Pro Co DB1

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).

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

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 degrees @ 20 kHz (ref. 1.0 kHz)
• Rise Time: less than 4.5 microseconds (2.0 kHz square wave, 10%-90%)
• Input Impedance
  • greater than 130 kohm @ 1.0 kHz
  • greater than 105 kohm @ 10 kHz
• Output Impedance
  • less than 200 ohm @ 1.0 kHz
  • less than 215 ohm @ 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
  • Length: 4.875" (123.8 mm)
  • Width: 4.375" (111.1 mm)
  • Height: 1.75" (44.4 mm)
• Weight: 1.0 lb. (0.45 kg)
• Shipping Weight: 2.0 lbs. (0.91 kg)