Behringer ULTRA-DI DI100 Manual - Page 13

13 ULTRA-DI DI100 User Manual 2.3 Converting a microphone from high impedance unbalanced to low impedance balanced Sometimes all that's available (especially when all other mics are in use) is a unbalanced high impedance microphone with an unbalanced jack. With the ULTRA-DI long cable runs to the console can be established without fear of picking up noise and hum. Just plug the jack into the input and connect the output to the console's mic in. 2.4 Tapping a signal from a power amplifier output When no line out is available it is possible to connect an amplifier output directly to the DI100 (for example, recording direct from a guitar amplifier, TV-speaker, etc). It is possible to connect the output, i.e an extra speaker output, of up to 3000 Watts to the ULTRA-DI without fear of overloading. Pay attention to the two -20 dB buttons on the ULTRA-DI! Both must be depressed if an amplifier output is connected to the DI100 input. + Red or positive post To DI100 input - Black or negative post Fig 2.3: Connection to an amplifier output ◊ Always make sure the ground lift is on (no ground link) when connecting to speaker terminals. This prevents accidental short-circuiting of the amplifier output. Also make sure the Tip of the input jack is connected to the red terminal and that the metal housing of the DI100 has no contact with other equipment.