brands

DN100 Architect’s & Engineer’s Specification

The Direct injection module shall provide the functions of transformer isolation, impedance matching and attenuation into a low impedance active balanced input. The module shall be able to accept a maximum input level of at least 30dBu provide switchable attenuation from 0 to 30dB and output the signal into a balanced 600 Ω load.

Input connectors shall include two quarter inch jack sockets and one 3-pin XLR socket, all linked. Input impedance shall be 1M Ω (jacks sockets), 20K Ω (XLR only).

The output shall be transformer balanced and isolated, with a source impedance of 150 Ωs, capable of driving a 10dBu signal into a 2k_ load. The output connector shall be a 3-pin XLR socket.

An earth lift switch shall be provided to disconnect input and output grounds when required.

The unit shall obtain power from a 48V phantom supply.

The unit shall achieve or exceed the following specifications:

Output noise -100dBu. 20Hz to 20kHz unweighted, with input terminated by 10k Ω resistor
Distortion (THD+N) < 0.01% @ 1 kHz, +4dBu
Frequency response +0.5/-1dB 20Hz to 20kHz
Power consumption <10mA

The Direct Injection Module shall be the KLARK TEKNIK model DN100 and no alternative option is available.