Pro Co CB1

Passive direct box for connection of unbalanced musical instruments and line-level sources to low-Z balanced microphone input for PA or recording. Not recommended for speaker-level use. 1/4" (6.35mm) input (with parallel 1/4" output). Switch for ground lift. Male XLR-type balanced mic-level output. Uses Pro Co CBT-1 transformer (20k/150 ohm).

Features

• High input impedance minimizes loading for maximum sound
• Floating transformer-balanced XLR output for maximum isolation
• GND/LIFT switch eliminates hum and buzz
• Handles line-level inputs to +20 dBv at 20 Hz
• 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, +/-1.0 dB @ -15 dBv output
• Total Harmonic Distortion
• less than .1% 20 Hz-20 kHz @ -30 dBv output
• less than .5% 30 Hz-20 kHz @ -15 dBv output
• less than 1.0% 20 Hz-20 kHz @ -15 dBv output
• Phase Response: less than -25 degrees @ 20 kHz (ref. 1.0 kHz)
• Rise Time: less than 6.0 microseconds (2.0 kHz square wave, 10%-90%)
• Input Impedance
• greater than 185 kohm @ 1.0 kHz
• greater than 140 kohm @ 10 kHz
• Output Impedance
• less than 130 ohm @ 1.0 kHz
• less than 155 ohm @ 10 kHz
• Voltage Stepdown: less than 23 dB @ 1.0 kHz
• Maximum Input Level for 1% THD
• +20 dBv @ 20 Hz
• +26 dBv @ 30 Hz
• +32 dBv @ 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)