Pro Co DB1-PROCO
Professional Passive Direct Box

OUR PART #  DB1-PROCO


The Pro Co DB-1 is a professional quality passive direct box for connection of unbalanced musical instruments, line-level sources, and guitar amplifier outputs to low-Z balanced microphone input for PA or recording. 1/4" (6.35mm) input (with parallel 1/4" output). Switches for speaker/line-level attenuation, high-cut filter, and ground lift. Male XLR-type balanced mic-level output. Uses Pro Co DBT-1 transformer (20k/150 ohm).

Pro Co DB-1 Features:

  • Floating transformer-balanced XLR output for maximum isolation
  • SPKR mode handles amplifiers up to 600W RMS
  • HI CUT filter reduces distortion
  • GND/LIFT switch eliminates hum and buzz
  • Rugged "Uni-box" construction for super-strength and shielding
  • Recessed switches and connectors resist damage
  • Passive design requires no batteries or phantom power

    Pro Co DB-1 Specifications:

    • Frequency Response: 20 Hz - 20 kHz, +/-0.5 dB @ -15 dBv output
    • Total Harmonic Distortion:
      • Less than .03% 20 Hz-20 kHz @ -30 dBv output
      • Less than .1% 30 Hz-20 kHz @ -15 dBv output
      • Less than .25% 20 Hz-20 kHz @ -15 dBv output
    • Phase Response: Less than -18° @ 20 kHz (ref. 1.0 kHz)
    • Rise Time: Less than 4.5 microseconds (2.0 kHz square wave, 10%-90%)
    • Input Impedance:
      • Greater than 130k Ohms @ 1.0 kHz
      • Greater than 105k Ohms @ 10 kHz
    • Output Impedance:
      • Less than 200 Ohms @ 1.0 kHz
      • Less than 215 Ohms @ 10 kHz
    • Voltage Stepdown: Less than 22 dB @ 1.0 kHz
    • Maximum Input Level for 1% THD:
      • +16 dBv (INST mode), +34 dBv (SPKR mode) @ 20 Hz
      • +21 dBv (INST mode), +41 dBv (SPKR mode) @ 30 Hz
      • +26 dBv (INST mode), +46 dBv (SPKR mode) @ 50 Hz
    • Dimensions (LxWxH): 4.875" x 4.375" x1.75" (123.8 x 111.1 x 44.4 mm)
    • Weight: 1.0 lb. (0.45 kg)
    • Shipping Weight: 2.0 lbs. (0.91 kg)
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