Pro Co DB1 Professional Passive Direct Box

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)