PSG Audio Direct Box with Ground Lift and Attenuator DB-MKI

The DB-MK1 is one of the most useful and versatile tools available, and an indispensable solution for easy interfacing between a wide range of audio equipment. Whether in live sound, studio work, broadcast, DJ setups, or general audio troubleshooting, this compact Sound Block is designed to make connections simple, clean, and reliable.

Built with heavy-duty construction and fully passive electronics, the DB-MK1 is nearly indestructible—perfect for tossing into a gig bag, toolbox, or cable trunk. This direct interface functions as a Lo-Z to Hi-Z transformer for connecting electric instruments and devices to XLR microphone inputs, or as a Hi-Z to Lo-Zconverter for connecting microphones into guitar amps (though not recommended for sound quality—guitar amps make terrible PAs).

High-level signals are no issue: the –20 dB and –40 dB attenuation switches safely handle outputs from active instruments, keyboards, DJ mixers, and even speaker-level amplifier outputs when needed.

Using the DB-MK1 is simple: plug your 1/4″ output (guitar, bass, electric piano, etc.) into the input, send the XLR output to a mixer, and you’re ready to go. A Ground Lift switch is included to eliminate hum caused by ground loops—especially useful in older buildings or stages with questionable electrical wiring.

Tough, reliable, and incredibly adaptable, the DB-MK1 is a must-have tool for musicians, engineers, and audio technicians.