Passive Direct Box with Ground Lift and Attenuator


Product Description

 The DB-MK1 is one of the most useful and versatile tools available and indispensable in enabling easy interfacing and connection between various audio gear in numerous applications.

Throw the Sound Block in a bag, trunk, or anywhere cable and misc. audio supplies are stored. The heavy‑duty construction and passive electronics make the Sound Block nearly indestructible. This Direct Interface is extremely versatile as a Lo to Hi‑Z transformer for electric instruments and devices to XLR mic inputs or as Lo‑Hi‑Z to use a microphone with a guitar amp (not recommended only because guitar amps make terrible PAs).

High level outputs from active instruments and even speaker outputs are not a problem when using the ‑20 or ‑40 db attenuator switch. The Sound Block is a very easy to use passive device. Simply plug your 1/4″ output from a guitar or electric piano, plug an XLR cable into your mixer’s channel input, and you’re done. A ground lift is provided for use in older buildings with janky wiring or if circuits are different from stage to where the sound system is located.

  • Perfect for all live sound permanent installations, club, church and
  • practice PA systems, monitor systems, home and project recording
  • studios, karaoke and DJ sound systems.
  • Enables the connection of any unbalanced audio source signal (such as from an electric instrument, keyboard–even from an amp speaker output) to any balanced input (such as that of a mixer).
  • Parallel Output allows simultaneous connection to 2 separate inputs (such as to an amp and mixer).
  • Translates high-impedance instrument outputs into low-impedance balanced signals or balanced low-impedance balanced signals into unbalanced outputs.
  • Converts unbalanced +10dB DJ mixer signals to balanced line level signals, enabling both easier interfacing with consoles and longer cable runs.
  • Enables multiple keyboard setups plugged into an instrument amp to be directly input to a console mixer by connecting the speaker outputs of the amp to the console input through the DB-1, thus eliminating the need for a derect box on each keyboard.
  • 3-position input attenuation switch (0dB, -20dB, -40dB) facilitates proper output signal levels for optimum level matching to connected equipment.
  • Switchable ground lift eliminates ground loop hum problems.
  • Rugged, roadworthy all-steel construction for years of continuous reliability


Input Attenuation:Switchable (0dB, -20dB, -40dB)Balanced Output:600 balanced XLR jack
Instrument Input:50K unbalanced TS jackGround Lift:Switchable ground lift
Parallel (Link) Out:50K unbalanced TS jackConstruction:All steel chassis
Size: 120mm X 76.5mm X 45mm


User Manual

User Manual

  • Manual Guide


Where to buy